In our vast oceans and water bodies, an intricate ecological dance unfolds beneath the surface, guided in part by light-detecting molecules called phytochromes. 



These remarkable sensors are found in the bodies of tiny phytoplankton, and enable them to adapt and thrive in dynamic aquatic environments.



Phytoplankton are the backbone of marine food chains. They play a critical role in regulating our planet's climate by absorbing atmospheric CO2 and producing half of the world's oxygen through photosynthesis.



Despite their immense importance, the mechanisms behind the distribution and behavior of phytoplankton remain a scientific mystery that sparks ongoing curiosity and research.



<h2 class="wp-block-heading" id="h-diatoms-with-built-in-light-detection">Diatoms with built-in light detection </h2>



In a joint effort, scientists from <a href="https://www.cnrs.fr/fr" target="_blank" rel="noreferrer noopener">CNRS</a> and <a href="https://www.sorbonne-universite.fr/en" target="_blank" rel="noreferrer noopener">Sorbonne University</a> set out to investigate the movements of these microscopic organisms in the water column. The focus was primarily on <a href="https://www.earth.com/news/tiny-plankton-play-a-big-role-in-the-global-carbon-cycle/" target="_blank" rel="noreferrer noopener">diatoms</a>, a major group of <a href="https://www.earth.com/news/arctic-heatwaves-have-complex-effects-on-phytoplankton-food-web/" target="_blank" rel="noreferrer noopener">phytoplankton</a>.



Through rigorous research, the experts discovered that diatoms have a built-in light detection system, comprising sensors that are encoded directly into their genomes. 



The light-sensitive pigments, known as phytochromes, are essentially microscopic "eyes" that allow diatoms to perceive changes in the light spectrum present at different depths of water. This provides the diatoms with data about their vertical position in the water column.



Knowing whether you are shallow or deep in the water becomes incredibly useful, especially in turbulent water bodies like the high latitude, temperate, and polar regions that witness intense <a href="https://www.earth.com/news/atlantic-and-arctic-mixing-is-crucial-for-earths-climate-stability/" target="_blank" rel="noreferrer noopener">water mixing</a>.



By interpreting the information relayed by phytochromes, diatoms adjust their photosynthetic activity, and thus, survive and thrive.



<h2 class="wp-block-heading" id="h-tiny-timekeepers-of-the-aquatic-world">Tiny timekeepers of the aquatic world</h2>



The researchers took their study a step further by scrutinizing environmental genomic data gathered from marine sampling expeditions. They observed an intriguing pattern: phytochromes were solely present in diatoms from zones outside the Tropics of Cancer and Capricorn.



These regions are marked by notable differences in day length, highlighting a strong sense of seasonality.



The presence of phytochromes in diatoms from these latitudes suggests that the light sensors may also double as biological clocks, helping diatoms measure the passage of time translating into seasons.



<h2 class="wp-block-heading" id="h-critical-insights-into-phytoplankton-behavior">Critical insights into phytoplankton behavior</h2>



The research, published in the journal Nature, provides a fresh perspective on how phytoplankton, specifically diatoms, perceive and react to light in order to navigate their surroundings.



Probing into the secrets of phytoplankton behavior and their adaptive mechanisms doesn't just feed scientific curiosity - it holds the potential to profoundly enhance our understanding of <a href="https://www.earth.com/news/overfishing-and-habitat-degradation-have-devastated-marine-ecosystems/" target="_blank" rel="noreferrer noopener">marine ecosystems</a> and the complex dynamics that govern them.



As our environments continue to change, such insights could prove invaluable in preserving the ecological balance of aquatic ecosystems.



<h2 class="wp-block-heading" id="h-phytochromes-beyond-light-detection">Phytochromes: Beyond light detection</h2>



While the role of phytochromes in light detection is remarkable, their functionality may extend beyond navigation and adaptation to light conditions. 



Emerging research suggests that these molecular sensors could influence the efficiency of photosynthesis in diatoms. 



By detecting subtle changes in the light spectrum around diatoms, phytochromes may help optimize the energy conversion process, allowing diatoms to make the most of varying light availability in their environment.



This adaptive advantage is particularly significant in turbulent waters, where light intensity and quality shift rapidly. 



Diatoms equipped with phytochromes are better positioned to compete for resources, which ensures their survival and their ability to sequester carbon and produce oxygen. 



Understanding how phytochromes contribute to these processes could unlock innovative approaches to mitigating climate change. For example, experts could potentially harness phytoplankton's natural abilities to absorb atmospheric CO2.



<h2 class="wp-block-heading" id="h-the-global-importance-of-phytoplankton">The global importance of phytoplankton</h2>



Phytoplankton may be microscopic, but their impact extends across the entire planet. These tiny organisms form the foundation of the marine food webs that support everything from <a href="https://www.earth.com/news/zooplankton-are-rapidly-escalating-the-threat-of-nanoplastics/" target="_blank" rel="noreferrer noopener">zooplankton</a> to the largest whales.



Beyond their ecological role, they are also crucial to Earth's climate system. By absorbing vast amounts of carbon dioxide through photosynthesis, phytoplankton act as a natural buffer against global warming, and help to regulate atmospheric CO2 levels.



However, this delicate balance is increasingly under threat. Climate change, pollution, and ocean acidification are altering marine environments, and disrupting phytoplankton populations along with the ecosystems they support.



Research into the adaptive mechanisms of phytoplankton highlights the urgency of preserving the health of our oceans. Protecting phytoplankton is not just about saving marine life - it’s about safeguarding the stability of our planet's climate and resources for future generations.



The full study was published in the journal <a href="https://www.nature.com/articles/s41586-024-08301-3" target="_blank" rel="noreferrer noopener">Nature</a>.



Image Credit: John Dolan/CNRS Images



-----



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-----

Light-detecting molecules guide diatoms through turbulent waters

In our vast oceans and water bodies, an intricate ecological dance unfolds beneath the surface, guided in part by light-detecting molecules called phytochromes. These remarkable sensors are found in the bodies of tiny phytoplankton, and enable them to adapt and thrive in dynamic aquatic environments. Phytoplankton are the backbone of marine food chains. They play a critical role in regulating our planet's climate by absorbing atmospheric CO2 and producing half of the world's oxygen through photosynthesis. Despite their immense importance, the mechanisms behind the distribution and behavior...

Butterflies Hold Clues To Cheaper Solar Energy. The humble butterfly could hold the key to unlocking new techniques to make solar energy cheaper and more efficient, pioneering new research has shown.

A team of experts from the University of Exeter has examined new techniques for generating photovoltaic (PV) energy - or ways in which to convert light into power.

They showed that by mimicking the v-shaped posture adopted by <a href="http://www.earth.com/news/broccoli-and-cabbage-reduce-the-risk-of-heart-attack/">Cabbage</a> White butterflies to heat up their flight muscles before take-off, the amount of power produced by solar panels can increase by almost 50 per cent.

Crucially, by replicating this 'wing-like' structure, the power-to-weight ratio of the overall solar energy structure is increased 17-fold, making it vastly more efficient.Butterflies Hold Clues To Cheaper Solar Energy

The research by the team from both the Environment and Sustainability Institute (ESI) and the Centre for Ecology and Conservation, based at the University of Exeter's Penryn Campus in Cornwall, is published in the leading scientific journal, Scientific Reports.

Professor Tapas Mallick, lead author of the research said: "Biomimicry in engineering is not new. However, this truly multidisciplinary research shows pathways to develop low cost solar power that have not been done before."

The Cabbage White butterflies are known to take flight before other butterflies on cloudy days - which limit how quickly the insects can use the energy from the sun to heat their flight muscles.

This ability is thought to be due to the v-shaped posturing, known as reflectance basking, they adopt on such days to maximise the concentration of solar energy onto their thorax, which allows for flight.

Furthermore, specific sub-structures of the butterflies' wings allow the light from the sun to be reflected most efficiently, ensuring that the flight muscles are warmed to an optimal temperature as quickly as possible.

The team of scientists therefore investigated how to replicate the wings to develop a new, lightweight reflective material that could be used in solar energy production.

The team found that the optimal angle by which the butterfly should hold its wings to increase temperature to its body was around 17 degrees, which increased the temperature by 7.3 degrees Centigrade compared to when held flat.

They also showed that by replicating the simple mono-layer of scale cells found in the butterfly wings in solar energy producers, the could vastly improve the power-to-weight rations of future solar concentrators, making them significantly lighter and so more efficient.

Professor Richard ffrench-Constant, who conducts world-leading research into butterfly mimicry at the University of Exeter, said: "This proves that the lowly Cabbage White is not just a pest of your cabbages but actually an insect that is an expert at harvesting solar energy."

The paper, White butterflies as solar photovoltaic concentrators, by Katie Shanks, Dr Senthilarasu Sundaram, Professor Richard ffrench-Constant and Professor Tapas Mallick from the University of Exeter, is available online.

---

<a href="http://www.exeter.ac.uk/" target="_blank" rel="noopener noreferrer">University of Exeter</a>

Butterflies Hold Clues To Cheaper Solar Energy

Butterflies Hold Clues To Cheaper Solar Energy. The humble butterfly...

Triathletes Ignore Warnings And Swim In Polluted Rio Copacabana Beach Waters. Triathletes swam in waters off Copacabana Beach Friday ahead of weekend Olympic test events, despite published warnings that water in the area was "unfit" for swimming.
The website of the Rio de Janeiro environmental agency said the water, which has been declared unfit ten previous times this year, was unsafe based on the results of a Monday water test.
Officials publicly insisted athletes were safe and stuck to the competition schedule. Later in the day, Rodrigo Garcia, the sports director for the local Olympic organizing committee, said that new, unpublished water test results show that the area is suitable for the competition, but provided no details on the results. The Rio environmental agency didn't respond to requests for comment.
The situation prompted new concern about Rio's polluted waters. On Thursday, The Associated Press released the results of a five-month investigation that showed that Olympic venues are rife with disease-causing viruses and bacteria.
The AP study showed that the spot where athletes were entering the water on Copacabana Beach had a minimal reading of over 2 million human adenovirus per liter - that's 2,000 times the reading that water experts in the U.S. say would be considered highly alarming if seen on beaches in the U.S. or Europe. At the high end, Copacabana registered 49 million adenoviruses per liter in the AP study.
Human adenovirus multiply in the intestinal and respiratory tracts of people. These are viruses that are known to cause respiratory and digestive illnesses, including explosive diarrhea and vomiting, but can also lead to more serious heart, brain and other diseases.
More than 150 athletes are competing in an Olympic qualifier and Paratriathlon event beginning Saturday. Teams gathered on Copacabana Beach said the International Triathlon Union (ITU) gave them guarantees the water was safe.
"The information we have is that it's safe to swim," said Amanda Duke, team manager for the U.S. paratriathlon team.
But officials with the group may consider pushing for expanded testing of Rio's waters, said Shin Otsuka, executive board member of ITU. Currently, tests evaluate bacteria, but not viruses.
"The ITU has contracted with the local organizing committee to conduct the water-quality tests, and we trust the results," Shin Otsuka, executive board member of the International Triathlon Union, said through an interpreter. "The outcome of the testing has met the standards."
But "we are aware that at other bays and lakes (in Rio) that the virus situation is terrible," Otsuka said.
Athletes said that the conditions of the water appeared better than they were expecting. But water experts and the government's own pollution monitoring officials all note that sewage pollution typically isn't something that can be seen by the naked eye.
Because conditions of ocean waters tend to be volatile, it is difficult to determine just how much of a risk athletes faced swimming in the water on Friday, said David Zee, an oceanography professor at Rio's state university.
"The fluctuation depends on the tide. Every 12 hours we have a high tide and a low tide. For sure during high tide the water quality is much better than in the low tide," he said. Other factors such as winds, temperature and whether or not it rained recently can also affect water quality.
But "if the test was done and the water was considered unfit, without a doubt there's a certain risk."
The Rio de Janeiro state government and the state environmental agency in press releases blasted the AP report as being alarmist and said it was unfair to judge Rio's waters based on viral counts, limits of which are not designated in <a href="https://www.bing.com/search?q=brazil&amp;cvid=5d2e5966f2a1468683f33df519d199e2&amp;FORM=ANAB01&amp;PC=HCTS">Brazilian</a> legislation. They are also not set limits in the U.S. or the EU. The agency also questioned the qualifications of the laboratory where the AP samples were analyzed.
Zee, the oceanography professor, rejected the government's response, saying that in Brazil "it's natural that the authorities react saying that `everything is fine,' but everything is not fine." Triathletes Ignore Warnings And Swim In Polluted Rio Copacabana Beach Waters
Zee, who has long researched pollution in Guanabara Bay, added that the AP testing "was done in a trustworthy lab."
The area that was ruled unfit by the Rio environmental agency for swimming earlier this week was based levels of fecal coliforms, which are single-celled organisms that live in the intestines of humans and animals. Fecal coliforms can suggest the presence of cholera, dysentery, hepatitis A and typhoid.
Costa Rican triathlete Leonardo Chacon said he doesn't do anything differently to protect his body before going into the water in Rio, but plans to take anti-parasitic pills after he leaves to make sure he doesn't get sick. Those pills would not protect him against viruses.
With the Olympics a year away, he felt the risk was worth it.
"We know we are exposed to viruses, maybe to health problems later, but in my case, I have invested so much to prepare myself for this and I want this to happen because I can't recuperate this investment any other way other than competing and winning the points that I need to win."
---
Associated Press writers Jenny Barchfield and Brad Brooks contributed to this report.
---
Follow Brad Brooks on Twitter: <a href="http://www.twitter.com/bradleybrooks" target="_blank" rel="noopener noreferrer">http://www.twitter.com/bradleybrooks</a>
© 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.

Triathletes Ignore Warnings And Swim In Polluted Rio Copacabana Beach Waters

Triathletes Ignore Warnings And Swim In Polluted Rio Copacabana Beach...

Alaska's Scorched Landscape Proves Global Warming's Far-Reaching Effects. Some researchers say Alaska's especially hot wildfire season is proof of global warming's far reaching effects.

Alaska was on pace for a record-breaking year of wildfires, but an uptick in precipitation has cooled things.

Even if<a href="http://www.earth.com/image/fires-have-scorched-half-of-australias-fraser-island/"> fires</a> have died down in recent days, the evidence of the state's combustible summer is still readily apparent -- even from space.
<div class="ad_slot"></div>
A newly acquired false-color photo take by Operational Land Imager, the camera on NASA's Landsat 8 satellite, shows the damage done by the Tanana fires in central <a href="https://www.bing.com/search?q=alaska&amp;cvid=7a27a516b1e6498aa1f2dbab79615480&amp;FORM=ANAB01&amp;PC=HCTS">Alaska</a>.

Though recently quelled by rain, the Tanana fires burned for much of June, forcing the town's 300 residents to evacuate. As evidenced by the aerial image, the fires burned 496,000 acres. The flames' scar can be seen in brown. Alaska's Scorched Landscape Proves Global Warming's Far-Reaching Effects

No other group of fires accounted for so much damage. Of the nearly five million acres burned by wildfires in Alaska so far in 2015, the Tanana fires account for 10 percent of the damage.

Some researchers say Alaska's especially hot wildfire season is evidence of global warming's far reaching effects.

"Earlier in the spring, the state faced a record-breaking heat wave," NASA <a class="tpstyle" href="http://earthobservatory.nasa.gov/NaturalHazards/view.php?id=86311&amp;src=eorss-nh" target="_blank" rel="noopener noreferrer">officials wrote</a>in a blog post. "On average, Alaska has warmed by 3.4 degrees Fahrenheit (1.8 degrees Celsius) since the 1950s, about twice the national average."

Not only are the increasingly intense fires the result of global warming, researchers say, but they also may be facilitating the release of large amounts of sequestered carbon -- further exacerbating the greenhouse gas effect.

---

Credit: UPI

Alaska's Scorched Landscape Proves Global Warming's Far-Reaching Effects

Alaska's Scorched Landscape Proves Global Warming's Far-Reaching Effects. Some researchers...

City Trees In California Are Being Neglected During Drought. As Californians and the communities they live in cut back water use and let lawns turn brown, arborists and state officials are worrying about a potentially dangerous ripple effect: City trees going neglected and becoming diseased or even falling.

With cities ordered to reduce water use by 25 percent during the state's four-year drought, many residents are turning off sprinklers - not realizing that trees can be permanently damaged by a sudden reduction in the amount of water they receive.

"You don't want to be cutting back the water to the trees," said Ruben Green, an arborist with Evergreen Arborist Consultants in Los Angeles. "The tree can't adjust."

[caption id="attachment_2383329" align="alignleft" width="150"]<a href="http://cff1.greenatom.net/uploads/2015/08/01152016/trees-city-california-drought_2big_ap.jpg"><img class="size-thumbnail wp-image-2383329" src="http://cff1.greenatom.net/uploads/2015/08/01152016/trees-city-california-drought_2big_ap-150x150.jpg" alt="Volunteer attempting to save a city tree in California. Credit: AP" width="150" height="150" /></a> Volunteer attempting to save a city tree in California. Credit: AP[/caption]

Across the state, 12 million trees died over the past year due to lack of water, according to the U.S. Forest Service. While the bulk of those deaths occurred outside urban areas, conservationists and officials are now focusing on cities, where mandated water reductions are becoming visible in drying limbs and scorched leaves.

Fears that parched trees could pose a danger were heightened this week when a 75-year-old, 75-foot-tall pine tree fell on a group of kids from a camp at a Southern California children's museum, leaving a boy and girl hospitalized with serious injuries. An independent arborist and another from the city of Pasadena are conducting an investigation into the cause, which has not been determined to be drought-related.

Green visited the site of Tuesday's tree collapse and said it appeared unlikely the drought was to blame because the area around the tree looked well irrigated and its root system appeared compromised - a sign of rot, decay or injury, not necessarily the drought.

Still, the collapse highlighted concerns about the health of urban trees. Los Angeles alone has more than 25 square miles of parks and some 327,000 trees.

[caption id="attachment_2383330" align="alignleft" width="150"]<a href="http://cff1.greenatom.net/uploads/2015/08/01152023/trees-city-california-drought_3big_ap.jpg"><img class="size-thumbnail wp-image-2383330" src="http://cff1.greenatom.net/uploads/2015/08/01152023/trees-city-california-drought_3big_ap-150x150.jpg" alt="Dead city tree in California. Credit: AP" width="150" height="150" /></a> Dead city tree in California. Credit: AP[/caption]

Green and other arborists said they have seen an increase in the number of diseased trees in the city. As they get less water, they become more prone to illness caused by pests. In addition to bark beetles, Green has seen a newer pest drilling tunnels in the trunks of "dozens and dozens of trees."

Arborists say the number of falling trees and limbs does not appear to have risen in Los Angeles, but there are concerns that could be next. They also are worried that if a strong El Nino brings a wet California winter, already distressed trees will collapse when a storm hits.

"We're really right on the brink of starting to face more serious issues," said Cindy Blain, executive director of California ReLeaf, a nonprofit network of urban and community foresting groups around the state. "This is a critical time."

A new six-person crew removes potentially hazardous trees from Los Angeles parks. So far this year, it has moved out 550 trees - surpassing the 300 removed in an average year.

"They are starting to fail due to the drought, and we want to make sure these trees don't potentially pose a hazard to the public," said Laura Baurenfeind, principal forester with the city parks department.

Turf areas in city parks are being watered three times a week, down from at least five when drought regulations were not in place. To help nearby trees compensate, the city and nonprofits are installing makeshift basins to filter water to trees.

Meanwhile, a public education campaign is underway. California ReLeaf has partnered with Save Our Water, a coalition of the California Department of Water Resources and Association of California Water Agencies, to better inform residents about proper tree care during the drought.

Blain said many of the people she's spoken with say they have forgotten about their trees or gotten worried and began watering at the tree's base. Trees should be watered from the edge of their canopy.

If a tree goes too long without enough water, it will become unable to soak up liquid at all.

Like many Californians, Bruce Birkett has reduced lawn watering at his childhood home in Los Angeles in response to the drought. Recently, though, he's watched in grief as the giant cedar in the front yard became brittle and brown. City trees are going neglected and becoming diseased or even falling.

"That was hard," he said, "watching this lovely tree looking poor."

---

Follow Christine Armario on Twitter: http://www.twitter.com/cearmario .

© 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.

City Trees In California Are Being Neglected During Drought

City Trees In California Are Being Neglected During Drought. As...

City Trees In California Are Being Neglected During Drought. As Californians and the communities they live in cut back water use and let lawns turn brown, arborists and state officials are worrying about a potentially dangerous ripple effect: City trees going neglected and becoming diseased or even falling.

With cities ordered to reduce water use by 25 percent during the state's four-year drought, many residents are turning off sprinklers - not realizing that trees can be permanently damaged by a sudden reduction in the amount of water they receive.

"You don't want to be cutting back the water to the trees," said Ruben Green, an arborist with Evergreen Arborist Consultants in Los Angeles. "The tree can't adjust."

[caption id="attachment_2383329" align="alignleft" width="150"]<a href="http://cff1.greenatom.net/uploads/2015/08/01152016/trees-city-california-drought_2big_ap.jpg"><img class="size-thumbnail wp-image-2383329" src="http://cff1.greenatom.net/uploads/2015/08/01152016/trees-city-california-drought_2big_ap-150x150.jpg" alt="Volunteer attempting to save a city tree in California. Credit: AP" width="150" height="150" /></a> Volunteer attempting to save a city tree in California. Credit: AP[/caption]

Across the state, 12 million trees died over the past year due to lack of water, according to the U.S. Forest Service. While the bulk of those deaths occurred outside urban areas, conservationists and officials are now focusing on cities, where mandated water reductions are becoming visible in drying limbs and scorched leaves.

Fears that parched trees could pose a danger were heightened this week when a 75-year-old, 75-foot-tall pine tree fell on a group of kids from a camp at a Southern California children's museum, leaving a boy and girl hospitalized with serious injuries. An independent arborist and another from the city of Pasadena are conducting an investigation into the cause, which has not been determined to be drought-related.

Green visited the site of Tuesday's tree collapse and said it appeared unlikely the drought was to blame because the area around the tree looked well irrigated and its root system appeared compromised - a sign of rot, decay or injury, not necessarily the drought.

Still, the collapse highlighted concerns about the health of urban trees. Los Angeles alone has more than 25 square miles of parks and some 327,000 trees.

[caption id="attachment_2383330" align="alignleft" width="150"]<a href="http://cff1.greenatom.net/uploads/2015/08/01152023/trees-city-california-drought_3big_ap.jpg"><img class="size-thumbnail wp-image-2383330" src="http://cff1.greenatom.net/uploads/2015/08/01152023/trees-city-california-drought_3big_ap-150x150.jpg" alt="Dead city tree in California. Credit: AP" width="150" height="150" /></a> Dead city tree in California. Credit: AP[/caption]

Green and other arborists said they have seen an increase in the number of diseased trees in the city. As they get less water, they become more prone to illness caused by pests. In addition to bark beetles, Green has seen a newer pest drilling tunnels in the trunks of "dozens and dozens of trees."

Arborists say the number of falling trees and limbs does not appear to have risen in Los Angeles, but there are concerns that could be next. They also are worried that if a strong El Nino brings a wet California winter, already distressed trees will collapse when a storm hits.

"We're really right on the brink of starting to face more serious issues," said Cindy Blain, executive director of California ReLeaf, a nonprofit network of urban and community foresting groups around the state. "This is a critical time."

A new six-person crew removes potentially hazardous trees from Los Angeles parks. So far this year, it has moved out 550 trees - surpassing the 300 removed in an average year.

"They are starting to fail due to the drought, and we want to make sure these trees don't potentially pose a hazard to the public," said Laura Baurenfeind, principal forester with the city parks department.

Turf areas in city parks are being watered three times a week, down from at least five when drought regulations were not in place. To help nearby trees compensate, the city and nonprofits are installing makeshift basins to filter water to trees.

Meanwhile, a public education campaign is underway. California ReLeaf has partnered with Save Our Water, a coalition of the California Department of Water Resources and Association of California Water Agencies, to better inform residents about proper tree care during the drought.

Blain said many of the people she's spoken with say they have forgotten about their trees or gotten worried and began watering at the tree's base. Trees should be watered from the edge of their canopy.

If a tree goes too long without enough water, it will become unable to soak up liquid at all.

Like many Californians, Bruce Birkett has reduced lawn watering at his childhood home in Los Angeles in response to the drought. Recently, though, he's watched in grief as the giant cedar in the front yard became brittle and brown.

"That was hard," he said, "watching this lovely tree looking poor."

---

Follow Christine Armario on Twitter: http://www.twitter.com/cearmario .

© 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.

Poll: Americans Think Farmers Should Be First In Line For Water. When water gets scarce during drought and the government slaps restrictions on its use, who should be first in line at the spigot? Farmers, according to an Associated Press-GfK poll.
The national survey provides a glimpse into how Americans think water should be managed at a time when abnormally dry weather has afflicted swaths of the country, and water shortages in some states have led to conflict over who should get water and how much.
Two-thirds of Americans believe water is a limited resource that can be depleted if people use too much, the poll found, and 70 percent believe that government should restrict how much residents and businesses use when drought takes hold.
When asked to rate the importance of competing needs when water is scarce, 74 percent said agriculture should be a top or high priority, followed by residential needs (66 percent), <a href="http://www.earth.com/news/some-cat-owners-care-about-their-pets-impact-on-wildlife-conservation/">wildlife</a> and ecosystems (54 percent) and business and industry (42 percent).
To Cheryl Hendricks in parched California, it's simple: To put food on the table "we rely on agriculture."
"It's getting kind of serious when you are not giving water to people who are producing food," said Hendricks, 63, of Rancho Cucamonga, about 40 miles east of downtown Los Angeles.
She and her husband are taking shorter showers and removing lawn in response to California's four-year drought, but for growers and ranchers "it's more important for them to have it."
The poll's findings appear to run against criticism of farming practices that demand vast amounts of water. In California, for example, agriculture accounts for 80 percent of all water drawn from rivers, streams and the ground. Producing California's almond crop consumes more water than all the showering, dish-washing and other indoor household water use of the state's 39 million people.
The drought has been acute in <a href="https://www.bing.com/search?q=california&amp;cvid=4fd69f74e0224f609e1b1d382beee08f&amp;FORM=ANAB01&amp;PC=HCTS">California</a>, where rainfall has dipped to record lows, reservoirs are depleted and state regulators have ordered conservation from cities, businesses and agriculture. Some communities have been given nine months to cut their use by 36 percent compared to 2013 levels.
Nevada's Lake Mead, the largest reservoir in the country, is hovering near its historic low water mark and residents in the Las Vegas area have limits on lawn watering. In Oakridge in western Oregon, a community well is 23 feet below normal and restrictions prevent residents from washing cars and filling swimming pools.
"We need to take care of people first - and food," said William Clarke-Jessimy, 33, from Queens, New York, who thinks homes and agriculture should be favored for water rights.
He's watched prices spike for California fresh fruits and vegetables in his local markets, and he worries about friends and family in the San Francisco area who are living with the scarcity of water, with no relief in sight.
"It's really scary," he said. "They need to find ways to deal with the drought on a long-term basis. I don't think a lot of people realize how bad it really is."
Earlier this month, the House passed Republican-backed legislation designed to bring more water to California's farm belt. Republicans have blamed some cutbacks on environmental regulations designed to protect salmon and the threatened Delta smelt, a three-inch-long fish that is disappearing. California Democratic Sen. Dianne Feinstein has proposed spending $1.3 billion over a decade for reservoirs, desalination projects and water recycling.
According to the survey, Republicans are slightly more likely than Democrats to call water for agriculture a top priority, 81 percent to 74 percent, respectively. Democrats were more likely than Republicans to see water for wildlife and ecosystems as a top need, 61 percent to 49 percent.
There was little variation in regions around the nation in picking top priorities.
The poll also found most Americans - nearly 80 percent - think government should limit developers to building only in places with an adequate, long-term water supply.
The advocacy group Food &amp; Water Watch has urged Gov. Jerry Brown to place a moratorium on groundwater use for irrigating crops in some parts of the heavily farmed San Joaquin Valley. California director Adam Scow said the poll's findings reflect that people value food production but the group believes "we simply don't have the water" to support crops in some drought stricken regions.
David Abbott has witnessed the toll in his hometown.
The resident of Winton, California, in the heart of the state's Central Valley farm belt, has seen fields turn to dusty patches and farm workers end up jobless. Friends' wells have gone dry.
In California, farmers have seen allocations of water from rivers and reservoirs slashed by government agencies in amounts greater than at any other time in California history, forcing many to tap depleted groundwater sources or buy it at high prices.
Abbott, 27, a part-time college business professor, places home use and the needs of agriculture on about equal footing. For his part, he's watering less outdoors at home, has changed shower heads to conserve and waits to get a full load of dirty laundry before turning on the washing machine.
"I know it's hard when we don't have water," said Abbott, who lives amid farms and almond orchards. "They say we are going to have a real wet winter, but I don't think that's going to be enough."
---
The AP-GfK Poll of 1,004 adults was conducted online July 9-13, using a sample drawn from GfK's probability-based KnowledgePanel, which is designed to be representative of the U.S. population. The margin of sampling error for all respondents is plus or minus 3.4 percentage points.
---
Online:
AP-GfK Poll: <a href="http://www.ap-gfkpoll.com/" target="_blank" rel="noopener noreferrer">http://www.ap-gfkpoll.com</a>
© 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.

Poll: Americans Think Farmers Should Be First In Line For Water

Poll: Americans Think Farmers Should Be First In Line For...

Carbon Dioxide

Who Wins And Who Loses Under Obama's New Greenhouse Gas Plan? President Barack Obama is mandating even steeper greenhouse gas cuts from U.S. power plants than previously expected, while granting states more time and broader options to comply.
The tweaks to Obama's unprecedented greenhouse emissions limits on power plants, to be unveiled at the White House on Monday, aim to address a bevy of concerns raised by both environmentalist and the energy industry. The Environmental Protection Agency received more than 4 million public comments after Obama announced the proposed version last year, and opponents of the plan attempted unsuccessfully to stop it in <a href="http://www.earth.com/news/congress-moves-again-to-prevent-obama-from-protecting-water-quality/">Congress</a> and in the courts. Who Wins And Who Loses Under Obama's New Greenhouse Gas Plan?
Some of the changes Obama is making in the final version of the plan go even further in cutting the heat-trapping gases blamed for global warming. Other changes delay implementation and eliminate certain options that states could use to show they're cutting emissions, making it harder to comply.
All states are eagerly awaiting word of changes to the individual emissions reduction targets that Washington is assigning each state. Some states will be given a more lenient target than they were assigned under the proposed version, while others will have tougher targets to meet. The Obama administration has yet to disclose those state-specific targets.
A look at potential winners and losers in Obama's final plan:
WINNERS:
- ENVIRONMENTALISTS
To the delight of environmental groups, Obama tightened the emissions requirements in his final plan. That means power plants will have to attain an even lower level of carbon dioxide pollution to be in compliance. Obama's proposal from last year set the target as a 30 percent nationwide cut by 2030, compared to the levels in 2005. His revamped plan calls for a 32 percent cut in the same time period.
Left unchanged is Obama's overall goal for U.S. emissions cuts from all sources of pollution, including cars and trucks. As the U.S. commitment to a major global climate treaty that Obama is championing, the U.S. committed to cutting its emissions 26 percent to 28 percent by 2030, compared to 2005.
- PROCRASTINATING STATES
Many of the complaints directed at Obama's plan over the last year centered on the amount of time states would have to figure out how to meet their targets. Plans for how states will comply are technically due next year, but there's no penalty to asking for a two-year extension, so most states are expected to delay. Under the earlier plan, the rock-bottom deadline was 2017, but that's being pushed back to 2018.
And while states previously had until 2020 to achieve their targets, they'll now have an extra two years - until 2022.
- RENEWABLE ENERGY
Obama's revised plan relies more heavily on renewable energy sources like wind and solar replacing dirtier coal-fired power plants. Obama now wants the U.S. to get 28 percent of its power from renewables by 2030, compared to 22 percent in his earlier proposal.
In a new element, the administration now intends to offer pollution credits to states that drive up renewable energy generation in 2020 and 2021 ahead of the compliance deadline. States that invest early in wind and solar can store away those credits to offset pollution emitted after the compliance period starts in 2022.
LOSERS:
- YOUR POWER BILL
Although the administration predicts the plan will actually lower the average U.S. energy bill by almost $85 in 2030, companies that produce and distribute electricity aren't buying it. The savings come from increased use of wind, power and hydro plants, which operate at a cost of close to zero after they're installed. But acquiring and constructing renewable power sources is still very costly, making it less cost effective in many circumstances.
The National Association of Manufacturers, the American Coalition for Clean Coal Electricity, the National Mining Association, the American Energy Alliance and the National Rural Electric Cooperative Association all predicted the rule would drive electricity bills up.
- NATURAL GAS
The earlier version of Obama's plan sought to accelerate the ongoing shift from coal-fired power to natural gas, which emits far less carbon dioxide. But the final rule aims to keep the share of natural gas in the nation's power mix the same as it is now.
EPA Administrator Gina McCarthy said government estimates show renewable energy has ticked upward even since the rule was proposed last year, but that natural gas remained an important part of the U.S. energy mix.
- ENERGY EFFICIENCY
The tweaks eliminate an option for states to get credit for using efficiency programs to persuade energy consumers to use less power, one of the so-called "beyond the fence" measures to cut overall emissions that don't directly involve how power plants are operating. Because the administration is specifically regulating power plants under the Clean Air Act, the inclusion of such measures in the proposal raised concerns that they'd likely be invalidated in court.
Even so, McCarthy said U.S. energy statisticians are seeing significant and consistent reductions in the demand for energy in the U.S. The revised power plant rule does offer polluting credits to states that deploy energy efficiency programs in poorer communities.
---
Reach Josh Lederman on Twitter at <a href="http://twitter.com/joshledermanAP" target="_blank" rel="noopener noreferrer">http://twitter.com/joshledermanAP</a>
© 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.

Who Wins And Who Loses Under Obama's New Greenhouse Gas Plan?

Who Wins And Who Loses Under Obama's New Greenhouse Gas...

The World Glacier Monitoring Service, domiciled at the University of Zurich, has compiled worldwide data on glacier changes for more than 120 years. Together with its National Correspondents in more than 30 countries, the international service just published a new comprehensive analysis of global glacier changes in the Journal of Glaciology. In this study, observations of the first decade of the 21st century (2001-2010) were compared to all available earlier data from in-situ, air-borne, and satellite-borne observations as well as to reconstructions from pictorial and written sources.

The observed glaciers currently lose between half a metre and one metre of its ice thickness every year - this is two to three times more than the corresponding average of the 20th century», explains Michael Zemp, Director of the World Glacier Monitoring Service and lead author of the study. «Exact measurements of this ice loss are reported from a few hundred glaciers only. However, these results are qualitatively confirmed from field and satellite-based observations for tens of thousands of glaciers around the world.

Global glacier decline

According to the international author team, the current rate of glacier melt is without precedence at global scale, at least for the time period observed and probably also for recorded history, as indicated also in reconstructions from written and illustrated documents. In addition, the study shows that the long-term retreat of glacier tongues is a global phenomenon. Intermittent re?advance periods at regional and decadal scales are normally restricted to a subsample of glaciers and have not come close to achieving the Little Ice Age maximum positions reached between the 16th and 19th century. As such, glacier tongues in Norway have retreated by some kilometres from its maximum extents in the 19th century. The intermittent re-advances of the 1990s were restricted to glaciers in the coastal area and to a few hundred metres.

In addition, the study indicates that the intense ice loss of the past two decades has resulted in a strong imbalance of glaciers in many regions of the world. «These glaciers will suffer further ice loss, even if climate remains stable», explains Michael Zemp.

---

<a href="http://www.uzh.ch/" target="_blank" rel="noopener">University of Zurich</a>

Scientists: Global Glaciers Are Melting Faster Than Ever

The World Glacier Monitoring Service, domiciled at the University of...

Poll: Americans Think Farmers Should Be First In Line For Water During <a href="http://www.earth.com/news/corn-yields-in-the-u-s-have-become-more-sensitive-to-drought/">Drought</a>. When water gets scarce during drought and the government slaps restrictions on its use, who should be first in line at the spigot? Farmers, according to an Associated Press-GfK poll.
The national survey provides a glimpse into how Americans think water should be managed at a time when abnormally dry weather has afflicted swaths of the country, and water shortages in some states have led to conflict over who should get water and how much.
Two-thirds of Americans believe water is a limited resource that can be depleted if people use too much, the poll found, and 70 percent believe that <a href="https://www.bing.com/search?q=government&amp;cvid=c04638eb12ca42db82fb9c3eae592716&amp;FORM=ANAB01&amp;PC=HCTS">government</a> should restrict how much residents and businesses use when drought takes hold.
When asked to rate the importance of competing needs when water is scarce, 74 percent said agriculture should be a top or high priority, followed by residential needs (66 percent), wildlife and ecosystems (54 percent) and business and industry (42 percent).
To Cheryl Hendricks in parched California, it's simple: To put food on the table "we rely on agriculture."
"It's getting kind of serious when you are not giving water to people who are producing food," said Hendricks, 63, of Rancho Cucamonga, about 40 miles east of downtown Los Angeles.
She and her husband are taking shorter showers and removing lawn in response to California's four-year drought, but for growers and ranchers "it's more important for them to have it." Poll: Americans Think Farmers Should Be First In Line For Water During Drought
The poll's findings appear to run against criticism of farming practices that demand vast amounts of water. In California, for example, agriculture accounts for 80 percent of all water drawn from rivers, streams and the ground. Producing California's almond crop consumes more water than all the showering, dish-washing and other indoor household water use of the state's 39 million people.
The drought has been acute in California, where rainfall has dipped to record lows, reservoirs are depleted and state regulators have ordered conservation from cities, businesses and agriculture. Some communities have been given nine months to cut their use by 36 percent compared to 2013 levels.
Nevada's Lake Mead, the largest reservoir in the country, is hovering near its historic low water mark and residents in the Las Vegas area have limits on lawn watering. In Oakridge in western Oregon, a community well is 23 feet below normal and restrictions prevent residents from washing cars and filling swimming pools.
"We need to take care of people first - and food," said William Clarke-Jessimy, 33, from Queens, New York, who thinks homes and agriculture should be favored for water rights.
He's watched prices spike for California fresh fruits and vegetables in his local markets, and he worries about friends and family in the San Francisco area who are living with the scarcity of water, with no relief in sight.
"It's really scary," he said. "They need to find ways to deal with the drought on a long-term basis. I don't think a lot of people realize how bad it really is."
Earlier this month, the House passed Republican-backed legislation designed to bring more water to California's farm belt. Republicans have blamed some cutbacks on environmental regulations designed to protect salmon and the threatened Delta smelt, a three-inch-long fish that is disappearing. California Democratic Sen. Dianne Feinstein has proposed spending $1.3 billion over a decade for reservoirs, desalination projects and water recycling.
According to the survey, Republicans are slightly more likely than Democrats to call water for agriculture a top priority, 81 percent to 74 percent, respectively. Democrats were more likely than Republicans to see water for wildlife and ecosystems as a top need, 61 percent to 49 percent.
There was little variation in regions around the nation in picking top priorities.
The poll also found most Americans - nearly 80 percent - think government should limit developers to building only in places with an adequate, long-term water supply.
The advocacy group Food &amp; Water Watch has urged Gov. Jerry Brown to place a moratorium on groundwater use for irrigating crops in some parts of the heavily farmed San Joaquin Valley. California director Adam Scow said the poll's findings reflect that people value food production but the group believes "we simply don't have the water" to support crops in some drought stricken regions.
David Abbott has witnessed the toll in his hometown.
The resident of Winton, California, in the heart of the state's Central Valley farm belt, has seen fields turn to dusty patches and farm workers end up jobless. Friends' wells have gone dry.
In California, farmers have seen allocations of water from rivers and reservoirs slashed by government agencies in amounts greater than at any other time in California history, forcing many to tap depleted groundwater sources or buy it at high prices.
Abbott, 27, a part-time college business professor, places home use and the needs of agriculture on about equal footing. For his part, he's watering less outdoors at home, has changed shower heads to conserve and waits to get a full load of dirty laundry before turning on the washing machine.
"I know it's hard when we don't have water," said Abbott, who lives amid farms and almond orchards. "They say we are going to have a real wet winter, but I don't think that's going to be enough."
---
The AP-GfK Poll of 1,004 adults was conducted online July 9-13, using a sample drawn from GfK's probability-based KnowledgePanel, which is designed to be representative of the U.S. population. The margin of sampling error for all respondents is plus or minus 3.4 percentage points.
---
Online:
AP-GfK Poll: <a href="http://www.ap-gfkpoll.com/" target="_blank" rel="noopener noreferrer">http://www.ap-gfkpoll.com</a>
© 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.

Poll: Americans Think Farmers Should Be First In Line For Water During Drought

Scientists: Global Glaciers Are Melting Faster Than Ever. The World Glacier Monitoring Service, domiciled at the University of <a href="http://www.earth.com/image/water-hyacinths-have-invaded-the-valsequillo-reservoir/">Zurich</a>, has compiled worldwide data on glacier changes for more than 120 years. Together with its National Correspondents in more than 30 countries, the international service just published a new comprehensive analysis of global glacier changes in the Journal of Glaciology. In this study, observations of the first decade of the 21st century (2001-2010) were compared to all available earlier data from in-situ, air-borne, and satellite-borne observations as well as to reconstructions from pictorial and written sources.

The observed glaciers currently lose between half a metre and one metre of its ice thickness every year - this is two to three times more than the corresponding average of the 20th century», explains Michael Zemp, Director of the World Glacier Monitoring Service and lead author of the study. «Exact measurements of this ice loss are reported from a few hundred glaciers only. However, these results are qualitatively confirmed from field and satellite-based observations for tens of thousands of glaciers around the world.

Global glacier decline

According to the international author team, the current rate of glacier melt is without precedence at global scale, at least for the time period observed and probably also for recorded history, as indicated also in reconstructions from written and illustrated documents. In addition, the study shows that the long-term retreat of glacier tongues is a global phenomenon. Intermittent re?advance periods at regional and decadal scales are normally restricted to a subsample of glaciers and have not come close to achieving the Little Ice Age maximum positions reached between the 16th and 19th century. As such, glacier tongues in Norway have retreated by some kilometres from its maximum extents in the 19th century. The intermittent re-advances of the 1990s were restricted to glaciers in the coastal area and to a few hundred metres.

In addition, the study indicates that the intense ice loss of the past two decades has resulted in a strong imbalance of glaciers in many regions of the world. «These glaciers will suffer further ice loss, even if climate remains stable», explains Michael Zemp.

---

<a href="http://www.uzh.ch/" target="_blank" rel="noopener noreferrer">University of Zurich</a>

Scientists: Global Glaciers Are Melting Faster Than Ever. The World...

Obama Orders Steeper Greenhouse Gas Cuts For Power Plants. President Barack Obama's sweeping new power plant regulations are thrusting the divisive debate over climate change into the race for the White House, with candidates in both parties seeing an opportunity to capitalize.
To Democrats, rallying around global climate change is a way to energize liberal supporters and paint Republicans as out of touch with the majority of Americans. To the <a href="http://www.earth.com/organizations/gopetition-com/">GOP</a>, Obama's executive actions to curb greenhouse gas emissions are burdensome to business and block job creation, an argument targeting Americans' worries about the economy. Obama Orders Steeper Greenhouse Gas Cuts For Power Plants
The president unveiled the plan at the White House Monday, calling it the "single most important step" the U.S. has taken to combat a major global threat.
Broad support for the rules by Democratic candidates and universal opposition from Republicans puts the parties' eventual nominees on a general-election collision course. Most of the changes Obama outlined would have to be implemented by the next president, if the rules survive court challenges.
Republicans gave little indication of what they would do differently to curb emissions from U.S. power plants, if anything at all. They cast the measure requiring states to cut carbon dioxide emissions by 32 percent by 2030 as unnecessary and costly White House overreach that will raise energy costs for Americans.
The Obama administration itself estimated the emissions limits will cost $8.4 billion annually by 2030, though the actual price won't be clear until states decide how they would reach their targets.
Wisconsin Gov. Scott Walker, a Republican, said the regulations would be an economic "buzz saw" that would "cost hard-working Americans jobs and raise their energy rates." Jeb Bush, the former GOP governor of Florida, said the rules "run over state governments, will throw countless people out of work and increases everyone's energy prices."
Texas Republican Sen. Ted Cruz questioned whether climate change is really occurring.
"I'm saying the data and facts don't support it," Cruz said at a retreat sponsored by billionaire brothers Charles and David Koch, heavily courted donors who strongly oppose Obama's climate change agenda.
The issue has also fueled the fundraising race for Democrats. Billionaire environmentalist Tom Steyer dropped $74 million into the 2014 midterm elections for candidates who support policies to curb climate change. Despite such spending, Democrats gave up control of the Senate, lost seats in the House and suffered embarrassing defeats in gubernatorial races.
Steyer hosted a fundraiser earlier this year for Hillary Rodham Clinton, the front-runner for the Democratic nomination. Clinton called Obama's power plant measure a "significant step forward" and said she would defend it if elected president. Her Democratic challengers were similarly supportive.
Power plants account for roughly one-third of all U.S. emissions of the heat-trapping gases blamed for global warming, making them the largest single source. Obama has already used executive actions to curb greenhouse gas emissions from other major sources, including cars and trucks.
Building on Obama's aggressive actions, Democrats have cast climate change as one in a long list of issues - along with gay marriage, immigration and diplomatic relations with Cuba - where Republicans are out of step with the majority of Americans. A Washington Post/ABC News poll conducted in March showed 59 percent of Americans said they'd like the next president to be someone who favors government action to address climate change, while 31 percent would prefer someone who opposes it.
Dan Pfeiffer, a longtime Obama adviser, said climate change is also a "litmus test" for many of the young voters who backed the president in the 2008 and 2012 elections. Some Democrats fear Clinton, if she wins the nomination, will struggle to replicate the high turnout among young people and minorities that helped propel Obama into the White House.
"They see candidates who deny the science as relics from the past not worthy of their support," said Pfeiffer, who left the White House earlier this year. "Motivating the younger voters that were core to the Obama coalition will be one of the biggest tasks for the Democrats in 2016 and climate change is one the best issues to get them to the polls."
According to the Washington Post/ABC News poll, 64 percent of adults between ages 18-39 said they'd prefer the next president to favor action to address climate change, compared with 49 percent of those over 65. However, an Associated Press-NORC Center for Public Affairs and Yale University poll late last year found that younger Americans didn't hold significantly different views from older Americans on government regulation of carbon dioxide emissions.
---
AP News Survey Specialist Emily Swanson in Washington and AP writer Julie Bykowitz in Dana Point, Calif., contributed to this report.
---
Follow Julie Pace at <a href="http://twitter.com/jpaceDC" target="_blank" rel="noopener noreferrer">http://twitter.com/jpaceDC</a>
© 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.

Obama Orders Steeper Greenhouse Gas Cuts For Power Plants

Obama Orders Steeper Greenhouse Gas Cuts For Power Plants. President...

The Ocean Legacy Of Greenhouse Gases. Continuing current carbon dioxide (CO2) emission trends throughout this century and beyond would leave a legacy of heat and acidity in the deep ocean. These changes would linger even if the atmospheric carbon dioxide concentration were to be restored to pre-industrial levels at some point in the future, according to a new Nature Climate Change paper from an international team including Carnegie's Ken Caldeira. This is due to the tremendous inertia of the ocean system.

Greenhouse gases emitted by human activities not only cause rapid warming of the seas, but also an unprecedented rate of ocean acidification. Ocean acidification occurs when atmospheric carbon dioxide is absorbed by the ocean and forms carbonic acid, inhibiting coral reef growth and threatening marine life. The Ocean Legacy Of Greenhouse Gases

Some experts propose that climate and chemical damage due to high levels of greenhouse gases could be avoided by removing active carbon dioxide from the atmosphere, processes broadly called CDR for carbon dioxide removal. One idea is that fast-growing trees such as poplars, which consume a great deal of carbon dioxide during growth, could be farmed and then burned in bioenergy plants where their carbon dioxide would captured and stored underground instead of released back into the atmosphere. However, none of the proposed removal-and-storage strategies have been proven at an industrial scale yet, and ideas such as poplar farming would have to be carefully balanced against land use for food production.

Using computer modeling to investigate the success of CDR strategies, the team discovered that the clock is ticking for CDR to substantially reduce risks to much marine life. If these processes are applied too late, they might as well not be applied at all, as far as ocean acidification is concerned, the team found.

"Geoengineering measures are currently being debated as a kind of last resort to avoid dangerous climate change--either in the case that policymakers find no agreement to cut CO2emissions, or to delay the transformation of our energy systems," said lead-author Sabine Mathesius from GEOMAR Helmholtz Centre for Ocean Research Kiel and the Potsdam Institute for Climate Impact Research (PIK). "However, looking at the oceans we see that this approach carries great risks."

As policymakers consider what might occur if various near- to mid-term climate policy targets are not achieved, it becomes increasingly important to understand what happens if society exceeds these targets.

"If we overspend our carbon dioxide emission budget now, can we make up for it by paying back a carbon dioxide debt later?" asked Caldeira, who worked on this issue during a research stay at PIK. "Can later carbon dioxide removal from the atmosphere offset today's emissions?"

The team conducted a computer experiment and simulated different rates of carbon dioxide extraction from the atmosphere. One of these rates, 22 billion tons per year, would remove carbon dioxide at slightly more than half current emission rates. Another was the probably unfeasible rate of more than 90 billion tons per year, which is more than two times today's yearly emissions. The experiment did not account for the availability of technologies for extraction and storage.

"Interestingly, it turns out that after business-as-usual until 2150, even taking such enormous amounts of carbon dioxide from the atmosphere would not help life that exists deep in the ocean very much. After large-scale ocean circulation has transported acidified water to great depths, it is out of reach for many centuries, no matter how much carbon dioxide is removed from the atmosphere," Caldeira said.

The scientists' model also looked at increasing temperatures and decreasing concentrations of dissolved oxygen in the sea. Oxygen is, of course, vital for many creatures. The warming reduces ocean circulation, harming nutrient transport. Together with acidification, these changes put heavy pressures on marine life. Earlier in Earth's history, such changes have led to mass extinctions. However, the combined effect of all three factors has not yet been fully understood.

"In the deep ocean, the chemical echo of this century's CO2 pollution will reverberate for thousands of years," said co-author John Schellnhuber, director of PIK. "If we do not implement emissions reductions measures in line with the 2 degrees Celsius target in time, we will not be able to preserve ocean life as we know it."

---

<a href="http://www.ciw.edu/">Carnegie Institution</a>

The Ocean Legacy Of Greenhouse Gases

The Ocean Legacy Of Greenhouse Gases. Continuing current carbon dioxide...

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Today’s Video of the Day from <a href="https://www.igb.illinois.edu/">Carl R. Woese Institute for Genomic Biology</a> reveals how scientists can modify common crops like soybean, rice, and wheat to protect them from heat stress.



“We need to double crop production by 2050 to feed a growing global population, and not only are we not on track to do that, but climate change is further complicating things,” said Amanda Cavanagh, a lecturer at the University of Essex. 



The study is part of Realizing Increased Photosynthetic Efficiency (RIPE), an international research project that aims to develop food crops that turn the sun’s energy into food more efficiently.



“Using an engineering approach we designed multiple alternative metabolic pathways to photorespiration. Testing them in the field showed increases in productivity which led Amanda to significantly move the project forward by showing our engineered plants can withstand pretty extreme temperature stress,” said study co-author and RIPE researcher Paul South.&nbsp;



“As the climate changes and temperature stresses increase the pressure on our global food supply, farmers will need every tool available including engineering approaches like the synthetic biology used here to maintain safe and productive harvests.”



The experts tested plants modified to have more efficient photorespiration to see if they were better adapted to warmer temperatures.&nbsp;



The team found that the engineered plants produced 26 percent more biomass than the wild-type plants exposed to the same temperatures, and had 15 percent less yield loss under the higher temperatures.



Video Credit: Amanda Nguyen/University of Illinois



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Designing crops that can beat the heat

[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"] Today’s Video of the Day from Carl...

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes the first comprehensive estimate of carbon density in the Saharan, Sahel, and Sudanian zones of Africa. In an effort to measure the amount of carbon stored across these drylands, a team of scientists used high-resolution satellite images and artificial intelligence to map nearly 10 billion individual trees. 



"The high spatial resolution (50 cm) combined with AI and field measurements used in this study is key to improving tree inventories in drylands," said Pierre Hiernaux, a French researcher working for NASA. "The ever-increasing availability of very high-resolution satellite imagery will make it possible to assess carbon pools and their dynamics at the individual tree level on a global scale."



"This study is exceptional because it is pioneering a type of approach that will revolutionize the monitoring of trees and forests on a global scale: in the short term, it will be possible to map the world's trees from the centre of the Amazon to our schoolyards," said <a href="https://www.inrae.fr/en">INRAE</a> researcher Jean-Pierre Wigneron.



"Many fields of application will become much more efficient and accurate, such as tracking carbon stocks, biodiversity, monitoring logging and protection against illegal forest degradation, in near real time.”



Video Credit: NASA Goddard&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Remote sensing will revolutionize the way we monitor trees

[sendtonews key="EjmSP20gQK-2593093-12187" type="single"] Today's Video of the Day from NASA...

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Lesotho: Africa's "Kingdom in the Sky" Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features northwest Lesotho in South Africa.



According to ESA, Lesotho is the only nation in the world that lies completely above 1,000 m in elevation. The country is famous for its tall mountains and narrow valleys, and is known as Africa's "Kingdom in the Sky."



Out of a population of around two million people, about 80 percent live in rural areas. More than 75 percent of these people are engaged in <a href="https://www.earth.com/news/climate-change-will-have-a-global-impact-on-agriculture/">agriculture</a>, including rainfed cereal production and animal grazing.&nbsp;



ESA reports that the country’s agricultural system faces a growing number of issues, with climate-related vulnerabilities such as drought, floods and extreme temperatures occurring more frequently. 



Diamonds are amongst the minerals found in the mountains. Indeed, Lesotho can truly be called the Kingdom in the Sky. Beautiful, culturally rich, safe, affordable, and easily accessible from Durban and Johannesburg, mountainous Lesotho is a vastly underrated travel destination. the Kingdom of Lesotho (Sotho: 'Muso oa Lesotho) is an enclaved country in southern Africa. It is just over 30,000 km2 (11,583 sq mi) in size and has a population of around 2 million.



Video Credit: ESA&nbsp;&nbsp;



---



By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer 



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Lesotho: Africa's "Kingdom in the Sky"

[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"] Lesotho: Africa's "Kingdom in the Sky" Today’s...

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> features a visual dataset of.methane emissions from wetlands across the globe. Atmospheric methane levels have reached record highs in recent years, and wetlands are a major source of these emissions.&nbsp;



"Methane is an important greenhouse gas that contributes substantially to global warming. On a molecule by molecule basis, methane is much more efficient at trapping heat than carbon dioxide, the main driver of warming," says NASA.



"Though human activities, including agriculture, oil and natural gas production and use, and waste disposal, collectively contribute the majority of methane to the atmosphere, about a third of total methane emissions comes from wetlands."&nbsp;



According to NASA, understanding methane emissions from wetlands and other natural sources is critically important for scientists and policymakers who are working to combat climate change by reducing emissions from human activities.



Video Credit: NASA Goddard



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Wetlands are a major source of methane emissions

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> reveals the evolution of the Columbia Glacier in southeastern Alaska. Columbia is among the fastest shrinking glaciers in the world, and the video documents its rapid retreat over the years.&nbsp;



Columbia Glacier is a large, multi-branched calving glacier that flows out of the Chugach Mountains to the Prince William Sound.&nbsp;



According to USGS, Columbia had a long history of stability prior to 1980, with a length 41 miles, and small, short-lived advances or retreats.



In the years since 1980, however, satellite images have captured Columbia’s alarming retreat. By using false-color images, scientists can distinguish between snow and ice, open water, vegetation, and rocky debris on the glacier’s surface.



The series of false-color images featured in today's video were acquired over the span of 35 years. You can see that by 2021, the glacier’s main branch had retreated about 15 miles from its initial position.



The Columbia Glacier has also lost more than 50 percent of its volume, mostly due to calving. <a href="https://www.earth.com/video/nasa-reveals-3d-visual-of-an-atmospheric-river/">NASA</a> reports that while climate change likely started the retreat, mechanical processes kept the disintegration going.



The NASA images are provided by Jesse Allen, Robert Simmon, Joshua Stevens, and Lauren Dauphin using data from Landsat satellites, from the U.S. Geological Survey, and data from MODIS on NASA’s Terra satellite. The structure of Columbia’s moraine played a large role in the stability of the glacier before 1980. 



Like other tidewater glaciers, the Columbia built up a moraine over time, and the mixture of ice and rock functioned like a dam keeping out the sea. It was supported on one end by the shoreline and by the underwater terminal moraine at the other.



Video Credit: NASA Earth Observatory/&nbsp; NASA’s Scientific Visualization Studio



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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The rapid retreat of the Columbia Glacier

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes how record-breaking heat expressed itself around the world in 2022.



Scientists have determined that 2022 was the 5th warmest year since 1880. Furthermore, the last nine consecutive years have been the warmest on record.



From devastating floods and wildfires to natural disasters like Hurricane Ian, 2022 showed us yet again how a warming climate affects people across the globe.&nbsp;



"As we look back at 20:22 and years past, we see that each year we better understand the challenges we face and how important it is to meet them," says NASA.



Video/ Image Credit: NASA Goddard



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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2022 illustrated the consequences of a warming climate

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Satellites reveal how Earth's systems are interconnected Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes Earth’s interconnected systems, and how this network is affected by rising temperatures.&nbsp;



During 2020, average global temperatures matched the hottest year on record. The hurricane season was also record-breaking, with many of the storms intensifying at extraordinary speeds. Hot water in the ocean is fuel for hurricanes. The satellite data shows that it's all one interconnected system showing how Satellites reveal how Earth's systems are interconnected.



According to NASA, dust swept up from Northern Africa plays a major role in the formation of hurricanes, and is also a key source of fertilization in the Amazon rainforest. As a result of<a href="https://www.earth.com/news/seagrass-wasting-disease-is-fueled-by-climate-change/"> climate</a> change, dust plumes are expected to decline, which will have an effect on vegetation far away.&nbsp;



Images from Earth-observing satellites show how the world’s plant life is affected by natural disasters, fires, and deforestation. Satellites also reveal how widespread changes in vegetation impact waterways,&nbsp; the climate, air quality. Satellites communicate by using radio waves to send signals to the antennas on the Earth. "Earth From Space" is a groundbreaking two-hour special that reveals a spectacular new space-based vision of our planet. 



Video Credit: NASA Goddard&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Satellites reveal how Earth's systems are interconnected

[sendtonews key="JbW4VsY53O-1632195-12187" type="single"] Satellites reveal how Earth's systems are interconnected...

Today’s Video of the Day from the <a href="https://welcome.miami.edu/">University of Miami</a> Rosenstiel School of Marine and Atmospheric Science explores how changes in water temperatures have affected tiger shark habitats and movements in the North Atlantic Ocean. The study reveals that rising temperatures have caused the sharks to shift toward the poles over the past 40 years.



“Tiger shark annual migrations have expanded poleward, paralleling rising water temperatures,” explained study lead author Neil Hammerschlag. “These results have consequences for tiger shark conservation, since shifts in their movements outside of marine protected areas may leave them more vulnerable to commercial fishing.”



The researchers analyzed nine years of tracking data from satellite-tagged tiger sharks, combined with four decades of conventional tag and recapture data provided by National Oceanic and Atmospheric Administration (NOAA) Cooperative Shark Tagging Program.



The experts found that during the last decade of record heat, for every one-degree Celsius increase in water temperatures, tiger sharks migrated further poleward by over 400 kilometers. They also migrated two weeks earlier than usual to waters off the northeastern coast of the United States.



“Given their role as apex predators, these changes to tiger shark movements may alter predator-prey interactions, leading to ecological imbalances, and more frequent encounters with humans,” concluded Professor Hammerschlag.



Video Credit: University of Miami Rosenstiel School of Marine and Atmospheric Science



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Tiger sharks are shifting poleward as temperatures rise

Today’s Video of the Day from the University of Miami...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> is focused on the melt ponds that emerge during the spring and summer on the Greenland Ice Sheet, which is the largest ice mass in the northern hemisphere.



"Melt ponds are vast pools of open water that form on both sea ice and ice sheets and are visible as turquoise-blue pools of water in this Copernicus Sentinel-2 image," says ESA.



"When snow and ice melts atop glaciers, water flows in channels and streams and collects in depressions on the surface. These melt ponds can speed up the melting of the surrounding ice since they greatly reduce the ice’s ability to reflect sunlight."



"This can create a positive feedback where an increasing number of melt ponds absorb more heat which causes ice cover to melt even faster."



According to ESA, Greenland has been hit with a late-season heatwave that began in early September. This caused the type of melt event that usually occurs in the middle of summer.



"In a recent paper published in Nature Climate Change, scientists found that major sea-level rise from the melting of the Greenland ice cap is now ‘inevitable’ even if the burning of fossil fuels were to halt overnight," says ESA. "Using satellite observations of Greenland ice loss and ice cap from 2000 to 2019, the team found the losses will lead to a minimum rise of 27 cm regardless of climate change."



Video Credit: ESA&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Melt ponds on the Greenland Ice Sheet

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes how Earth is unique in our solar system for its ability to sustain liquid water on its surface. But now, the water cycle is shifting as the climate warms, and scientists must find ways to predict how these changes will affect water availability.



Overall, 96 percent of Earth's water is saltwater, and nearly all of freshwater is found in ice and groundwater. These sources of water are linked as it passes through solid, liquid and gas phases.



In a warmer climate, the water cycle will be transformed. It will be easier for water to evaporate and form clouds, and storms will become more frequent and intense. Some regions will get too much water, while others will be left without enough water. In addition, soil moisture will be lost - which threatens food security.



Scientists are using satellite data from over the last 40 years to track changes that are happening in the water cycle. This will ultimately help us prepare for extreme events and better manage our water resources, according to ESA.



Video Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Tracking changes in Earth's water cycle

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Saturn,-,High,Resolution,3d,Images,Presents,Planets,Of,The

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard Space Flight Center</a> features images of Saturn from NASA’s Hubble Space Telescope. The photographs capture the start of the mysterious "spoke season" on Saturn - when unexplained features appear on its rings. 



According to NASA, both the cause of the spokes and their seasonal variability have yet to be fully explained by planetary scientists.



"Like Earth, Saturn is tilted on its axis and therefore has four seasons, though because of Saturn's much larger orbit, each season lasts approximately seven Earth years. Equinox occurs when the rings are tilted edge-on to the Sun," explains NASA.



"The spokes disappear when it is near summer or winter solstice on Saturn. (When the Sun appears to reach either its highest or lowest latitude in the northern or southern hemisphere of a planet.) As the autumnal equinox of Saturn's northern hemisphere on May 6, 2025, draws near, the spokes are expected to become increasingly prominent and observable."



Experts believe that the spokes may be a product of the planet's variable magnetic field. When magnetic fields interact with solar wind, an electrically charged environment is created. This phenomenon is visible on Earth as the northern lights.&nbsp;



"Scientists think that the smallest, dust-sized icy ring particles can become charged as well, which temporarily levitates those particles above the rest of the larger icy particles and boulders in the rings," says NASA.



The spokes were first observed in the early 1980s by NASA's Voyager mission. Depending on the angle of the rings, the spokes can appear dark or light.



"Thanks to Hubble's OPAL program, which is building an archive of data on the outer solar system planets, we will have longer dedicated time to study Saturn’s spokes this season than ever before," said NASA senior planetary scientist Amy Simon, head of the Hubble Outer Planet Atmospheres Legacy (OPAL) program.



"Despite years of excellent observations by the Cassini mission, the precise beginning and duration of the spoke season is still unpredictable, rather like predicting the first storm during hurricane season."



Video Credit: NASA Goddard&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Mysterious "spoke season" captured on Saturn

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Closeup,Of,Fresh,Green,The,Napier,Bush,Grass,As,Animal

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Today’s Video of the Day from <a href="http://www.ntu.edu.sg/">NTU Singapore</a> reveals that some plants can remove toxic heavy metals from soil.&nbsp;



The researchers analyzed samples of various tropical plant species to test for levels of heavy metals and metalloids. The study showed that there are existing plants with high levels of these contaminants, which means that these species are great candidates for drawing pollutants out of the soil.&nbsp;



Among the plants examined in the study, 12 species had accumulated several types of heavy metals and metalloids. These plants are widely available, including species that are native to Singapore.



“In a small nation like Singapore, land may be repurposed to support new development plans, so it is important that we have a green and sustainable way to remediate land that is contaminated," said Professor Lam Yeng Ming.



"We set out to uncover how to better make use of tropical plants to do phytoremediation and through advanced characterization techniques, we showed how some of these tropical plant species can be an environmentally friendly and literally a 'green' way to remove contaminants in soil."&nbsp;



"Phytoremediation also has benefits of cost effectiveness, simplicity of management, aesthetic advantages, and long-term applicability and sustainability. The strategy prevents erosion and metal leaching by stabilizing or accumulating heavy metals, so that helps reduce the risk of contaminant spread.”



Video Credit: NTU Singapore



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Plants help remove heavy metals from contaminated soil

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Today’s Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes why herbicides are not as effective in killing weeds anymore. In the 20th century, chemical companies developed thousands of herbicides. The most commonly used herbicide was glyphosate, which was introduced in 1974.



Over the past few decades, dozens of species of weeds have evolved resistance to glyphosate. Depending on the site of action, the part of the plant that an herbicide interacts with, weeds may even be resistant to herbicides that have not been developed yet.&nbsp;



With increasing resistance to glyphosate and other herbicides, weeds are - once again - becoming a major concern for farmers.&nbsp;



Video Credit: American Chemical Society&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Weeds are becoming increasingly resistant to herbicides

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Today’s Video of the Day from the <a href="https://www.jpl.nasa.gov/">NASA Jet Propulsion Laboratory</a> (JPL) describes a dust storm on Mars that was nearly twice the size of the United States. As the storm covered the southern hemisphere of the planet, some of NASA’s explorers had to delay their normal activities.



NASA’s Insight lander put itself in a "safe mode" for 11 days to conserve battery power because solar power was disrupted by the dust. The Ingenuity Mars Helicopter postponed flights until conditions improved.



"A fleet of NASA orbiters monitor Martian dust storms like this one and serve as lifelines to Earth by relaying data from the rovers and lander on the ground back to the team. This includes the Mars Reconnaissance Orbiter, MAVEN, and Odyssey," reports JPL.



"Dust storms like this recent one start close to the ground and are spread by wind as they rise – warming the cold Martian atmosphere."



The images in the video were captured by NASA’s Curiosity as the dust rolled in. A fleet of orbiters monitored the dust storm from above, relaying data from Mars’ explorers back to scientists on Earth.



Video &amp; Image Credit: NASA/JPL-Caltech/ASU/MSSS



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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NASA monitors giant dust storms on Mars

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Today's Video of the Day from the <a href="http://www.esa.int/">European Space Agency</a> features Qeshm Island in the Strait of Hormuz. This strait provides the only sea passage from the Persian Gulf to the open ocean.



Qeshm is separated from the Iranian coast by the Clarence Strait, also known as Khuran.&nbsp;The Hara Forest Protected Area is a network of shallow waterways and forest located between the island and the mainland. This protected region is home to sea turtles, snakes, and more than 150 species of migrating birds.



Qeshm is famous for its wide range of&nbsp;ecotourist&nbsp;attractions, such as the&nbsp;Hara marine forests. According to environmentalists, about 1.5 percent of the world birds and 25 percent of Iran's native <a href="https://www.earth.com/news/female-hummingbirds-avoid-sexual-harassment-by-looking-like-males/">birds</a> annually migrate to the forests, which are the first national geo park in Iran.



Tourists are also drawn to the island to see an age-old Portuguese&nbsp;fort, historic mosques, the&nbsp;Seyyed Mozaffar&nbsp;and&nbsp;Bibi Maryam&nbsp;shrines, and the "Valley of Stars."



The average temperature on the island is 81 degress and the region is often hot and humid. From June to August, the island is described as being oppressively hot. The ideal time to visit is during the winter season. 



Video Credit: ESA&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Qeshm Island in the Strait of Hormuz

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Inhambane Bay in southeast Mozambique.&nbsp;



"Inhambane Bay is a deep inlet into which the small Mutamba River flows," says ESA. "On one side of the bay lies the historical city of Inhambane, capital of the Inhambane Province, while the sister city of Maxixe, the economic capital of Inhambane, sits across from it. The province is the second largest grower of cashews, after Nampula, and it also produces coconut and citrus fruits."



The beaches of Barra and Tofo are popular with tourists. There are also coral reefs along the long coastline of Inhambane, making it an ideal destination for scuba diving and snorkeling.



"Mozambique’s extensive coastline heightens the country’s vulnerability to tropical cyclones that develop in the Indian Ocean as well as storm surge flooding," says ESA.



"More than half of the population lives in low lying coastal areas, putting communities at risk. Inhambane Bay was dangerously close to where Cyclone Idai made landfall in 2019 causing widespread destruction to the country."



Video/ Image Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Inhambane Bay in southeast Mozambique

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency </a>&nbsp;features the Kangerlussuaq Glacier, one of the largest tidewater outlet glaciers in Greenland. The glacier is located on the east coast of the Greenland ice sheet.



As human-induced climate change continues to drive up temperatures, global ice loss is accelerating at an alarming rate. ESA reports that, over the past decade alone, 3.5 trillion tons of ice have melted from the Greenland ice sheet. This is enough to cover the UK with meltwater 15 meters deep.



Based on satellite imagery, researchers determined that Kangerlussuaq entered a new phase of rapid retreat and acceleration in 2017. In their study, published in <a href="https://www.frontiersin.org/articles/10.3389/feart.2019.00123/full">Frontiers in Earth Science</a>,&nbsp; the experts report that the glacier's ice front is now at its most retreated position since the early 20th century.



"Given Kangerlussuaq’s previous impacts on both the magnitude and pattern of ice sheet wide mass loss, we predict that its new phase of retreat, acceleration and thinning will markedly enhance the south-east region’s contribution to increasing discharge from the ice sheet," wrote the study authors.&nbsp;&nbsp;



"More broadly, accurate forecasting of the ice sheet’s contribution to sea level rise will require a deeper understanding of, and responses to, these non-linear ice dynamic processes."



Video Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Kangerlussuaq Glacier on the Greenland ice sheet

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes the complex relationship between ocean and climate. ESA's Climate Change Initiative will help us understand how oceans influence the climate and how climate change is impacting the oceans.&nbsp;



"Earth’s oceans are huge heat stores, soaking up 93% of the excess heat from human activity over the past 70 years. Ocean currents redistribute heat around the planet, from the Equator to the poles. Where this ocean heat goes influences weather patterns and regional climate," explains ESA.



"As well as absorbing heat, oceans are a natural carbon sink, absorbing a quarter of carbon dioxide emissions from human activity. This has led to the acidification of ocean water, threating marine life."



The amount of heat and carbon dioxide soaked up by the ocean depends on specific variables, including phytoplankton, temperatures, waves, salinity, and ice cover. Satellites can be used to measure these variables from space.



"From their unique vantage point, satellites provide key information for understanding the complexities of our planet and monitoring environmental issues," says ESA.



Video Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Ocean heat influences regional climate

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes the importance of monitoring the shape of the sea surface, which is constantly changing. These observations have many applications, such as ship routing, <a href="https://www.earth.com/news/the-modem-ocean-is-a-tough-place-for-whales-to-survive/">ocean</a> current forecasting, and debris tracking.



"A project supported by the Discovery element of ESA’s Basic Activities recently investigated a new technique to measure sea surface topography very precisely," reports ESA.



"The technique involves looking at satellite navigation (GNSS) signals that have been reflected off of the sea surface at very low angles. At these so-called grazing angles, waves and surface roughness have very little impact on the reflection process; the sea surface acts as a very smooth mirror."



Estel Cardellach is the principal investigator at the Institute for Space Studies of Catalonia, who first submitted the idea for the project.



“In a mirror-like reflection the phase of the signal can be tracked – it is continuous," said Cardellach. "Different surface heights result in different phase measurements. It gives a very precise measurement of the surface altitude at a few centimetres’ precision.”



The researchers developed a GNSS receiver and set up an experiment in the Balaeric Islands to collect signals from the receiver that were reflected off the sea surface. Ultimately, these signals will provide improved measurements of the shape of the sea surface.



Image/ Video Credit: ESA



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Monitoring the dynamic shape of the sea surface

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Aerial,Photo,Of,River,In,Amazon,Rainforest,Jungle,In,Peru

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Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA’s Goddard Space Flight Center</a> describes how scientists are using autonomous sound sensors to monitor deforestation in the Amazon. By recording soundscapes, the experts can determine which animals are present through their distinct sounds.&nbsp;



Using this method, sounds can be used as scientific measurements to analyze the effects of deforestation. The researchers will gain a better understanding of how the acoustics of a forest can be used to measure its health.&nbsp;



"From space, parts of the Amazon rainforest that have previously been logged or burned may look lush and green, like a place buzzing with activity and full of sounds. But inside the rainforest, the animal life may tell a different story, of a harsh environment and a quieter soundscape," says NASA.



Video Credit: NASA’s Goddard Space Flight Center&nbsp;



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Monitoring deforestation in the Amazon through sounds

[sendtonews key="u0TYxxqfF7-2186404-12187" type="single"] Today’s Video of the Day from NASA’s...