When marathon runners train, their minds typically focus on mileage, nutrition, and gear. Yet recent research from the Brown University School of Public Health suggests that runners may also need to think about the air they breathe on race day.&nbsp;



According to a new study published in <a href="https://link.springer.com/article/10.1007/s40279-024-02160-8" target="_blank" rel="noreferrer noopener">Sports Medicine</a>, higher levels of fine particulate matter in the air are linked to slower average marathon finish times.



“Runners at that level are thinking about their gear, their nutrition, their training, the course, even the weather,” said study author Elvira Fleury, who conducted the research while enrolled as a graduate student at <a href="https://www.brown.edu/" target="_blank" rel="noreferrer noopener">Brown University</a> and is now a doctoral student at <a href="https://www.harvard.edu/" target="_blank" rel="noreferrer noopener">Harvard University</a>. 



“Our results show that those interested in optimizing <a href="https://www.earth.com/news/mental-fatigue-impairs-athletic-performance/" target="_blank" rel="noreferrer noopener">athletic performance</a> should consider the effect of <a href="https://www.earth.com/news/understanding-how-air-pollution-forms-may-help-us-prevent-it/" target="_blank" rel="noreferrer noopener">air pollution</a>, as well.”



<h2 class="wp-block-heading" id="h-large-scale-analysis-across-major-marathons">Large-scale analysis across major marathons</h2>



The study drew on finish times from 1,506,137 male and 1,058,674 female participants who ran in nine major marathons throughout the United States - including Boston, Houston, and Los Angeles - between 2003 and 2019.&nbsp;



By combining publicly available race data with a sophisticated statistical model developed by Allan Just, an associate professor of epidemiology and environment and society at Brown, the researchers could determine the amount of fine particulate matter at various points along each course.



“This really sophisticated spatial-temporal model of particulate matter allowed us to plot pollution at every mile of every course,” Fleury said. “Without a model like this, it wouldn't have been possible to look at so many different marathons in different states across different years.”



<h2 class="wp-block-heading" id="h-air-pollution-and-marathon-performance">Air pollution and marathon performance </h2>



Fine particulate matter, known as PM2.5, consists of airborne particles smaller than 2.5 microns in diameter and originates from sources like <a href="https://www.earth.com/news/intense-forest-fires-leave-scorched-earth-heating-the-planet-faster/" target="_blank" rel="noreferrer noopener">forest fires</a>, vehicle emissions, and industrial activities.&nbsp;



Analyzing the data, the researchers found that every 1 µg/m³ increase in PM2.5 was associated with slower finish times: on average, 32 seconds slower among men and 25 seconds slower among women. The effect was particularly evident among faster-than-median runners, suggesting that even elite athletes might be affected.



Although these time differences may seem small, Fleury pointed out that they matter greatly in elite competitions, where the margin between victory and defeat or achieving a personal record can be just a few seconds.



“Think of all the effort, time and money that a professional runner like Eliud Kipchoge put into trying to break the world record and run a marathon in less than two hours,” Fleury said. “Every second matters.”



<h2 class="wp-block-heading" id="h-marathon-runners-exposed-to-air-pollution">Marathon runners exposed to air pollution </h2>



While previous research has linked air pollution to health issues like <a href="https://www.earth.com/news/your-diet-may-save-your-life-six-key-foods-lower-the-risk-of-heart-disease/" target="_blank" rel="noreferrer noopener">heart disease</a>, lung disease, and even mortality, this study examined its impact on the athletic performances of fit, well-trained individuals.&nbsp;



The researchers suggested that exposure to air pollution could lead to increased blood pressure, constricted blood vessels, reduced lung function, respiratory discomfort, or short-term cognitive difficulties - factors that together might slow a runner’s pace.



“People who can complete a marathon are generally quite healthy, and we can assume they have honed their cardiorespiratory fitness,” said study author Joseph Braun, a professor of epidemiology at Brown’s School of Public Health.&nbsp;



“This study revealed a negative impact from air pollution, even at levels below current health-based standards, on these very healthy people. This means that air pollution can be a health risk not just for those who are elderly or susceptible - it can negatively affect even the most healthy and well-trained among us.”



<h2 class="wp-block-heading" id="h-b-roader-implications-of-the-research">Broader implications of the research </h2>



The results serve as a reminder that if air pollution can hamper marathon runners - often among the healthiest individuals - then the general population may also face health risks from polluted air.&nbsp;



The researchers concluded that efforts to lower pollution through regulation of power generation, industry, and transportation not only protect public health but may also help athletes perform at their peak.



For runners striving to set new personal records, paying attention to air quality forecasts could be one more step toward success.&nbsp;



For policymakers and environmental advocates, these findings underscore the importance of continuing efforts to reduce air pollution, ensuring a healthier environment for everyone - from elite athletes to casual joggers and beyond.



-----



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Air pollution negatively affects marathon performance

When marathon runners train, their minds typically focus on mileage, nutrition, and gear. Yet recent research from the Brown University School of Public Health suggests that runners may also need to think about the air they breathe on race day.&nbsp; According to a new study published in Sports Medicine, higher levels of fine particulate matter in the air are linked to slower average marathon finish times. “Runners at that level are thinking about their gear, their nutrition, their training, the course, even the weather,” said study author...

Deep, old water explains why Antarctic Ocean hasn't warmed. The waters surrounding Antarctica may be one of the last places to experience human-driven climate change. New research from the University of Washington and the Massachusetts Institute of Technology finds that ocean currents explain why the Antarctic Ocean has stayed at roughly the same temperature while most of the rest of the planet has warmed.
<div>

The study resolves a scientific conundrum, and an inconsistent pattern of warming often seized on by climate deniers. Observations and climate models show that the unique currents around Antarctica continually pull deep, centuries-old water up to the surface - seawater that last touched Earth's atmosphere before the machine age, and has never experienced fossil fuel-related climate change. The paper is published May 30 in Nature Geoscience.

"With rising carbon dioxide you would expect more warming at both poles, but we only see it at one of the poles, so something else must be going on," said lead author Kyle Armour, a UW assistant professor of oceanography and of atmospheric sciences. "We show that it's for really simple reasons, and ocean currents are the hero here."

Gale-force westerly winds that constantly whip around Antarctica act to push surface water north, continually drawing up water from below. The Southern Ocean's water comes from such great depths, and from sources that are so distant, that it will take centuries before the water reaching the surface has experienced modern global warming.

Other places in the oceans, like the west coast of the Americas and the equator, draw seawater up from a few hundred meters depth, but that doesn't have the same effect.

[caption id="attachment_2392835" align="alignleft" width="150"]<img class="size-thumbnail wp-image-2392835" src="http://cff1.greenatom.net/uploads/2016/05/31091626/global-warming-map-150x150.jpg" alt="Observed warming over the past 50 years" width="150" height="150" /> Observed warming over the past 50 years[/caption]

"The Southern Ocean is unique because it's bringing water up from several thousand meters [as much as 2 miles]," Armour said. "It's really deep, old water that's coming up to the surface, all around the continent. You have a lot of water coming to the surface, and that water hasn't seen the atmosphere for hundreds of years."

The water surfacing off Antarctica last saw Earth's atmosphere centuries ago in the North Atlantic, then sank and followed circuitous paths through the world's oceans before resurfacing off Antarctica, hundreds or even a thousand years later.

Delayed warming of the <a href="http://www.earth.com/news/unexpected-region-of-east-antarctica-is-rapidly-melting/">Antarctic Ocean</a> is commonly seen in global climate models. But the culprit had been wrongly identified as churning, frigid seas mixing extra heat downward. The study used data from Argo observational floats and other instruments to trace the path of the missing heat.

"The old idea was that heat taken up at the surface would just mix downward, and that's the reason for the slow warming," Armour said. "But the observations show that heat is actually being carried away from Antarctica, northward along the surface."Deep, old water explains why Antarctic Ocean hasn't warmed

In the Atlantic, the northward flow of the ocean's surface continues all the way to the Arctic. The study used dyes in model simulations to show that seawater that has experienced the most climate change tends to clump up around the North Pole. This is another reason why the Arctic's ocean and sea ice are bearing the brunt of global warming, while Antarctica is largely oblivious.

"The oceans are acting to enhance warming in the Arctic while damping warming around Antarctica," Armour said. "You can't directly compare warming at the poles, because it's occurring on top of very different ocean circulations."

Knowing where the extra heat trapped by greenhouse gases goes, and identifying why the poles are warming at different rates, will help to better predict temperatures in the future.

"When we hear the term 'global warming,' we think of warming everywhere at the same rate," Armour said. "We are moving away from this idea of global warming and more toward the idea of regional patterns of warming, which are strongly shaped by ocean currents."
###
The research was funded by the National Science Foundation and NASA. Co-authors are Aaron Donohoe and Emily Newsom at the UW, and John Marshall and Jeffery Scott at the Massachusetts Institute of Technology.

For more information, contact Armour at <a href="mailto:karmour@uw.edu">karmour@uw.edu</a> or 206-221-4402.

</div>

Deep, old water explains why Antarctic Ocean hasn't warmed

Deep, old water explains why Antarctic Ocean hasn't warmed. The...

Scientists: More grassland burning needed to maintain ecosystem. Kansas State University researchers have found a three-year absence of fire is the tipping point for the tallgrass prairie ecosystem and advise an increase in burning.
<div>

A collaborative study, recently publish in Elsevier's journal, Rangeland Ecology and Management, suggests many land managers in the Flint Hills need to increase grassland burning frequency to more than once every three years to keep the tallgrass prairie ecosystem from transitioning to woodland. The study applied 40 years of data collected at Konza Prairie Biological Station, an 8,600-acre native tallgrass prairie jointly owned by Kansas State University and The Nature Conservancy, to satellite fire maps of the Flint Hills from 2000 to 2010. Scientists: More grassland burning needed to maintain ecosystem

The satellite data used in the study -- "Assessing the Potential for Transitions from Tallgrass Prairie to Woodland: Are We Operating Beyond Critical Fire Thresholds? " -- indicated at least 50 percent of the tallgrass prairie in the Flint Hills is burned every three to four years or less frequently and is susceptible to becoming shrubland. Fire intervals greater than 10 years apart or complete fire suppression have drastic effects -- particularly in the absence of grazing.

"In this area, if we completely exclude fire, the landscape can go from tallgrass prairie to a cedar forest in as little as 30-40 years," said John Briggs, director of Konza Prairie and one of the authors of the study. "Once it gets to that point, we are not confident that fire alone is going to bring that back."

According to Briggs, also a professor of biology, the tallgrass prairie is one of the most altered ecosystems in North America with only 4 percent remaining. The grasslands are conducive to cattle ranching and provide economic stability for the area. Native grasses filter freshwater, prevent soil erosion, provide wildlife habitat for grassland birds like the prairie chicken, and mitigate nutrient loading. Briggs also said that if woody vegetation increases near human settlements, so will the chances of dangerous wildfire.

"We knew some areas around the Flint Hills were beyond these fire thresholds but we were still surprised how much of the region is susceptible to shrub and tree expansion," said Zak Ratajczak, the study's lead author and Kansas State University doctoral alumnus.

Ratajczak, now a National Science postdoctoral fellow at the University of Virginia, started comparing the results from the Konza Prairie fire experiments with the fire maps from K-State's geography researchers as part of his doctoral studies at Kansas State University. Assisting with the study were Doug Goodin, professor of geography, Lei Luo, master's student in geography, and Jesse Nippert, associate professor of biology, all from Kansas State University; Rhett Mohler, <a href="http://www.earth.com/news/nine-states-obesity-rate/">Kansas State</a> University alumnus and assistant professor of geography at Saginaw Valley State University; and Brian Obermeyer, director of The Nature Conservancy's Flint Hills Initiative.

"Prescribed fire is the most effective tool owners have to manage their land," Briggs said. "Other means, such as mechanically removing woody vegetation or using herbicides, are very expensive and very harmful. Fire is pennies per acre to implement; the other methods can be dollars per acre. That can really add up."

Managed by the university's Division of Biology, Konza Prairie has more than 50 sections of land called watersheds -- because they are partitioned based on water flow -- that are burned at varying frequencies -- from annually to every 20 years -- since the land was donated in 1971. The areas of the station with one- and two-year fire intervals have minimal large shrubs compared to a nearby watershed that is burned at three-and-a-half-year intervals and that has lost 40 percent of its area to shrub expansion.

This comparison, combined with the satellite data of the region, is one reason the researchers are advising an increase in burning in many areas, even though they realize this might stimulate discussion locally and for communities downwind.

"This comes at a time where people are really concerned about smoke and our suggestion to increase burning comes with a trade-off," Briggs said. "We are going to have more fire and more smoke, which can affect the air quality in the region and other parts of North America."

To find solutions for this problem, Briggs said land managers are working with fire cooperatives and the Kansas Flint Hills Smoke Management to find best practices and compromise. Briggs said a tour of Konza can give land managers access to research data and might help them establish collaborative practices to reduce the abundance of smoke.

"There is always a conflict to burning," Briggs said. "Most people think that the remaining tallgrass prairie should be a fenced-off preserve. They think that it will take care of itself, but this system is fire derived and historically fire maintained. Aside from the sustainable and ecological aspects, it is critical to people's livelihoods and necessary to ranching communities."
###
National Science Foundation Long-Term Ecological Research program, The Nature Conservancy, Kansas State University's Agricultural Experimental Research Station and the Division of Biology in Kansas State University's College of Arts &amp; Sciences provide funding and resources for Konza Prairie research.

</div>

Scientists: More grassland burning needed to maintain ecosystem

Scientists: More grassland burning needed to maintain ecosystem. Kansas State...

<div>

Sorghum has great potential as a biofuel. A weedy plant found on the roadside in northern Australia has stems ripe for biofuel production.

Scientists from the ARC Centre of Excellence in Plant Cell Walls at the University of Adelaide have discovered that a variety of sorghum growing wild in Australia, Arun, has the potential to yield over 10,000 litres of bioethanol per hectare per year.

In a study published in the journal PLOS ONE, the researchers assessed the stems of 12 varieties of sorghum for sugar content and ease of conversion to bioethanol. These included cultivated varieties and wild relatives, including Arun, which yielded significantly more bioethanol than other varieties.

"Two key advantages of using stem (rather than leaves or grain) to make biofuel is that we can produce this material in low input systems; and as we do not eat this part of the plant we avoid the food versus fuel debate," says Dr Caitlin Byrt, Postdoctoral Fellow in the University's School of Agriculture, Food and Wine.

Despite Arun stem containing high levels of a component thought to inhibit bioethanol production, this appears to be negated by a high level of an easily fermentable sugar. Sorghum has great potential as a biofuel

The researchers say that a large pool of untapped diversity exists in other species and subspecies of sorghum which opens new avenues of research to generate sorghum lines optimised for biofuel production.

Arcadia Biosciences - a Davis, <a href="http://www.earth.com/image/august-complex-fire-has-become-the-largest-in-californias-history/">California</a>-based agricultural technology company - is a partner in the Centre's research and is working with the Centre to commercialise these findings.

"Commercial application of this work could easily extend to production areas outside Australia," said Raj Ketkar, Chief Executive Officer of Arcadia. "We remain keenly interested in collaborating with the Centre and other partners to explore the use of sorghum as an alternative and sustainable energy source."
###
Media Contact:

Dr Caitlin Byrt (currently in Switzerland), Mobile: +61 (0) 410 159 306 <a href="mailto:caitlin.byrt@adelaide.edu.au">caitlin.byrt@adelaide.edu.au</a>

Associate Professor Rachel Burton, Program Leader (currently in Germany) Mobile: +61 (0) 419 769 713, <a href="mailto:rachel.burton@adelaide.edu.au">rachel.burton@adelaide.edu.au</a>.

Robyn Mills, Media Officer. Phone: +61 8 8313 6341, Mobile: +61 (0)410 689 084, <a href="mailto:robyn.mills@adelaide.edu.au">robyn.mills@adelaide.edu.au</a>

</div>

Sorghum has great potential as a biofuel

Sorghum has great potential as a biofuel. A weedy plant...

<div>

Shifting bird distribution indicates a changing Arctic. Shifts in the distribution of Spectacled Eiders, a predatory bird at the top of the Bering Sea's benthic food web, indicate possible changes in the Arctic's marine ecosystem, according to new research in The Condor: Ornithological Applications.

Matt Sexson of the USGS <a href="http://www.earth.com/image/dust-streams-over-the-gulf-of-alaska/">Alaska</a> Science Center and his colleagues compared recent satellite telemetry data from molting eiders with data from the mid-1990s. They found that in two of the species' four primary molting areas, the birds have shifted their range significantly in the intervening decades, and the researchers interpret this as an indicator of ecosystem change--eiders go where their prey is, and their movements could indicate big changes in the community of bottom-dwelling, cold-water-dependent invertebrates they eat.

It's easier to track marine predators than it is to track their prey, explains Sexson. "It's tough to speculate on the connection with climate change because the data are so sparse, but we know that the north Pacific is changing," he says. "There's a lot of corresponding evidence that together all says something big is happening here, and eiders provide a readily available indicator that changes are occurring."

Sexson and his colleagues spent months at a time in the remote Arctic to catch eiders on land during their breeding season, luring them into nets before making a two-hour trek back to base camp with each bird to surgically implant a satellite transmitter. "It's a lot of hard work, but it's a lot of fun," Sexson says. "I used to just flip past the eiders in bird field guides, thinking I'd never see any of these. Now five years later I'm catching them and holding them. I've really developed a love for this group of birds--how unique they are, how beautiful they are. I've just become attached."

According to the University of Maryland's Jackie Grebmeier, an expert on Arctic marine ecosystems who was not involved with the new study, "The results of this research provide an important finding of biological response of an upper-trophic-level seabird to climate warming and sea ice retreat, another piece in the puzzle to address ecosystem change in the Pacific Arctic region." As Arctic water warms, whole communities of animals are moving north--and there's only so far they can go.
###
"Shifts in the distribution of molting Spectacled Eiders (Somateria fischeri) indicate ecosystem change in the Arctic" will be available June 1, 2016 at <a href="http://www.aoucospubs.org/doi/full/10.1650/CONDOR-15-139.1" target="_blank" rel="noopener noreferrer">http://www. aoucospubs. org/ doi/ full/ 10. 1650/ CONDOR-15-139. 1</a> (issue URL <a href="http://www.aoucospubs.org/toc/cond/118/3" target="_blank" rel="noopener noreferrer">http://www. aoucospubs. org/ toc/ cond/ 118/ 3</a>).

About the journal: The Condor: Ornithological Applications is a peer-reviewed, international journal of ornithology. It began in 1899 as the journal of the Cooper Ornithological Club, a group of ornithologists in California that became the Cooper Ornithological Society.

</div>

Shifting bird distribution indicates a changing Arctic

Shifting bird distribution indicates a changing Arctic. Shifts in the...

<div>

Scientists study the effect of smoke particles on Earth's climate. A scientist at the University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science is leading an upcoming international research campaign to study a significant contributor to regional climate warming - smoke. The first-of-its-kind research experiment begins on June 1, 2016 from Ascension Island in the southeastern Atlantic Ocean. The experiment, called LASIC (Layered Atlantic Smoke Interactions with Clouds), is part of a broader international scientific collaboration led by the Atmospheric Radiation Measurement (ARM) Climate Research Facility deployment. The broad collaboration is detailed in a new article in the July <a href="http://journals.ametsoc.org/doi/pdf/10.1175/BAMS-D-15-00082.1" target="_blank" rel="noopener noreferrer">Bulletin of the American Meteorological Society</a>.

Southern Africa is the world's largest emitter of smoke particles in the atmosphere, known as biomass-burning aerosols, from the burning of grasslands and other biomass. The project will help researchers better understand the effects of widespread biomass burning on Earth's climate. Scientists study the effect of smoke particles on Earth's climate

The study will investigate how smoke particles flowing far offshore from the African continent affect the remote and cloudy southeast Atlantic climate. Smoke, which absorbs sunlight, is a warming agent in the climate system when located above a bright surface, such as clouds. The smoke overlying the southeast Atlantic provides one of the largest aerosol-based warming of climate on the planet, since the region is also home to one of the largest low-cloud decks on the planet.

"Ascension Island is an ideal location since it is very remote and allows us to sample the smoke after it is well-aged, about which less is known," said Paquita Zuidema, professor of atmospheric sciences at the UM Rosenstiel School and principal investigator of the research experiment. The long deployment time will allow us to characterize the marine low clouds both with and without the presence of smoke. This is ultimately valuable for understanding the <a href="http://www.earth.com/video/earth-from-space-houston-texas/">Earth's</a> energy balance."

By evaluating how the low clouds respond to the presence of sunlight-absorbing aerosols, scientists can better understand low cloud behavior, which is currently an uncertainty in model predictions of future climate, since no fundamental theory on low cloud processes is yet in place.

Low clouds dominate the atmosphere over the southeast Atlantic Ocean all year. Bright white cloud appears darker when viewed from above when smoke is present. The southeast Atlantic overall is brighter, not darker when smoke is present, suggesting that the clouds become thicker and more extensive when smoke is present.

Zuidema received a $365,050 seed grant from the U.S. Department of Energy to plan the study. And a $440,225 grant from NASA which further supports related aircraft investigations as part of the NASA Earth Venture Suborbital-2 ORACLES project.

NASA will complement the DOE surface-based measurements with airborne experiments during a month of each year in 2016-2018. This will allow researchers to take airborne samples of smoke particles as it ages, information that will improve satellite retrievals of this mixed smoke-cloud regime. The United Kingdom will also participate with its research aircraft, and French, Namibian, and South African scientists will collect and interpret aircraft and ground-based measurements closer to the Namibian coast.

The UM Rosenstiel School-led research team will study how smoke is transported through the atmosphere and across the Atlantic, how the aerosols change when transported, and the response of the low-lying clouds to the smoke. The information from the experiments will ultimately be used to improve global aerosol models and climate change forecasts.
###
About the University of Miami's Rosenstiel School

The University of Miami is one of the largest private research institutions in the southeastern United States. The University's mission is to provide quality education, attract and retain outstanding students, support the faculty and their research, and build an endowment for University initiatives. Founded in the 1940's, the Rosenstiel School of Marine &amp; Atmospheric Science has grown into one of the world's premier marine and atmospheric research institutions. Offering dynamic interdisciplinary academics, the Rosenstiel School is dedicated to helping communities to better understand the planet, participating in the establishment of environmental policies, and aiding in the improvement of society and quality of life. For more information, visit: <a href="http://www.rsmas.miami.edu/" target="_blank" rel="noopener noreferrer">http://www. rsmas. miami. edu</a> and <a href="http://www.climate.miami.edu/" target="_blank" rel="noopener noreferrer">http://www. climate. miami. edu</a>

</div>

Scientists study the effect of smoke particles on Earth's climate

Scientists study the effect of smoke particles on Earth's climate....

Big Sur Coast Of California

PRISM instrument brings coasts and coral into focus. A coastal scene with deep blue seas and a coral reef is beautiful to look at, but if you try to record the scene with a camera or a scientific instrument, the results are almost always disappointing. Most cameras can't "see" underwater objects in such scenes because they're so dim and wash out the glaring seashore. These problems don't just ruin vacation photos. They're a serious hindrance for scientists who need images of the coastline to study how these ecosystems are being affected by climate change, development and other hazards.

To the rescue: the new Portable Remote Imaging Spectrometer, created at NASA's Jet Propulsion Laboratory, Pasadena, California. PRISM is an <a href="http://www.earth.com/news/far-uvc-light-kills-99-9-percent-of-airborne-coronaviruses/">airborne</a> instrument designed to observe hard-to-see coastal water phenomena. In NASA's upcoming Coral Reef Airborne Laboratory (CORAL) field experiment, PRISM will observe entire reef ecosystems in more of the world's reef area – hundreds of times more -- than has ever been observed before.

"Coastal ocean science has specific requirements that had not been met with other instruments" when PRISM was initially proposed, said Pantazis Mouroulis of JPL, who designed the instrument. "At that time, it was not even known whether anyone could design an instrument with those characteristics. We had to devise new techniques for assembling and aligning the instrument, and even new technologies for the components."

With devastating coral bleaching taking place around the world, a sensor that can collect a detailed, uniform, large-scale dataset on coral reefs could hardly be more timely. "The value of doing this investigation right now is unimaginable because of the speed at which the environment is changing, and PRISM is the perfect instrument at the perfect time," said JPL's David Thompson, who is designing a computer model to use with PRISM's measurements for CORAL. "It's such a sensitive instrument -- beyond anything I've worked with before."

How it works

The PRISM instrument is a spectrometer, an instrument that splits light into its spectrum of wavelengths and measures the intensity of the light at each individual wavelength. Every type of molecule absorbs a unique combination of wavelengths, leaving dark gaps in the spectrum of light. The pattern of gaps is a sort of spectral "bar code" for that molecule. Spectrometers collect light and record these spectral patterns in it.

PRISM's spectrometer collects spectra in the visible, ultraviolet and near-infrared wavelengths, which encompass the "bar codes" for most phenomena of interest along coastlines. Because it is an airborne instrument, PRISM can measure wide swaths of coastline repeatedly in a short period of time -- important when monitoring rapidly changing conditions such as rising floodwaters -- and it creates a dataset on a regional scale, but with an amount of detail approaching what can be collected by boat-based campaigns. Boat campaigns can only produce local-scale datasets, because they are so expensive and labor intensive.

PRISM measures all spectra in the entire scene below its airborne perch. Each airborne campaign that uses the instrument can select just the spectra it needs for its area of study. For the CORAL campaign, "We're after that fraction of light that makes it all the way to the bottom of the ocean and comes back to the sensor, which carries the signal of the health of the coral reef," said Thompson. Thompson designed his computer algorithms to eliminate the unneeded light and isolate just the seafloor spectra. "You can think of it as peeling back the layers of an onion," he said. "Atmospheric haze is different from the surface glint off the ocean, which is different from light that's gone partway down into the ocean, which is different from light that's gone all the way down [to the seafloor and back]. All those other optical paths have to be eliminated in our modeling."

To test Thompson's model, the light from each "onion layer" is compared against measurements of the same thing -- the amount of atmospheric haze and the light-changing properties of the ocean water, for example -- taken aboard boats at a few points along the plane's path at the same time the instrument flies overhead. "It's critical for the math [in the model] to be tied down at different points with actual, physical measurements," Thompson said. When a shipboard measurement of the water's murkiness agrees with the model's calculation of the same thing, for example, it gives confidence that the model is correctly interpreting the spectra collected by PRISM.

How it's working

Heidi Dierssen, an oceanographer and professor at the University of Connecticut, Groton, and co-investigator in the CORAL campaign, worked on the development of PRISM and took the instrument on its first field campaign to study eelgrass in California's coastal waters. Dierssen has used many different instruments to gather coastal data in the past. When she used sensors that were optimized for land to observe the ocean, "They failed to give us good signals," she said. "When you looked at a spectrum it was often wavy, and you had to spend a lot of effort to calibrate it to what you measured in the water." When she used PRISM, "I was shocked," she said. "The first time we collected imagery, we got very good agreement with the field data. That instrument is truly a leap forward."

CORAL's project scientist, Michelle Gierach of JPL, has seen PRISM's data from Dierssen's study and used the instrument to observe ocean color (which can indicate phytoplankton presence) in the sea around Antarctica last winter. "We have only begun to scratch the surface of what PRISM is capable of doing, from eelgrass to biology within the Southern Ocean to now assessing coral reefs throughout the western tropical Pacific," she said. "Those are just some of the things that PRISM has in its arsenal. There's so much more that is possible."

NASA uses the vantage point of space to increase our understanding of our home planet, improve lives and safeguard our future. NASA uses airborne and ground-based instruments to develop new ways to observe and study Earth's interconnected natural systems. The agency freely shares this unique knowledge and works with institutions around the world to gain new insights into how our planet is changing.

For more information about NASA's Earth science activities, visit:

<a href="http://www.nasa.gov/earth" target="_blank" rel="noopener noreferrer">http://www.nasa.gov/earth</a>

PRISM instrument brings coasts and coral into focus

PRISM instrument brings coasts and coral into focus. A coastal...

California Drought

Slow-moving landslides reflect California's drying climate. Merged data from on-the-ground measurements, aerial photography, satellite imagery and satellite-radar imaging have unveiled an unexpected geological consequence of northern California's ongoing drought.
<div>

Initially, University of <a href="http://www.earth.com/news/unequal-treatment-protestors/">Oregon</a> scientists were perplexed by new satellite data that indicated that trees and rocks atop 98 slow-moving landslides in northern California's Eel River Basin were no longer flowing at historical rates seen between 1944 and the turn of the century. Many of the formations, they could see, had barely moved in the last three years.

"We realized that this slowing down of the landslides was a massive signature of California's drought," said Joshua Roering, a professor in the UO Department of Geological Sciences. "Finding this was an accident. We didn't set out to connect our research to climate. We discovered this by being frustrated by the data."

The research, led by Roering's postdoctoral researcher Georgie L. Bennett, is detailed in a paper accepted for publication in the journal Geophysical Research Letters. The findings, she said, are important to scientists monitoring landslides worldwide, including at similar sites she has visited in Italy.

Many Eel River Basin landslides have been slowly moving for thousands of years. The new study shows that the landslides, based on the 10 most-scrutinized landslides, slowed by half twice between 2009 and 2015, a period when the region experienced unprecedented drought.

Rates of historical movement vary by the size and depth of individual formations, Roering said, adding that, in general, the landslides had averaged "a few feet" annually. Small landslides are more sensitive to seasonal periods of rainfall and drought, while larger landslides more likely average out impacts from climate variability, the researchers found.

"Landslides move highways and make things really difficult for engineers all over the western U.S., and all over the world," Roering said.

Understanding the interior plumbing of landslides, especially how moisture affects "the conveyor belt" that keeps them moving along the surface is vital to maintaining safety and for projecting conditions that may indicate a catastrophic collapse that could dam a river or destroy a highway, he said.

"The landslide outflows we studied are typical in many places in the world," said Bennett, now a postdoctoral research associate with the U.S. Forest Service and Colorado State University. "This paper is important to helping understand how landslides respond to rainfall, and it provides data that should eventually help in terms of forecasting how landslides will respond to climate change. Smaller outflows are more sensitive to increasing or declining amounts of precipitation."

The study area covered an 86-square-mile stretch along the 200-mile-long river, which meanders through the coastal mountain range from just north of California's wine country to near Fortuna, where it meets the Pacific Ocean.

Data collection on such a scale had not been done before, Roering said. "The difference here is the amount of data we looked at," he said. "People have been putting equipment on landslides and watching them for years -- long before GPS and lasers. We were able to do this on a massive scale. This was a systematic look at the whole landscape -- what it's doing -- not just of one feature."

Researchers found that the rocks and soil have dried substantially, based on groundwater data gathered at one of the locations. The current lack of moisture, Roering said, means there is no longer enough lubrication to allow for movement.

This summer, his team, in collaboration with a team led by UO seismologist Amanda Thomas, will place 80 small seismometers in various locations on one of the landslides. The project aims to locate the underlying water table.

"A question now is how much water will it take, and how long will it take to get water down the depths at the base of these sliding surfaces to reduce the friction and get them to start moving again," Roering said. "The site we will be instrumenting should help us better understand the structure and plumbing of landslides."

Data merged in the research came from manual measurements of movement based on tracking trees as they surfed on the surface of earthflows between aerial photographs from 1944 to 2006 and from automatic measurements obtained through satellite pixel tracking from high-resolution imagery spanning 2009-2015. The satellite tracking was validated using the remote sensing technology interferometric synthetic aperture radar (InSAR).

Bennett, who soon will join the faculty at the University of East Anglia in England, compared the data on landslide movement from 1944 onward with an index of drought known as the Palmer Drought Severity Index.
###
Co-authors with Bennett and Roering were: former UO doctoral student Benjamin H. Mackey; Al L. Handwerger, a courtesy research associate in the Department of Geological Sciences; David A. Schmidt, a professor of earth and space sciences at the University of Washington; and Benoit P. Guillod, a researcher in the Environmental Change Institute of the University of Oxford.

The National Aeronautics and Space Administration supported the research.

Sources: Josh Roering, professor of geological sciences, 541-346-5574, <a href="mailto:jroering@uoregon.edu">jroering@uoregon.edu</a>; and Georgie Bennett, former UO postdoctoral researcher temporarily with the U.S. Forest Service and Colorado State University, 970-498-1249, <a href="mailto:georgieb@colostate.edu">georgieb@colostate.edu</a>

Note: The UO is equipped with an on-campus television studio with a point-of-origin Vyvx connection, which provides broadcast-quality video to networks worldwide via fiber optic network. There also is video access to satellite uplink and audio access to an ISDN codec for broadcast-quality radio interviews.

VIDEO: Shown is the main stem of northern California's Eel River Basin, near Alder Point. As the animation rolls, yellow polygons mark the margins of active, slow-moving landslides as mapped by the UO's Ben Mackey, Georgie Bennett and Alex Handwerger. (Courtesy of Joshua Roering) LINK: <a href="https://youtu.be/hGItNBKbcSY" target="_blank" rel="noopener noreferrer">https:/ / youtu. be/ hGItNBKbcSY</a>

UO Department of Geological Sciences: <a href="http://geology.uoregon.edu/" target="_blank" rel="noopener noreferrer">http://geology. uoregon. edu/ </a>

Roering faculty page: <a href="http://geology.uoregon.edu/profile/jroering/" target="_blank" rel="noopener noreferrer">http://geology. uoregon. edu/ profile/ jroering/ </a>

Bennett research page: <a href="https://georgielbennett.wordpress.com/" target="_blank" rel="noopener noreferrer">https:/ / georgielbennett. wordpress. com/ </a>

</div>

Slow-moving landslides reflect California's drying climate

Slow-moving landslides reflect California's drying climate. Merged data from on-the-ground...

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What happens to hydraulic fracturing wastewater on cropland. The use of hydraulic fracturing, or "fracking," has grown rapidly in the U.S. over the past 15 years -- but concerns persist that the oil and gas extraction method could harm the environment and people's health. To better understand its potential effects, scientists simulated what would happen to the wastewater produced by the technique after a spill. They published their findings in the ACS journal Environmental Science &amp; Technology.

This spring, the U.S. Energy Information Administration estimated that hydraulic fracturing accounts for two-thirds of the country's natural gas production. Customers have benefited from lower gas bills, but the technique's growth comes with some risks. The <a href="http://www.earth.com/image/cameron-peak-fire-is-now-the-largest-in-colorados-recorded-history/">Colorado</a> Oil and Gas Conservation Commission received reports of 838 spills that released a total of more than 660,000 gallons of fluids associated with fracking in 2014. Since hydraulic fracturing and, potentially, any associated spills often occur near agricultural land, Jens Blotevogel, Thomas Borch and colleagues wanted to find out whether compounds in the wastewater biodegrade or stick around in the soil where they might be taken up by crops.

The researchers tested the fates of three common hydraulic fracturing additives in agricultural topsoil. The surfactant polyethylene glycol completely degraded within 42 to 71 days. But the surfactant did not break down when combined with another hydraulic fracturing additive called a biocide at a salt concentration typical for wastewater produced during oil and gas extraction. The researchers say their findings highlight the need for further testing to better understand spills' potential effects on crops and the environment.
###
The authors acknowledge funding from <a href="http://www.colostate.edu/" target="_blank" rel="noopener noreferrer">Colorado State University</a> and by the Borch-Hoppess Fund for Environmental Contaminant Research.

The American Chemical Society is a nonprofit organization chartered by the U.S. Congress. With nearly 157,000 members, ACS is the world's largest scientific society and a global leader in providing access to chemistry-related research through its multiple databases, peer-reviewed journals and scientific conferences. Its main offices are in Washington, D.C., and Columbus, Ohio.

To automatically receive news releases from the American Chemical Society, contact <a href="mailto:newsroom@acs.org">newsroom@acs.org</a>.

Follow us: <a href="https://twitter.com/ACSpressroom" target="_blank" rel="noopener noreferrer">Twitter</a> <a href="https://www.facebook.com/pages/American-Chemical-Society-Pressroom/130342583687829" target="_blank" rel="noopener noreferrer">Facebook</a>

</div>

What happens to hydraulic fracturing wastewater on cropland

What happens to hydraulic fracturing wastewater on cropland. The use...

Antarctic coastline has been losing ice for 40 years. Part of Antarctica has been losing ice to the ocean for far longer than had been expected, satellite pictures reveal.
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A study of images along 2000km of the West <a href="http://www.earth.com/news/antarctica-is-melting-faster-than-models-predict-due-to-climate-variability/">Antarctica</a> coastline has shown the loss of about 1000km2 of ice - an area equivalent to the city of Berlin - over the past 40 years.

Researchers were surprised to find that the region has been losing ice for such a length of time. Their findings will help improve estimates of global sea level rise caused by ice melt.Antarctic coastline has been losing ice for 40 years

A research team from the University of Edinburgh analysed hundreds of satellite photographs of the ice margin captured by NASA, the United States Geological Survey (USGS) and the European Space Agency (ESA).

They found that ice has been retreating consistently along almost the entire coastline of Antarctica's Bellingshausen Sea since satellite records began.

The team also monitored ice thickness and thinning rates using data taken from satellites and the air. This showed that some of the largest changes, where ice has rapidly thinned and retreated several miles since 1975, correspond to where the ice front is deepest.

Scientists suggest the loss of ice is probably caused by warmer ocean waters reaching Antarctica's coast, rather than rising air temperatures. They say further satellite monitoring is needed to enable scientists to track progress of the ice sheet.

Their study, published in Geophysical Research Letters, was carried out in collaboration with Temple University in the US. It was supported by the Carnegie Trust for the Universities of Scotland, the Natural Environment Research Council and the ESA.

Frazer Christie, a PhD student in the University of Edinburgh's School of GeoSciences, who co-led the study, said: "We knew that ice had been retreating from this region recently but now, thanks to a wealth of freely available satellite data, we know this has been occurring pervasively along the coastline for almost half a century."

Dr Robert Bingham, also of the School of GeoSciences, said: "This study provides important context for our understanding of what is causing ice to retreat around the continent. We now know change to West Antarctica has been longstanding, and the challenge ahead is to determine what has been causing these ice losses for so long."


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Antarctic coastline has been losing ice for 40 years

Antarctic coastline has been losing ice for 40 years. Part...

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Politics often pollutes support for pro-science environmental solutions. Mentioning politics in a message about an environmental issue may turn people -- even people informed about the issue -- away from supporting a pro-science solution, according to a team of researchers.

In a study, conservative participants who were asked to react to a message about excess water runoff showed lower support for an environmental science improvement project when the message was framed around global warming terminology, according to Lee Ahern, associate professor of advertising and public relations, <a href="https://www.bing.com/search?q=penn+state&amp;cvid=720ec3b10d00462588230c58584182e9&amp;FORM=ANAB01&amp;PC=HCTS">Penn State</a>. The effect was even stronger among those conservatives with more knowledge about the issue, he added.

"It's the framing of the issue that's really important," said Ahern. "This is really a message for scientists and science communicators: don't pollute and politicize the information environment around the issue, because once you do that, people's <a href="https://www.earth.com/news/climate-threats-iowa-political/">political</a> identities are going to get engaged."

This study, along with others, has established that having more knowledge about science does not necessarily translate into more support for pro-science policies, according to Ahern, who added that, in this case, the environmental solution was to add more green surface infrastructure, such as green roofs.

The researchers, who report their findings in a recent issue of Science Communication, suggest that a reader's political and social identities can be activated when politicized terms or concepts are used in a message. This activation may then cause people to withdraw support from solutions they may have backed.

"The issue with the public's support for pro-science solutions for things like global warming, in particular, as well as other environmental issues that have socially contested policy solutions, is that the political identity of the people who are thinking about these issues often becomes activated," said Ahern, who worked with Colleen Connolly-Ahern, associate professor of advertising and public relations, Penn State and Jennifer Hoewe, assistant professor of journalism, University of Alabama.

Ahern said that all political ideologies, not just conservatives, are susceptible to this type of motivated reasoning.

"This is not unique to conservatives," said Ahern. "It works both ways. Studies have been done on other issues, for example, nuclear power and genetically modified organisms, that have shown similar effects among liberals."

The researchers suggest that scientists hoping to reach consensus on solutions should avoid political rhetoric in their communication.

"This is really a message for the scientists, not necessarily the public," said Ahern. "It's interesting for people to understand what's happening, but the people who really need to change what they are doing are the scientists and science communicators."

The researchers recruited 964 participants to take an online survey on local water quality in the Philadelphia area. The participants were asked what political party they supported and how strongly they supported the party. They were also asked to respond to questions that would group them into a range of egalitarian-hierarchical or individualist-collectivist worldviews.

The researchers measured the participants' knowledge of storm water runoff issues in Philadelphia and also used a quiz from the National Science Foundation to test their general science knowledge.

The study had two conditions. A normal condition attributed the water runoff problem to excess rain, while the global warming condition framed the problems around climate change. Statements and phrases, such as "stopping global warming will require international agreements" and "human-caused global warming," were used to frame the subject around climate issues.

Among solid or strong Democrats in the global warming condition, participants with high knowledge reported stronger willingness to pay for environmental solutions, such as adding green roofs. Solid or strong Republicans with high knowledge, on the other hand, reported stronger support in the normal condition for the environmental solutions, but not in the global warming condition. They were even more resistant to the solutions than low-knowledge Republicans.

"In fact, support among the low-knowledge Republicans increased in the global warming condition," said Ahern.
###
The William Penn Foundation supported this work.

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Politics often pollutes support for pro-science environmental solutions

Politics often pollutes support for pro-science environmental solutions. Mentioning politics...

Sentinel satellites give major support to environmental monitoring. The unprecedented frequency of Sentinel observations capture rapid changes in agricultural production from national to field scale, serving as a major support for environmental monitoring and agricultural subsidy control.

The Sentinel satellites of Europe’s environmental Copernicus programme are used, among other things, to study changes in farming on a weekly basis, with a 10 m resolution, and with a free and open data policy.

Europe’s Sentinel-1 and Sentinel-2 satellites allow us to observe subtle changes in land use. For instance, which crops are being grown and how fast or well they are developing, as well as spotting differences within single, larger fields. Sentinel <a href="https://www.earth.com/image/satellites-help-observe-glaciers-in-alaska/">satellites</a> give major support to environmental monitoring

This information can be used for different purposes – from predicting seasonal yields to preventing hunger in some parts of the world. Planning can help to mitigate an expected bad harvest, for example.

Agricultural mapping and monitoring is a key application for Earth observation because of its need for recurrent and frequent data, to produce seasonal and annual information on crop production.

The Sentinels are explicitly designed to support the implementation and monitoring of European policies, such as the Common Agricultural Policy (CAP) at national to regional scale.

The EU spends some 40% of its budget on agriculture subsidies, and whether farmers are declaring everything correctly can be checked through satellite data. The CAP aims to improve agricultural production and sustainable use of natural resources, while considering global issues such as food security and climate change.

At the recent Living Planet Symposium in Prague, ESA launched a national crop map, together with the EU’s Joint Research Centre and the Czech State Agriculture Intervention Fund, covering the Czech Republic.

“This Czech crop map is a key proof-of-concept, linking the free and open data streams from the Sentinels with Member State’s geographical data infrastructure to generate information for a broad community of users in agriculture,” says Guido Lemoine, from the Joint Research Centre.

This national presentation was conceived as a demonstration of what could be achieved in Europe, through the combined use of in-situ information from the Land Parcel Identification Systems (part of the CAP management), together with the dense time series from Sentinel-1 and Sentinel-2 satellites.

The frequent radar data coverage of Sentinel-1 alone was able to distinguish the seven main crop types in the country, including cereals, maize and rapeseed, through their distinct seasonal temporal behaviour, viewed in the data.

Lucie Šavelková from the State Agriculture Intervention Fund says, “The results of the Czech-Agri project are very promising for the implementation in daily activities of the Czech Paying Agency.

“These results indicate high potential of the use of Sentinel data in the agricultural sector, providing useful information in supporting the administration and control of the European Common Agriculture subsidies. “

Renáta Suchá, also from the Fund, adds, “The wide Sentinel data coverage means the outcomes of the activities can be monitored on the overall national and regional level, providing a framework for the analyses of impact of agricultural policies and activities on the environment.”

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<a href="http://www.esa.int" target="_blank" rel="noopener">European Space Agency</a>

Sentinel satellites give major support to environmental monitoring

Sentinel satellites give major support to environmental monitoring. The unprecedented...

Wildfire on warming planet requires adaptive capacity. Industrialized nations that view wildfire as the enemy have much to learn from people in some parts of the world who have learned to live compatibly with wildfire, says a team of fire research scientists.
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The interdisciplinary team say there is much to be learned from these "fire-adaptive communities" and they are calling on policy makers to tap that knowledge, particularly in the wake of <a href="https://www.earth.com/news/greenland-glaciers-face-a-triple-threat-from-global-warming/">global warming.</a>

Such a move is critical as climate change makes some landscapes where fire isn't the norm even more prone to fire, say the scientists in a new report published in a special issue of the Philosophical Transactions of the Royal Society B. Wildfire on warming planet requires adaptive capacity

"We tend to treat modern fire problems as unique, and new to our planet," said fire anthropologist Christopher Roos, Southern Methodist University, <a href="https://www.bing.com/search?q=dallas&amp;cvid=da09b3220f864c1b8ae22cc4ebf49e5c&amp;FORM=ANAB01&amp;PC=HCTS">Dallas,</a> lead author of the report. "As a result, we have missed the opportunity to recognize the successful properties of communities that have a high capacity to adapt to living in flammable landscapes -- in some cases for centuries or millennia."

One such society is the ethnically Basque communities in the French Western Pyrenees, who practice fire management to maintain seasonally flammable grassland, shrub and woodland patches for forage and grazing animals. But the practice is slowly being lost as young people leave farming.

Additionally, Aboriginal people in the grasslands of Western Australia use fire as part of their traditional hunting practices. Children begin burning at a very young age, and the everyday practice is passed down. These fires improve hunting successes but also reduce the impact of drought on the size and ecological severity of lightning fires.

Social institutions support individual benefits, preserve common good

Fire-adaptive communities have social institutions in place that support individual benefits from fire-maintained landscapes while preserving the common good, said Roos, whose fire research includes long-term archaeological and ecological partnerships with the Pueblo of Jemez in New Mexico.

"These institutions have been shaped by long-histories with wildfire, appropriate fire-use, and the development of social mechanisms to adjudicate conflicts of interest," said Roos, an associate professor in the SMU Department of Anthropology. "There is a wealth of tried and tested information that should be considered in designing local fire management."

The authors note that globally, a large number of people use fire as a tool to sustain livelihoods in ways that have been handed down across many generations. These include indigenous Australians and North Americans, South Asian forest dwellers, European farmers, and also hunters, farmers and herders in tropical savannahs.

Global Warming will likely bring new fire problems, more flammable landscapes

Global Warming will likely bring new fire problems, such as making some landscapes more flammable, Roos said. More effort will be required to balance conflicting fire management practices between adjacent cultures. Currently most fire-related research tends to be undertaken by physical or biological scientists from Europe, the United States and Australia. Often the research treats fire challenges as exclusively contemporary phenomena for which history is either absent or irrelevant.

"We need national policy that recognizes these dynamic challenges and that will support local solutions and traditional fire knowledge, while providing ways to disseminate scientific information about fire," Roos said.

The authors point out that one of the greatest policy challenges of fire on a warming planet are the international consequences of smoke plumes and potential positive feedbacks on climate through carbon emissions. Most infamously, wildfire smoke plumes have had extraordinary health impacts during Southeast Asian "haze" events, which result in increased hospitalization and mortality in the region.

Not all fire is a disaster; we must learn to live with and manage fire

Carbon emissions from wildfires can be as much as 40 percent of fossil fuel emissions in any given year over the last decade. Although only deforestation fires and land conversion are a net carbon source to the atmosphere, the contribution of wildfires to global carbon emissions is non-trivial and should be a formal component of international climate dialogs.

"It is important to emphasize that not all fire is a disaster and we must learn how to both live with as well as manage fire," said co-author Andrew Scott, earth sciences professor at Royal Holloway University of London.

The report, "Living on a flammable planet: interdisciplinary, cross-scalar and varied cultural lessons, prospects and challenges," was published May 23, 2016 by The Royal Society, the U.K.'s independent scientific academy.

Authors call for holistic study of fire on Earth

The authors are from the United States, Great Britain, Canada, Australia, South Africa and Spain. The synthesis emerged from four days of international meetings sponsored by the Royal Society - the first of its kind for fire sciences.

The authors advocate for greater collaboration among researchers studying all aspects of fire.

Pyrogeography -- the holistic study of fire on Earth, "may be one way to provide unity to the varied fire research programs across the globe," the authors write.

"Fire researchers across disciplines from engineering, the natural sciences, social sciences and the humanities need to develop a common language to create a holistic wildfire science," said Roos. "The magnitude of the wildfire challenges we face on a warming planet will demand greater collaboration and integration across disciplines, but our job won't be done unless we are also able to translate our research for policymakers, land managers, and the general public."
###
Other co-authors on the scientific paper include Andrew C. Scott, Claire M. Belcher, William G. Chaloner, Jonathan Aylen, Rebecca Bliege Bird, Michael R. Coughlan, Bart R. Johnson, Fay H. Johnston, Julia McMorrow, Toddi Steelman, and the Fire and Mankind Discussion Group.

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Wildfire on warming planet requires adaptive capacity

Wildfire on warming planet requires adaptive capacity. Industrialized nations that...

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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"

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

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



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



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



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



Video Credit: NASA Goddard



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



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Wetlands are a major source of methane emissions

[sendtonews key="f8fukm28Vz-2491833-12187" type="single"] Today's Video of the Day from NASA...

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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

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

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



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



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



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



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



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



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



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Tiger sharks are shifting poleward as temperatures rise

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

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



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



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



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



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



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



Video Credit: ESA&nbsp;



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



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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

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