In the vast ocean, a fascinating story unfolds beneath its surface - a tale of carbon’s unexpected journey and survival deep within marine sediments.



Organic carbon, one of Earth's most prolific players, defies expectations by persisting in an environment where it should naturally break down. 



This resilience hints at the ocean’s hidden capabilities as a carbon reservoir, which quietly influence the planet's climate balance. It's a curious phenomenon that has puzzled scientists for years.



<h2 class="wp-block-heading" id="h-tools-in-the-fight-against-climate-change">Tools in the fight against climate change </h2>



Why does so much carbon endure in marine sediments, resisting decomposition that would typically release it back into the atmosphere?



The answers to this enigma not only reveal nature's intricate processes but also offer promising insights into mitigating climate change.



A study led by scientists at <a href="https://www.manchester.ac.uk/" target="_blank" rel="noreferrer noopener">The University of Manchester</a> and the University of Leeds has shed new light on ocean carbon storage.



The experts have identified two processes that play a significant role in <a href="https://www.earth.com/news/can-we-mitigate-climate-change-with-deep-ocean-storage/" target="_blank" rel="noreferrer noopener">preserving organic carbon</a> beneath the ocean floor.



These two processes are "sorption," the uptake of carbon by minerals, and "molecular transformation," which refers to the conversion of smaller, reactive molecules into larger, less reactive ones.



These new insights could guide strategies to restrict <a href="https://www.earth.com/news/circular-economy-needed-to-reduce-americas-carbon-emissions/" target="_blank" rel="noreferrer noopener">carbon emissions</a> from oceans, offering robust tools in the global battle against climate change.



<h2 class="wp-block-heading" id="h-understanding-carbon-preservation-processes">Understanding carbon preservation processes </h2>



The researchers dedicated several years to this project, creating a comprehensive model that takes into account a broader range of carbon preservation processes than ever before. 



These processes include burial in sediments, hydrolysis (the breakdown of carbon in water), sorption, and molecular transformation.



The model was compared to real-world data collected from <a href="https://www.earth.com/news/life-in-deep-ocean-sediments-can-survive-boiling-hot-temperatures/" target="_blank" rel="noreferrer noopener">ocean sediments</a>. The results were astonishing.



According to the team's calculations, the carbon preservation efficiency of the ocean is nearly three times higher than estimates from previous models.



In addition, the new model provides a more accurate prediction of how much organic carbon is locked under the sea.



<h2 class="wp-block-heading" id="h-new-pathways-for-carbon-management">New pathways for carbon management </h2>



The researchers then paired their model with artificial intelligence to determine the integral roles of carbon preservation processes.



"Understanding how and why carbon is stored in marine sediments is crucial if we are to harness or replicate these natural processes to <a href="https://www.earth.com/news/why-disinformation-is-a-persistent-scourge-in-the-battle-against-climate-change/" target="_blank" rel="noreferrer noopener">combat climate change</a>," said Dr. Peyman Babakhani, the study's lead researcher.



"Our findings shed light on mechanisms that were previously overlooked, offering new pathways for carbon management. AI, often seen as a black box, became a powerful tool when applied in the right way, helping us understand complex environmental processes."



<h2 class="wp-block-heading" id="h-powerful-mechanisms-of-ocean-carbon-storage">Powerful mechanisms of ocean carbon storage </h2>



The study emphasizes the pivotal role of sorption and molecular transformation in the <a href="https://www.earth.com/news/marine-plankton-are-key-players-in-carbon-cycle-regulation/" target="_blank" rel="noreferrer noopener">carbon cycle</a>. Combined, these two processes safeguard organic matter from degradation in the top layer of the ocean sediment and transport it deeper.



This layered protection ensures that carbon remains isolated for extended periods, reducing its potential to contribute to atmospheric greenhouse gases.



Over time, the preserved carbon can metamorphose into oil or gas, effectively preventing its release as carbon dioxide into the atmosphere.



Such natural mechanisms not only serve as a buffer against rising emissions but also provide a model for innovative carbon management techniques.



The new model may be used to explore climate change mitigation strategies such as ocean fertilization, offering scalable solutions and a glimmer of hope in the fight against climate change.



<h2 class="wp-block-heading" id="h-safeguarding-carbon-in-the-ocean">Safeguarding carbon in the ocean</h2>



The ocean’s unique capacity to lock away carbon highlights its crucial role in maintaining Earth’s ecological balance. 



The processes of sorption and molecular transformation, as revealed in this study, highlight the ocean’s pivotal role in safeguarding carbon within marine sediments. 



These natural mechanisms not only keep carbon out of the atmosphere but also create opportunities to mimic these processes for enhanced carbon sequestration.



By leveraging the insights from this research, scientists could explore ocean-based solutions that align with global climate goals. 



From enhancing sediment carbon storage to developing sustainable marine management practices, understanding these natural processes could pave the way for innovative strategies to tackle rising carbon emissions.



The full study was published in the journal <a href="https://www.nature.com/articles/s41561-024-01606-y" target="_blank" rel="noreferrer noopener">Nature Geoscience</a>.



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How the ocean holds carbon: Hidden mechanisms revealed

In the vast ocean, a fascinating story unfolds beneath its surface - a tale of carbon’s unexpected journey and survival deep within marine sediments. Organic carbon, one of Earth's most prolific players, defies expectations by persisting in an environment where it should naturally break down. This resilience hints at the ocean’s hidden capabilities as a carbon reservoir, which quietly influence the planet's climate balance. It's a curious phenomenon that has puzzled scientists for years. Tools in the fight against climate change Why does so much carbon endure...

Delta Smelt Endangered By California Drought. California's historic drought could wipe out a tiny, endangered fish that's played an outsized role in the state's water wars.
The delta smelt lives in the Sacramento-San Joaquin River Delta, the West Coast's largest estuary that supplies water to <a href="https://www.bing.com/search?q=Central+Valley&amp;cvid=58903a0fd303478490f5f8327fcd32bc&amp;FORM=ANAB01&amp;PC=HCTS">Central Valley</a> farms and millions of Southern California residents.
The silvery, finger-sized fish has been in trouble for years, but the four-year drought is helping to push the smelt to the brink of extinction. And it threatens several other native fish species, including the longfin smelt, green sturgeon and winter-run Chinook salmon. Delta Smelt Endangered By California Drought
In July, a key index of delta smelt abundance hit zero for the first time since the survey began in 1959. Researchers found a handful of smelt, but the number was too small to register on the population gauge.
"The delta smelt is basically on its last legs right now. We'll be lucky if it survives the coming year," said Peter Moyle, a fish biologist at the University of California, Davis who has been studying the fish for four decades.
On a recent fish survey, Moyle and three other researchers trawled the turbid waters of the sprawling estuary that once teemed with the delta smelt.
They pulled a net out of the water and emptied dozens of fish into a plastic bin on their research boat. They logged and tossed back 13 species, including carp, crappie, catfish and striped bass - but no delta smelt.
Delta smelt populations have been declining for decades due to invasive predators, pollution, habitat loss and increased water exports to farms and cities. The drought has worsened conditions by reducing freshwater flows and raising water temperatures.
"The drought has basically made all the things that were bad for smelt worse," Moyle said.
The delta smelt has been at the center of vicious water fights between farmers, fishermen, cities and environmentalists ever since it was listed as a threatened species under the U.S. Endangered Species Act in 1993. It was listed as an endangered under state law in 2010.
The government regularly cuts water exports from the delta to protect the smelt and other threatened fish from being sucked into the giant pumps that send water south.
Scientists and environmentalists say the sensitive fish needs protection because it's a key indicator of the delta's health, but farmers say too much precious water has been wasted on the fish - water that could be used to grow crops and fill reservoirs.
Stanislaus County almond grower Jim Jasper, who relies on delta water to irrigate his orchards, was a part of a lawsuit that challenged the U.S. <a href="http://www.earth.com/news/gill-development-and-water-temperatures-limit-fish-growth/">Fish</a> and Wildlife Service over delta smelt protections. The U.S. Supreme Court rejected their appeal earlier this year, leaving the water restrictions in place.
Last year, Jasper pulled out 400 acres of almond trees - about one-fifth of his orchards - because he couldn't get enough water to irrigate them, reducing his almond production and forcing him to cut employee work hours.
Standing next to the irrigation canal that delivers water from the delta, Jasper said endangered species protections have worsened the agricultural impacts of the drought.
"The delta smelt continues to wrack a lot of havoc on today's farming community," said Jasper, who runs Steward &amp; Jasper Orchards, the Newman, California-based almond company his father co-founded in 1948. "If it became extinct would anybody's lives change? I really don't think so."
The UC Davis Fish Conservation and Culture Laboratory in Byron may be the last place where you can still find large numbers of delta smelt.
The hatchery was recently awarded a $10 million federal grant to continue its work breeding the smelt in captivity for scientific research and to ensure its survival if the species vanishes from the wild.
"One of our most important projects is to maintain a refuge population of this species," said Tien-Chieh Hung, the lab's director. "We may be the place that holds the most delta smelt in the world."
While the lab could eventually release its carefully bred smelt into the delta, there's no guarantee they could survive in the wild and there would be no point if their native habitat can no longer support them.
That's why researchers say it's better to protect the smelt now before they disappear from the delta.
"If you're saving the smelt," Moyle said, "you're saving the habitat for other species in the delta as well."
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Delta Smelt Endangered By California Drought

Delta Smelt Endangered By California Drought. California's historic drought could...

How Does Obama's New Climate Change Plan Impact States?. President Barack Obama unveiled the final regulations in his plan that will cut carbon dioxide emissions nationwide 32 percent by 2030. Obama touted it as a bold step to slow climate change, while opponents said it was <a href="http://www.earth.com/news/alaska-federal-public-lands-trump/">federal</a> overreach that will raise prices for electricity consumers. Here's what you need to know about the impact of the new plan on the states:
WHAT CHANGED IN THE PLAN?
Sixteen states will have more stringent carbon dioxide reduction targets than those that were in the original proposal last year. There are two main reasons, according to the Environmental Protection Agency's Janet McCabe: Renewable sources such as wind and solar are getting cheaper and easier to build, and the <a href="https://www.bing.com/search?q=epa&amp;cvid=9d55c2dfdb54406c8e2dade61f8080fd&amp;FORM=ANAB01&amp;PC=HCTS">EPA</a> considered that states in some cases could easily source clean power from neighbors if they didn't have the capacity to generate it themselves. Also, the states' ongoing efforts to reduce energy demand won't be included in their baseline measurements. How Does Obama's New Climate Change Plan Impact States?
"In the proposal we looked at each state in isolation," said McCabe, acting assistant administrator for the EPA's office of air and radiation. "In the final rule we have opened it up so we could look at capacity for renewables and natural gas across the region."
Thirty-one states' targets were loosened, but the tougher goals for the others make the overall plan more ambitious than the original proposal.
WHAT DO THE STATES THINK?
The Republican-led states that disliked the original proposal still hate it and are threatening lawsuits to block it. Wyoming, Pennsylvania, North Dakota, Kentucky, West Virginia, Indiana, Missouri and Kansas are the other states among the 16 that will have to reduce their carbon dioxide emissions the most, compared to the original proposal. Some, like Republican Kansas Gov. Sam Brownback, had sticker shock upon seeing the new regulations.
"The final rule released today is twice as bad for Kansas as the proposed rule released last summer," Brownback said.
In some of the states that rely less on coal-fired electricity, such as sun-soaked Nevada and hydroelectric rich Oregon, officials expressed their support and said they were well-positioned to comply.
"Nevada has been ahead of this curve for a long time," said Jennifer Taylor, executive director of the nonpartisan Clean Energy Project.
Leaders in other states such as Montana, which had supported the original proposal, expressed dismay at the tougher standards. "It looks as though the Obama administration has moved the goal post on us," said Democratic Gov. Steve Bullock of Montana.
WHAT'S NEXT?
States have until 2018 to submit their final emission reduction plans to the EPA. After that, the reductions begin in gradual step-down phases beginning in 2022 through 2029, with the final targets to be met in 2030.
WHAT HAPPENS IF A STATE DOESN'T TURN IN A PLAN?
Some state officials who oppose the rule have said they are considering not submitting a plan at all to the EPA. Any state that doesn't file a plan, or submits one that is unworkable under the federal rule, will be forced to use a federal model, McCabe said.
WHICH STATES ARE EXEMPT?
Vermont, Alaska and Hawaii. Vermont does not have fossil-fuel power plants. Alaska and Hawaii are isolated from the rest of the nation's electrical grid, leaving EPA officials without the data they used to set goals for the other states. EPA officials prefer to call Alaska and Hawaii deferments rather than exemptions.
© 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.

How Does Obama's New Climate Change Plan Impact States?

How Does Obama's New Climate Change Plan Impact States?. President...

Toxic Algae Bloom

Toxic Algae Bloom Spreads From California To Alaska. A vast toxic algae bloom off the West Coast is denser, more widespread and deeper than scientists feared even weeks ago, according to surveyors aboard a National Oceanic and Atmospheric Administration research vessel.
This coastal ribbon of microscopic algae, up to 40 miles wide and 650 feet deep in places, is flourishing amid unusually warm Pacific Ocean temperatures. It now stretches from at least California to Alaska and has shut down lucrative fisheries. Shellfish managers on Tuesday doubled the area off Washington's coast that is closed to Dungeness crab fishing, after finding elevated levels of marine toxins in tested crab meat. Toxic Algae Bloom Spreads From California To Alaska
So-called "red tides" are cyclical and have happened many times before, but ocean researchers say this one is much larger and persisting much longer, with higher levels of neurotoxins bringing severe consequences for the Pacific seafood industry, coastal tourism and marine ecosystems.
Dan Ayres, coastal shellfish manager for the Washington Department of Fish and Wildlife, said the area now closed to crab fishing includes more than half the state's 157-mile-long coast, and likely will bring a premature end to this year's coastal crab season.
"We think it's just sitting and lingering out there," said Anthony Odell, a University of Washington research analyst who is part of a NOAA-led team surveying the harmful algae bloom, which was first detected in May. "It's farther offshore, but it's still there."
The survey data should provide a clearer picture of what is causing the <a href="http://www.earth.com/news/toxic-algal-blooms-will-become-more-frequent-off-the-u-s-west-coast/">bloom</a> which is brownish in color, unlike the blue and green algae found in polluted freshwater lakes. Marine detectives already have a suspect: a large patch of water running as much as 3 degrees centigrade warmer than normal in the northeast Pacific Ocean, nicknamed "the blob."
"The question on everyone's mind is whether this is related to global climate change. The simple answer is that it could be, but at this point it's hard to separate the variations in these cycles," said Donald Boesch, professor of marine science at the University of <a href="https://www.bing.com/search?q=maryland&amp;cvid=3aabd5a6b0cb4b3eb9fcef31fa4a03b8&amp;FORM=ANAB01&amp;PC=HCTS">Maryland</a> who is not involved in the survey. "Maybe the cycles are more extreme in the changing climate."
"There's no question that we're seeing more algal blooms more often, in more places, when they do occur, they're lasting longer and often over greater geographical areas. We're seeing more events than documented decades ago," said Pat Glibert, professor at Horn Point Laboratory, University of Maryland Center for Environmental Science.
Odell recently completed the first leg of the survey, mostly in California waters. On Wednesday, researchers plan to continue monitoring the sea between Newport, Oregon, and Seattle. The vessel will then go to Vancouver Island, wrapping up in early September. Another research ship is taking samples off Alaska.
The brownish bloom was particularly thick off the coast of Santa Barbara, California, and Odell said it was unusually dominated by one type of algae called Pseudo-nitzschia, which can produce the neurotoxin domoic acid.
"It's an indication of an imbalance," said Vera Trainer, a research oceanographer with the Northwest Fisheries Science Center in Seattle. "Too much of any one thing is not healthy for anybody to eat."
Trainer said this bloom is the worst she's seen in 20 years of studying them. Harmful algal blooms have usually been limited to one area of the ocean or another, and have disappeared after a few weeks. This one has grown for months, waxing and waning but never going away.
"It's been incredibly thick, almost all the same organism. Looks like a layer of hay," said Raphael Kudela, a professor of ocean sciences at University of California, Santa Cruz.
The current bloom also involves some of the highest concentrations of domoic acid yet observed in Monterey Bay and other areas of the West Coast.
"It's really working its way into the food web and we're definitely seeing the impacts of that," Kudela said, noting that sea lions are getting sick and pelicans are being exposed. And now that the Pacific is experiencing its periodic ocean warming known as El Nino, it may come back even stronger next year, he said.
Domoic acid is harmful to people, fish and marine life. It accumulates in anchovies, sardines and other small fish as well as shellfish that eat the algae. Marine mammals and fish-eating birds in turn can get sick from eating the contaminated fish. In people, it can trigger amnesic shellfish poisoning, which can cause permanent loss of short-term memory in severe cases.
State health officials stress that seafood bought in stores is still safe to eat because it is regularly tested. While there have been no reports of human illnesses linked to this year's bloom, authorities aren't taking chances in fisheries with dangerous toxin levels.
California public health officials have warned against eating recreationally harvested mussels and claims, or any anchovy, sardines or crabs caught in waters off Monterey, Santa Cruz and Santa Barbara counties. Other shellfish harvests are shut down along Oregon's coast.
The most recent samples showed the highest-ever recorded concentrations of domoic acid in the internal organs of Dungeness crab, Ayres said.
"This is really unprecedented territory for us," said Ayres.
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Toxic Algae Bloom Spreads From California To Alaska

Toxic Algae Bloom Spreads From California To Alaska. A vast...

EPSON DSC picture

Amazon Fire Risk Differs Across East-West Divide. Scientists at <a href="https://www.bing.com/search?q=nasa&amp;cvid=7872fda91dbf45df883556df6fafeaa5&amp;FORM=ANAB01&amp;PC=HCTS">NASA</a> and the University of California, Irvine, project fire risk for South America's Amazon Basin in 2015 to fall along an east-west divide. According to their model, based on multiple satellite datasets, the forests of the western Amazon will experience average or below-average fire risk, while those in the eastern Amazon will see above-average risk.

Amazon fire season for the region, which spans portions of Bolivia, Brazil and Peru, begins in May, peaks in September and ends in January. The underlying pattern in this year's fire forecast is driven by the fact that the western Amazon is more heavily influence by sea surface temperatures in the tropical Atlantic, and the eastern Amazon's fire severity risk correlates to sea surface temperature changes in the tropical Pacific Ocean. Currently, Pacific sea surface temperatures have risen as an El Niño event develops, a climate phenomenon that alters rainfall patterns around the globe.

[caption id="attachment_2383402" align="alignleft" width="150"]<a href="http://cff1.greenatom.net/uploads/2015/08/04132310/amazon-fire-season_1big_nasa-copy.jpg"><img class="size-thumbnail wp-image-2383402" src="http://cff1.greenatom.net/uploads/2015/08/04132310/amazon-fire-season_1big_nasa-copy-150x150.jpg" alt="Fire season severity forecast " width="150" height="150" /></a> Fire season severity forecast[/caption]

"As we're building towards a moderate to strong El Niño, that places even more fire risk across portions of the central and eastern Amazon that are more sensitive to El Niño than to changes in the Atlantic," said Doug Morton, co-investigator on the project at NASA's Goddard Space Flight Center in Greenbelt, Maryland.

The fire severity forecast model, developed by Yang Chen and Jim Randerson at the University of California, Irvine, along with NASA scientists, was first published in 2011 in the journal Science. To develop the model, they compared historic fire data from NASA's Terra satellite with sea surface temperature data in the tropical Pacific and North Atlantic oceans from buoys and satellite images compiled by the National Oceanic and Atmospheric Administration. Amazon Fire Risk Differs Across East-West Divide

Conditions at the end of the rainy season are used to forecast fire activity during the dry season. Sea surface temperatures in the tropical Atlantic and tropical Pacific oceans three to six months before the peak of fire season are strongly correlated with total fire activity. In general, warmer ocean temperatures at the end of the Amazon's wet season lead to reductions in rainfall and soil moisture at the beginning of the dry season. Drier conditions in the Amazon lead to more severe fires during the late dry season. But each ocean affects different regions of the Amazon.

"This year, only the El Niño [in the Pacific] is playing a major role. That's why the east-west contrast is more distinctive," said Chen.

[caption id="attachment_2383400" align="alignleft" width="150"]<a href="http://cff1.greenatom.net/uploads/2015/08/04132307/amazon-fire-season_2big_nasa-copy.jpg"><img class="size-thumbnail wp-image-2383400" src="http://cff1.greenatom.net/uploads/2015/08/04132307/amazon-fire-season_2big_nasa-copy-150x150.jpg" alt="Blue colors show above average ground and surface water and red colors show below average ground and surface water" width="150" height="150" /></a> Blue colors show above average ground and surface water and red colors show below average ground and surface water[/caption]

Sea surface temperatures in the Pacific Ocean are warmer than normal – El Niño conditions – which suppress rainfall in the eastern Amazon. The three regions at highest risk are Brazil states Maranhão, Mato Grosso and Pará. Meanwhile, sea surface temperatures in the tropical North Atlantic are average or cooler than average, keeping higher amounts of rainfall in the south and southwestern Amazon.

To check their model forecast, as the dry season has gotten underway, the researchers have compared their initial forecast with observations coming in from NASA's precipitation satellite missions' multisatellite datasets, as well as groundwater data from the joint NASA/German Aerospace Center Gravity Recovery and Climate Experiment (GRACE) mission.

This year's fire risk comes on the heels of a severe drought in eastern and southeastern Brazil, where the satellite data showed a continued reduction in rainfall and a drawdown of groundwater associated with lower than normal precipitation. The amount of groundwater present is a good indicator of fire risk, said Morton, because the signal persists longer and holds the "memory" of water in the soil that is the main source of moisture for trees and vegetation. When ground and soil water are depleted, the region dries out and fire risk goes up.

Each year since 2012, Chen, Randerson and Morton, with the support of the Gordon and Betty Moore Foundation, have issued an <a href="https://www.bing.com/search?q=amazon+river&amp;cvid=6576a65f590e4f89af07b8141c5c592f&amp;FORM=ANAB01&amp;PC=HCTS">Amazon</a> fire forecast for the east, west and southern parts of the basin. With the exception of 2013, their forecasts based on climate conditions have been fairly accurate, said Chen. They are currently investigating the climate conditions that led to overestimating fires – and other researchers to overestimate hurricanes – in 2013.

Increasingly, scientists and agencies in Peru and <a href="http://www.earth.com/news/forest-degradation-is-more-destructive-than-deforestation-in-the-brazilian-amazon/">Brazil</a> are incorporating this type of fire risk assessment into their regional planning for disaster responses. The forecasts provide an indication of the climate component of fire risk. However, fire risk may be underestimated in some frontier regions of Peru and Brazil where humans are likely to set intentional fires for clearing land for agriculture or deforestation.

This year, if the Pacific El Niño continues to strengthen, the team expects to see fire risk increase in the central Amazon, and they may issue a fire forecast for the northern Amazon basin for the first time.

"The seasonality of fires in northern Amazonia is different," Morton said. Peak fire activity in the northern Amazon occurs in February and March, so sea surface temperatures three months earlier in October and November have the most influence on rainfall and fire risk. The last time strong El Niño conditions persisted that long was 1997.

"There were enormous fires in the ’97-’98 El Niño in Roraima," said Morton. "That was part of what put fires in the Amazon on the scientific map."

"If the El Niño continues to strengthen, that's a region that we will be watching," Morton said, adding that the link between El Niño conditions and fires in the Brazilian state of Roraima has been seen before in the historic record going back to 2000, as weaker El Niño events in 2002-2003 and 2006-2007 led to large increases in fire activity. "Roraima’s increase in fire risk during El Niño events is so consistent that you don't need our model to know that the region will experience significant fire risk in 2015-2016."

---

<a href="http://www.nasa.gov" target="_blank" rel="noopener noreferrer">NASA</a>

Amazon Fire Risk Differs Across East-West Divide

Amazon Fire Risk Differs Across East-West Divide. Scientists at NASA...

New study traces the fate of carbon stored in thawing Arctic soils

As temperatures rise, some of the organic carbon stored in Arctic permafrost meets an unexpected fate--burial at sea. As many as 2.2 million metric tons of organic carbon per year are swept along by a single river system into Arctic Ocean sediment, according to a new study an international team of researchers published today in Nature. This process locks away carbon dioxide (CO2) - a greenhouse gas - and helps stabilize the earth's CO2 levels over time, and it may help scientists better predict how the natural carbon cycle will interplay with the surge of CO2 emissions due to human activities.

"The erosion of permafrost carbon is very significant," says Woods Hole Oceanographic Institution (WHOI) Associate Scientist Valier Galy, a co-author of the study. "Over thousands of years, this process is locking CO2 away from the atmosphere in a way that amounts to fairly large carbon stocks. If we can understand how this process works, we can predict how it will respond as the climate changes."

Permafrost--frozen ground found in the Arctic and in some alpine regions--is known to hold billions of tons of organic material. Amid concerns about rising Arctic temperatures and their impact on permafrost, many researchers have directed their efforts to studying the permafrost carbon cycle--the processes through which carbon circulates between the atmosphere, the soil and plants (the biosphere), and the sea. Yet how this cycle works and how it responds to the warming, changing climate remains poorly understood.

Galy and his colleagues from Durham University, the Institut de Physique du Globe de Paris, the NERC Radiocarbon Facility, Stockholm University, and the Universite Paris-Sud set out to characterize the carbon cycle in one particular piece of the Arctic landscape--northern Canada's Mackenzie River, the largest river flowing into the Arctic Ocean from North America and that ocean's greatest source of sediment. The researchers hypothesized that the Mackenzie's muddy water might erode soils along its path, some from places where permafrost is melting, and wash that biosphere-derived material and the organic carbon within it into the ocean, preventing the degradation of organic carbon and associated release of CO2 into the atmosphere.

The researchers collected samples at various depths and locations along the river system, lowering a specially-designed device to take samples of the water and suspended sediments carried by the river. To take into consideration the river's seasonal variation--its flow increases sharply during the spring, when warm temperatures melt the snowpack and raise water levels, and drops during the frozen winter months--they sampled it during different seasons across three years starting in 2009.

Then the researchers sifted through the samples to isolate the carbon they contained. They used the presence of one specific isotope of carbon that decays over time, carbon-14, to determine how old the carbon was. This was important because it revealed the carbon's origin- rock or biosphere.

"The carbon that comes from the rocks has been there for hundreds of thousands, sometimes millions of years," Galy says. "The other carbon can come from a tree that fell into the river two days before we sampled or from the permafrost and be thousands years old."

The carbon from rocks has been stored away from the atmosphere for a long time, and exists in a form that makes it less likely to react with its environment and enter the atmosphere. But the newer, biosphere-based carbon is more labile and likely to react, potentially entering the atmosphere and raising CO2 levels.

"If you bury the biosphere-based carbon, you have an actual carbon sink--you're taking carbon that could be out in the atmosphere and locking it away," Galy says.

The researchers compared what they found along the river to a sediment core obtained from the Arctic Ocean seabed at the Mackenzie delta, tracing the rock and biosphere carbon to the sediment deposits there. They found that a significant amount of the biosphere carbon--more than that carried by all the major Eurasian Arctic rivers combined--is swept into storage offshore. Using carbon-14 they further determined that this biosphere-derived carbon is up to 9000 years old, a clearly indication of its permafrost origin.

"That carbon is not returning to the atmosphere for a long time," says Robert Hilton, associate professor at Durham University who worked on the study. "Over geological timescales, warming conditions lead to the sequestration of that carbon at sea."

This sequestration likely kept naturally-occurring CO2 levels in check. But the researchers emphasize that this natural process is 10 to 20 times too slow to keep pace with CO2 emissions from human activities, such as the burning of fossil fuels.

"River transfer is not going to solve the problem--it's not going to make the CO2 we inject into the atmosphere go away," Galy says. But the findings do reveal a more complex picture of the relationships between warming temperatures, thawing permafrost and carbon emission--a picture that Galy and his international colleagues hope to further investigate with future studies.

---

<a href="http://www.whoi.edu" target="_blank" rel="noopener">Woods Hole Oceanographic Institute</a>

Study Tracks The Fate Of Melting Arctic Permafrost

New study traces the fate of carbon stored in thawing...

Study Tracks The Fate Of Melting Arctic Permafrost. New study traces the fate of carbon stored in thawing Arctic soils

As temperatures rise, some of the organic carbon stored in Arctic permafrost meets an unexpected fate--burial at sea. As many as 2.2 million metric tons of organic carbon per year are swept along by a single river system into Arctic Ocean sediment, according to a new study an international team of researchers published today in Nature. This process locks away carbon dioxide (CO2) - a greenhouse gas - and helps stabilize the earth's CO2 levels over time, and it may help scientists better predict how the natural carbon cycle will interplay with the surge of CO2 emissions due to human activities.

"The erosion of permafrost carbon is very significant," says Woods Hole Oceanographic Institution (WHOI) Associate Scientist Valier Galy, a co-author of the study. "Over thousands of years, this process is locking CO2 away from the atmosphere in a way that amounts to fairly large carbon stocks. If we can understand how this process works, we can predict how it will respond as the climate changes."Study Tracks The Fate Of Melting Arctic Permafrost

Permafrost--frozen ground found in the Arctic and in some alpine regions--is known to hold billions of tons of organic material. Amid concerns about rising Arctic temperatures and their impact on permafrost, many researchers have directed their efforts to studying the permafrost carbon cycle--the processes through which carbon circulates between the atmosphere, the soil and plants (the biosphere), and the sea. Yet how this cycle works and how it responds to the warming, changing climate remains poorly understood.

Galy and his colleagues from Durham University, the Institut de Physique du Globe de Paris, the NERC Radiocarbon Facility, Stockholm University, and the Universite Paris-Sud set out to characterize the carbon cycle in one particular piece of the Arctic landscape--northern Canada's Mackenzie River, the largest river flowing into the Arctic Ocean from North America and that ocean's greatest source of sediment. The researchers hypothesized that the Mackenzie's muddy water might erode soils along its path, some from places where permafrost is melting, and wash that biosphere-derived material and the organic carbon within it into the ocean, preventing the degradation of organic carbon and associated release of CO2 into the atmosphere.

The researchers collected samples at various depths and locations along the river system, lowering a specially-designed device to take samples of the water and suspended sediments carried by the river. To take into consideration the river's seasonal variation--its flow increases sharply during the spring, when warm temperatures melt the snowpack and raise water levels, and drops during the frozen winter months--they sampled it during different seasons across three years starting in 2009.

Then the researchers sifted through the samples to isolate the carbon they contained. They used the presence of one specific isotope of carbon that decays over time, carbon-14, to determine how old the carbon was. This was important because it revealed the carbon's origin- rock or biosphere.

"The carbon that comes from the rocks has been there for hundreds of thousands, sometimes millions of years," Galy says. "The other <a href="https://www.bing.com/search?q=carbon&amp;cvid=a66e1c1f72e94a3cb4b72dac1fbbea18&amp;FORM=ANAB01&amp;PC=HCTS">carbon</a> can come from a tree that fell into the river two days before we sampled or from the permafrost and be thousands years old."

The carbon from rocks has been stored away from the atmosphere for a long time, and exists in a form that makes it less likely to react with its environment and enter the atmosphere. But the newer, biosphere-based carbon is more labile and likely to react, potentially entering the atmosphere and raising CO2 levels.

"If you bury the biosphere-based carbon, you have an actual carbon sink--you're taking carbon that could be out in the atmosphere and locking it away," Galy says.

The researchers compared what they found along the river to a sediment core obtained from the Arctic Ocean seabed at the Mackenzie delta, tracing the rock and biosphere carbon to the sediment deposits there. They found that a significant amount of the biosphere carbon--more than that carried by all the major Eurasian Arctic rivers combined--is swept into storage offshore. Using carbon-14 they further determined that this biosphere-derived carbon is up to 9000 years old, a clearly indication of its permafrost origin.

"That carbon is not returning to the atmosphere for a long time," says Robert Hilton, associate professor at Durham University who worked on the study. "Over geological timescales, warming conditions lead to the sequestration of that carbon at sea."

This sequestration likely kept naturally-occurring CO2 levels in check. But the researchers emphasize that this natural process is 10 to 20 times too slow to keep pace with CO2 emissions from human activities, such as the burning of <a href="http://www.earth.com/news/fossil-fuels-lower-energy-return/">fossil fuels.</a>

"River transfer is not going to solve the problem--it's not going to make the CO2 we inject into the atmosphere go away," Galy says. But the findings do reveal a more complex picture of the relationships between warming temperatures, thawing permafrost and carbon emission--a picture that Galy and his international colleagues hope to further investigate with future studies.

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<a href="http://www.whoi.edu" target="_blank" rel="noopener noreferrer">Woods Hole Oceanographic Institute</a>

Study Tracks The Fate Of Melting Arctic Permafrost. New study...

Adult Corals Give Their Offspring Skills Necessary To Survive. A new study from scientists at the University of Hawai'i - Mānoa's (UHM) Hawai'i Institute of Marine Biology (HIMB) reveals that preconditioning adult corals to increased temperature and ocean acidification resulted in offspring that may be better able to handle those future environmental stressors. This rapid trans-generational acclimatization may be able to "buy time" for corals in the race against climate change.

Hollie Putnam, lead author of the Journal of Experimental Biology-featured study and HIMB assistant researcher; and Ruth Gates, co-author and HIMB senior researcher, exposed two groups of parental corals to either ambient ocean conditions or IPCC-predicted future ocean conditions - warmer and more acidic water. As expected, the harsher future conditions negatively affected the health of the parental coral - lowering photosynthesis and production to consumption ratios. Surprisingly, however, the offspring of parents who were exposed to future conditions appeared healthier when re-exposed to the harsher environment.

"By preconditioning the corals while the offspring are being brooded it may be possible to increase the offspring's potential to perform under stressful environmental conditions," said Putnam.

Corals have been suffering huge losses in diversity and abundance on reefs worldwide due to local stressors such as overfishing, coastal development, pollution, and sedimentation, for example. Further, global stressors such as increased temperature result in coral bleaching - a breakdown in the symbiosis between the cnidarian host and the symbiotic algae - which can cause mass coral mortality. Additionally, corals exposed to ocean acidification can struggle to build their skeletons and reefs are undergoing bioerosion and dissolution.

"Together these local and global stressors are placing an unprecedented strain on coral reef ecosystems. It has even been predicted that some corals may go extinct and the reefs will not provide the same biological diversity and provisioning - goods and services valued at hundreds of billions of dollars annually," said Putnam. Adult Corals Give Their Offspring Skills Necessary To Survive

It is thought genetic adaption is the primary option for corals to respond to climate change. With the rapid rate of environmental change, however, genetic adaptation may not be able to keep pace. Putnam and Gates were interested in the potential for other more rapid response mechanisms like the acclimatization provided when adults provision their offspring based on their environmental experience. The researchers think epigenetics, or a change in the quantity and product of a gene without a change in DNA sequence, may be one such acclimatory mechanism that allows the organism to rapidly adjust to environmental change. Epigenetics and parental effects, they say, may help to buffer corals against the rapidly changing climate.

"Our work suggests that when we consider multiple life stages in connection and their environmental history, corals have resources to respond to climate change that we have not yet considered fully," said Putnam. "This may be good news for corals of the future."

In a new series of experiments, the researchers are expanding their analysis to more coral life stages by tracking the coral larvae from preconditioning in their parents until they settle and grow into juveniles. Their goal is to assess the "grandchildren" after 3-4 years, when the first offspring become reproductive. They are also comparing the response to temperature and ocean acidification simultaneously and separately to determine if one factor is more influential than another.

---

<a href="http://manoa.hawaii.edu/" target="_blank" rel="noopener noreferrer">University of Hawaii Manoa</a>

Adult Corals Give Their Offspring Skills Necessary To Survive

Adult Corals Give Their Offspring Skills Necessary To Survive. A...

NOAA researchers cite the heavy rains that pounded the middle of the country in July as reason for this summer's enlarged gulf dead zone.

The low-oxygen "dead zone" in the Gulf of Mexico has grown larger than normal, NOAA scientists say. At last count, the hypoxic blob covered 6,474 square miles.

A dead zone is an area of low to no oxygen water that can kill marine life, should fish or other marine mammals find themselves trapped in depleted waters. While fish and mammals can usually avoid dead zones, slow-moving shellfish and crustaceans are more vulnerable to suffocation.

Last year's dead zone measured 5,052 square miles. The latest measurements reveal a growing dead zone that is both bigger than average and larger than NOAA's yearly prediction.

Of the more than 550 dead zones found in lakes and oceans around the world, the Gulf's is the second-largest manmade hypoxic zone. The suffocating water is the result of oxygen-depleting phytoplankton blooms encouraged by high levels of nitrogen and phosphorous -- agricultural and sewage treatment runoff delivered by the mighty Mississippi River.

As phytoplankton die and sink to the bottom, bacteria feast upon them, sucking more oxygen from the water. The oxygen-deprived water remains in place until storms churn up the water layers and help replenish the dead zone with fresh oxygen.

NOAA researchers cite the heavy rains that pounded the middle of the country in July as reason for this summer's enlarged dead zone. The latest numbers are the result of a survey undertaken by NOAA scientists.

"An average area was expected because the Mississippi River discharge levels and associated nutrient data from May indicated an average delivery of nutrients during this critical month which stimulates the fuel for the mid-summer dead zone," Nancy Rabalais, executive director of the Louisiana Universities Marine Consortium (LUMCON), <a class="tpstyle" href="http://www.noaanews.noaa.gov/stories2015/080415-gulf-of-mexico-dead-zone-above-average.html" target="_blank" rel="noopener">said in a press release</a>.

Rabalais led the recent scientific survey that mapped the fish-killing blob in the Gulf.

"Since the models are based largely on the May nitrogen loads from the Mississippi River, the heavy rains that came in June with additional nitrogen and even higher river discharges in July are the possible explanations for the larger size," she said.

In addition to rainfall totals, wind, temperature and currents affect the size and movement of the Gulf's dead zone.

"It would have been even larger without winds out of the west pushing some of the low-oxygen water back to the east," <a class="tpstyle" href="http://www.nola.com/environment/index.ssf/2015/08/2015_gulf_dead_zone_larger_tha.html" target="_blank" rel="noopener">Rabalais told The Times-Picayune</a>.

Previous research has shown that hypoxic conditions in the Gulf result in habitat loss, species displacement and diminished reproductive abilities for many fish.

---

Credit: UPI

2015 Gulf Dead Zone Bigger Than Normal

NOAA researchers cite the heavy rains that pounded the middle...

2015 Gulf Dead Zone Bigger Than Normal. NOAA researchers cite the heavy rains that pounded the middle of the country in July as reason for this summer's enlarged gulf dead zone.

The low-oxygen "dead zone" in the Gulf of <a href="http://www.earth.com/news/experts-track-the-flow-of-nutrients-in-the-gulf-of-mexico/">Mexico</a> has grown larger than normal, NOAA scientists say. At last count, the hypoxic blob covered 6,474 square miles.

A dead zone is an area of low to no oxygen water that can kill marine life, should fish or other marine mammals find themselves trapped in depleted waters. While fish and mammals can usually avoid dead zones, slow-moving shellfish and crustaceans are more vulnerable to suffocation.2015 Gulf Dead Zone Bigger Than Normal

Last year's dead zone measured 5,052 square miles. The latest measurements reveal a growing dead zone that is both bigger than average and larger than NOAA's yearly prediction.

Of the more than 550 dead zones found in lakes and oceans around the world, the Gulf's is the second-largest manmade hypoxic zone. The suffocating water is the result of oxygen-depleting phytoplankton blooms encouraged by high levels of nitrogen and phosphorous -- agricultural and sewage treatment runoff delivered by the mighty Mississippi River.

As phytoplankton die and sink to the bottom, bacteria feast upon them, sucking more oxygen from the water. The oxygen-deprived water remains in place until storms churn up the water layers and help replenish the dead zone with fresh oxygen.

NOAA researchers cite the heavy rains that pounded the middle of the country in July as reason for this summer's enlarged dead zone. The latest numbers are the result of a survey undertaken by NOAA scientists.

"An average area was expected because the Mississippi River discharge levels and associated nutrient data from May indicated an average delivery of nutrients during this critical month which stimulates the fuel for the mid-summer dead zone," Nancy Rabalais, executive director of the Louisiana Universities Marine Consortium (LUMCON), <a class="tpstyle" href="http://www.noaanews.noaa.gov/stories2015/080415-gulf-of-mexico-dead-zone-above-average.html" target="_blank" rel="noopener noreferrer">said in a press release</a>.

Rabalais led the recent scientific survey that mapped the fish-killing blob in the Gulf.

"Since the models are based largely on the May nitrogen loads from the Mississippi River, the heavy rains that came in June with additional nitrogen and even higher river discharges in July are the possible explanations for the larger size," she said.

In addition to rainfall totals, wind, temperature and currents affect the size and movement of the Gulf's dead zone.

"It would have been even larger without winds out of the west pushing some of the low-oxygen water back to the east," <a class="tpstyle" href="http://www.nola.com/environment/index.ssf/2015/08/2015_gulf_dead_zone_larger_tha.html" target="_blank" rel="noopener noreferrer">Rabalais told The Times-Picayune</a>.

Previous research has shown that hypoxic conditions in the Gulf result in habitat loss, species displacement and diminished reproductive abilities for many fish.

---

Credit: UPI

2015 Gulf Dead Zone Bigger Than Normal. NOAA researchers cite...

http://www.forestwander.com

US Raises Concerns About Natural Gas Pipeline Through Forests. The <a href="https://www.bing.com/search?q=us&amp;cvid=732500fc37ab49d8abc261e81de2c304&amp;FORM=ANAB01&amp;PC=HCTS">U.S.</a> Forest Service has raised hundreds of concerns about a proposed natural gas pipeline that would carve a 30-mile swath through national forests in Virginia and West Virginia.
The written comments to federal regulators question why the proposed route of the Atlantic Coast Pipeline has to go through the George <a href="http://www.earth.com/image/mount-rainier-in-washington/">Washington</a> and Monongahela national forests and raises similar worries cited by residents along the path of the 550-mile energy project. US Raises Concerns About Natural Gas Pipeline Through Forests
The 335 questions, comments and corrections were submitted to the Federal Energy Regulatory Commission in late July by H. Thomas Speaks Jr., forest supervisor. The Forest Service already has given the builders of the proposed pipeline the green light to survey the forests.
The pipeline is proposed by Dominion Resources Inc., Duke Energy and two energy partners. It would carry natural gas from Marcellus shale drilling in Pennsylvania, Ohio and West Virginia to the Southeast. It would run from Harrison County, West Virginia, southeast to Greensville County, Virginia, and into North Carolina.
The $5 billion pipeline is intended to deliver cleaner burning natural gas to the Southeast as utilities move away from coal-burning power plants amid tighter federal rules on pollution that contributes to climate change.
The Forest Service filing was in response to a draft report filed in May by Dominion. Forest surveys of wetlands and wildlife, among other resources, are nearing completion, said Frank Mack, a spokesman for Dominion Transmission, a subsidiary that would build the pipeline.
"Much of what we have completed since May will address many of the comments the National Forest Service sent to the FERC, and which we plan to make public when we file our Resource Reports with our application to the FERC later this summer," Mack wrote in an email.
The Forest Service said Speaks' comments are intended to guide Dominion as it develops its final report with the agency on the national forest routes. The Forest Service will make the final decision whether the pipeline is a "suitable use" for the national forests, said Jennifer Adams, special project coordinator for the Forest Service.
Adams said a similar report was filed by the Forest Service on another interstate pipeline project, the Mountain Valley Pipeline, but those comments have not been released. The Mountain Valley project would go through a section of the Jefferson National Forest.
The 300-mile pipeline is a joint venture between EQT Corp. and NextEra Energy Inc. It would run from Wetzel County, West Virginia, to another pipeline in Pittsylvania County.
On the Atlantic Pipeline, one Forest Service comment questions the "necessity to cross" forestlands in building the pipeline. Speaks wrote that the Forest Service policy does not authorize the use of U.S. forests "solely because it affords the applicant a lower cost or less restrictive location when compared to non-NFS lands."
The Forest Service filing also questions whether hazardous materials such as blasting materials would be stored on forestland, the impact on streams and fish, and the restoration of habitat after the pipeline is built, among others.
While politically popular, the proposed pipeline has found opposition among its planned route by residents who object to a pipeline dissecting their land or on environmental grounds. The pipeline has spawned at least two groups opposed to its construction and several lawsuits.
---
Steve Szkotak can be reached on Twitter at <a href="http://twitter.com/sszkotakap" target="_blank" rel="noopener noreferrer">http://twitter.com/sszkotakap</a> .
---
Online:
Atlantic Coast Pipeline: <a href="https://www.dom.com/corporate/what-we-do/natural-gas/atlantic-coast-pipeline" target="_blank" rel="noopener noreferrer">https://www.dom.com/corporate/what-we-do/natural-gas/atlantic-coast-pipeline</a>
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US Raises Concerns About Natural Gas Pipeline

US Raises Concerns About Natural Gas Pipeline Through Forests. The...

Carbon Dioxide

Carbon Pollution From US Power Plants Hits 27-Year Low. Heat-trapping carbon pollution from U.S. power plants hit a 27-year low in April, the Department of <a href="http://www.earth.com/news/earth-could-be-powered-entirely-by-renewable-energy/">Energy</a> announced Wednesday.
A big factor was the long-term shift from coal to cleaner and cheaper natural gas, said Energy Department economist Allen McFarland. Outside experts also credit more renewable fuel use and energy efficiency.
Carbon dioxide - from the burning of coal, oil and gas - is the chief greenhouse gas responsible for man-made global warming. Carbon Pollution From US Power Plants Hits 27-Year Low
"While good news for the environment, we certainly would not want to assume that this trend will continue and that we can simply relax," said John Reilly, co-director of MIT's Joint Program on the Science and Policy of Global Change.
Electric power plants spewed 141 million tons of carbon dioxide in April, the lowest for any month since April 1988, according to Energy Department figures. The power plants are responsible for about one-third of the country's heat-trapping emissions.
April emissions peaked at 192 million tons in 2008 and dropped by 26 percent in seven years.
Carbon pollution from power plants hit their peak in August 2007 with 273 million tons; summer emissions are higher because air conditioning requires more power.
In past years, experts said the U.S. reduction in carbon dioxide pollution was more a function of a sluggish economy, but McFarland said that's no longer the case.
"You don't have a 27-year low because of an economic blip," McFarland said. "There are more things happening than that."
The price of natural gas has dropped 39 percent in the past year, he said. Federal analysts predict that this year the amount of electricity from natural gas will increase 3 percent compared to last year while the power from coal will go down 10 percent.
Those reductions were calculated before this week's announcements of new power plant rules. The new rules aim to cut carbon pollution from electricity generators another 20 percent from current levels by 2030.
The pollution cuts in April are because efficiency has cut electricity demand and energy from non-hydropower renewable sources has more than doubled, said Princeton University professor Michael Oppenheimer.
"A factor behind all these trends is that the writing is on the wall about the future of coal and thus the future of U.S. carbon dioxide emissions," Oppenheimer said in an email. "The regulatory noose is tightening and companies are anticipating a future with lower and lower dependence on fossil fuels and lower and lower carbon dioxide emissions."
---
Online:
U.S. Energy Information Administration on April emissions: <a href="http://1.usa.gov/1IXTCCG" target="_blank" rel="noopener noreferrer">http://1.usa.gov/1IXTCCG</a>
---
Seth Borenstein can be followed at <a href="http://twitter.com/borenbears" target="_blank" rel="noopener noreferrer">http://twitter.com/borenbears</a>
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Carbon Pollution From US Power Plants Hits 27-Year Low

Carbon Pollution From US Power Plants Hits 27-Year Low. Heat-trapping...

Puerto Rico Drought

Puerto Ricans Face Severe Drought And Economic Slump. Puerto Ricans are learning to live without water on an island that already was suffering an economic crisis.
A severe drought is forcing businesses to temporarily close, public schools to cancel breakfast service and people to find creative ways to stay clean amid sweltering temperatures.
Rationing rules that had meant water coming through the pipes only one day out of three will increase the cutoff to one day out of four starting next week, government officials say.
"I've grown fearful of the weather report," said Cornelio Vegazo, owner of a roof-repair company. "There's no light at the end of the tunnel."Puerto Ricans Face Severe Drought And Economic Slump
The drought is one of the worst in the U.S. territory's history. July was the fourth driest month in the capital of San Juan since 1898, the year Puerto Rico became a possession of the United States. Only 1.60 inches (4 centimeters) of rain fell last month, and forecasters predict several more weeks and possibly months of dry conditions.
Nearly 13 percent of Puerto Rico is in extreme drought and an additional 38 percent is in a severe one, according to the National Drought Mitigation Center, which says 2.5 million people are affected.
The situation has grown so dire that Puerto Rico's water and sewer company announced Wednesday that it would spend about $200,000 over three months on a pilot project to use "cloud seeding" in hopes of creating rain clouds over three of the island's main reservoirs.
If Puerto Rico does not receive significant rainfall this week, tens of thousands of clients who depend on the Carraizo reservoir will get water only every fourth day starting next week, said Alberto Lazaro, executive director of the water and sewer company.
"We are doing everything within our reach to address the situation at the reservoirs," he said. "We will not stop looking for alternatives to deal with a situation that, without a doubt, is one of the island's biggest concerns."
Forecasters blame the lack of rain on El Nino, a warming of the tropical Pacific that affects global weather and has led to a quiet Atlantic hurricane season, which began in June and ends in November.
So far this year, it has rained as much as 12 inches (31 centimeters) less than usual in San Juan and as much as 20 inches (51 centimeters) less in some areas around the Carraizo reservoir, said Carlos Anselmi, a meteorologist with the National Weather Service.
U.S. Agriculture Secretary Thomas Vilsack has declared 20 of the island's 78 municipalities as disaster zones, with farmers reporting an increase in crops shriveling and cattle dying.
The drought comes as Puerto Rico struggles in a nearly decade-long economic slump that has hit the government's coffers and led authorities to raise the sales tax, even on bottled water. Puerto Ricans also are grumbling about having to pay high water rates amid severe rationing measures.
"It's not fair," said Hector Linares, a car wash worker. But he is resigned. "You can't fight <a href="http://www.earth.com/video/puerto-rico-after-hurricane-maria/">Puerto Rico'</a>s bureaucracy."
The government has set up water trucks throughout the San Juan metropolitan area and beyond, including one at a public housing complex in a working class community in Rio Piedras.
As the truck rumbles through the Gardens of Paradise complex, Alexander Cabrera says that one of his fellow residents there has taken to yelling: "The water is here! The water is here!"
"That's when everybody comes out running. They look like ants," Cabrera said.
The drought has forced people to change their routine, with many seeking help from friends and family in places where water service has not been affected.
Jose Bonilla, a retired power company worker, said he moved in with a female friend after his service was cut. If the situation worsens, Bonilla said he would leave.
"I'm on the first flight out, to Santo Domingo or <a href="https://www.bing.com/search?q=new+york+times&amp;cvid=eb94a288ea4c4041aa6df1a34e9e22d6&amp;FORM=ANAB01&amp;PC=HCTS">New York</a>," he said.
But other Caribbean spots also are struggling with drought, including the Dominican Republic, Jamaica and St. Lucia. It is the region's worst drought in five years.
Vegazo, who has the roof-repair company, said he and his family are not thinking of leaving. They have attended a free course at their church on how to live with a minimum amount of water.
"We'll just get another barrel of water and keep on going," he said. "We're depending on God."
---
Danica Coto on Twitter: <a href="http://www.twitter.com/danicacoto" target="_blank" rel="noopener noreferrer">www.twitter.com/danicacoto</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.

Puerto Ricans Face Severe Drought And Economic Slump

Puerto Ricans Face Severe Drought And Economic Slump. Puerto Ricans...

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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



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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.

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;



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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.

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;



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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"

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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



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Satellites reveal how Earth's systems are interconnected

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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



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.

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...