Rivers worldwide now carry an invisible but potent threat - antibiotic pollution. A new study from McGill University uncovers the staggering extent of this contamination.



Researchers estimate that rivers annually receive approximately 8,500 tonnes of antibiotics - nearly a third of human consumption. Wastewater systems, designed to purify, fail to prevent these residues from infiltrating natural waterways.



As a result, antibiotic traces linger, endangering both <a href="https://www.earth.com/news/world-water-day-2025-preserving-glaciers-protecting-our-future/" target="_blank" rel="noreferrer noopener">aquatic</a> ecosystems and public health.



<h2 class="wp-block-heading" id="h-rivers-carry-antibiotic-residues">Rivers carry antibiotic residues</h2>



The flow of antibiotics through river <a href="https://www.earth.com/news/earth-day-2025-our-power-our-planet/" target="_blank" rel="noreferrer noopener">systems</a> remains relentless. Wastewater treatment plants struggle to eliminate these compounds effectively. Residues from hospitals, households, and pharmaceutical facilities continue to infiltrate rivers, accumulating over time. 



Heloisa Ehalt Macedo is a postdoctoral research fellow at <a href="https://www.mcgill.ca" target="_blank" rel="noreferrer noopener">McGill</a> and lead author of the study.



"While the amounts of residues from individual antibiotics translate into only very small concentrations in most rivers, which makes them very difficult to detect, the chronic and cumulative environmental exposure to these substances can still pose a risk to human health and aquatic ecosystems," said Macedo.



<h2 class="wp-block-heading" id="h-antibiotics-rivers-and-human-health">Antibiotics, rivers, and human health</h2>



Even at low concentrations, antibiotic residues disrupt aquatic life. Fish, algae, and microbial communities all face risks from chronic exposure. 



The accumulation of these residues alters natural microbial diversity, potentially fostering antibiotic-resistant bacteria. Over time, these changes ripple through <a href="https://www.earth.com/news/major-plastic-pollution-lurks-beneath-the-surface-of-rivers/" target="_blank" rel="noreferrer noopener">ecosystems</a>, affecting entire food webs.



<h2 class="wp-block-heading" id="h-amoxicillin-a-leading-contaminant">Amoxicillin: A leading contaminant</h2>



Amoxicillin, a commonly prescribed antibiotic, emerges as the primary contaminant in rivers. Researchers utilized a global model, corroborated by data from 877 river sites, to identify hotspots of contamination. 



Southeast Asia, where antibiotic use continues to rise, faces particular risk. Poor wastewater treatment facilities fail to mitigate the amoxicillin surge, allowing residues to reach dangerous levels in river systems.



<h2 class="wp-block-heading" id="h-unintended-environmental-consequences">Unintended environmental consequences</h2>



Antibiotics, though vital for treating infections, carry unintended environmental <a href="https://www.earth.com/news/dolphins-face-serious-threats-from-chemical-pollution-and-ocean-warming/" target="_blank" rel="noreferrer noopener">consequences</a>. The researchers stress that the study does not discourage antibiotic use. Instead, it highlights the unforeseen impacts on river ecosystems. 



"This study is not intended to warn about the use of antibiotics - we need antibiotics for global health treatments - but our results indicate that there may be unintended effects on aquatic environments and antibiotic resistance, which calls for mitigation and management strategies to avoid or reduce their implications," said study co-author Bernhard Lehner.



<h2 class="wp-block-heading" id="h-unaccounted-sources-of-contamination">Unaccounted sources of contamination</h2>



Livestock farms and pharmaceutical factories, major sources of antibiotic residues, remain unaccounted for in the study. Despite their exclusion, the findings reveal extensive contamination from human antibiotic consumption alone. 



"Our results show that antibiotic pollution in rivers arising from human consumption alone is a critical issue, which would likely be exacerbated by veterinarian or industry sources of related compounds," said Jim Nicell, an environmental engineering professor at McGill.



<h2 class="wp-block-heading" id="h-highest-river-antibiotic-contamination">Highest river antibiotic contamination</h2>



The consequences of antibiotic pollution do not spread evenly. India, China, and Pakistan account for 47% of rivers with the highest antibiotic dose concentrations. 



Rivers in densely populated regions suffer the most, as inadequate wastewater systems struggle to cope with rising antibiotic use. The study estimates that 750 million people live in close proximity to these contaminated rivers, facing the risk of exposure to antibiotic-laden water.



<h2 class="wp-block-heading" id="h-monitoring-and-mitigation">Monitoring and mitigation</h2>



Monitoring programs play a pivotal role in combating river contamination. Identifying hotspots of antibiotic pollution enables targeted intervention, preventing further environmental degradation. 



"Monitoring programs to detect antibiotic or other chemical contamination of waterways are therefore needed, especially in areas that our model predicts to be at risk," said Nicell.



However, detection alone is not enough. Upgrading wastewater treatment facilities becomes imperative, particularly in low-income regions where untreated waste flows directly into rivers. 



Implementing advanced filtration systems could significantly reduce antibiotic concentrations, safeguarding both aquatic life and human health.



<h2 class="wp-block-heading" id="h-a-global-challenge">A global challenge</h2>



Antibiotic pollution in rivers represents a pressing environmental crisis. The McGill study highlights the urgent need for comprehensive mitigation strategies. 



Addressing this issue requires a multi-faceted approach, encompassing both monitoring programs and wastewater treatment upgrades.



Unchecked, antibiotic residues will continue to accumulate in river systems, threatening biodiversity and public health. Effective solutions must target the root causes - rising antibiotic consumption, inadequate waste management, and insufficient regulation.



The study is published in the journal <a href="https://academic.oup.com/pnasnexus/article/4/4/pgaf096/8113371" target="_blank" rel="noreferrer noopener">PNAS Nexus</a>.



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Human antibiotics detected in hundreds of rivers worldwide

Rivers worldwide now carry an invisible but potent threat - antibiotic pollution. A new study from McGill University uncovers the staggering extent of this contamination. Researchers estimate that rivers annually receive approximately 8,500 tonnes of antibiotics - nearly a third of human consumption. Wastewater systems, designed to purify, fail to prevent these residues from infiltrating natural waterways. As a result, antibiotic traces linger, endangering both aquatic ecosystems and public health. Rivers carry antibiotic residues The flow of antibiotics through river systems remains relentless. Wastewater treatment plants struggle...

Carbon Emissions From Peatlands Lower Than Expected. Anti-decay adaptation may hold key to reducing CO2 emissions

Duke University scientists have discovered a previously unknown dual mechanism that slows peat decay and may help reduce <a href="https://www.bing.com/search?q=carbon+dioxide&amp;cvid=e29a3705d0914ad0b9a23509a7e07b87&amp;FORM=ANAB01&amp;PC=HCTS">carbon dioxide</a> emissions from peatlands during times of drought.

"This discovery could hold the key to helping us find a way to significantly reduce the risk that increased drought and global warming will change Earth's peatlands from carbon sinks into carbon sources, as many scientists have feared," said Curtis J. Richardson, director of the Duke University Wetland Center and professor of resource ecology at Duke's Nicholas School of the Environment.

The naturally occurring mechanism was discovered in 5,000-year-old pocosin bogs in coastal North <a href="http://www.earth.com/image/the-outer-banks-of-north-carolina/">Carolina</a>. Preliminary field experiments suggest it may occur in, or be exportable to, peatlands in other regions as well. Carbon Emissions From Peatlands Lower Than Expected

"When we took peat extracts from the southern peatlands and put them into Canadian peatlands, they slowed down decomposition there, too," said Richardson.

Peatlands are wetlands that cover only 3 percent of Earth's land but store one-third of the planet's total soil carbon. Left undisturbed, stored carbon can remain locked in their organic soil for millennia due to natural antimicrobial compounds called phenolics that prevent the waterlogged peat from decaying.

If the peat dries out, however, many scientists have theorized peatlands would switch from storing carbon to pumping it out instead.

"The accepted scientific paradigm is that prolonged drought, coupled with global warming and increased drainage of peatlands for agriculture and forestry, will lower water levels. This could cause peatlands to dry out, decay and release massive amounts of carbon back into the atmosphere," Richardson said. "Our research supports a less dire scenario. It finds that moderate long-term drought might have less impact on the release of carbon dioxide from peatlands than expected."

The reason, he said, lies buried in the peatland soil itself.

By comparing the chemistry of soil from pocosin bog peatlands in North Carolina with soil from boreal peatlands in Canada, Richardson and his team discovered a significant and previously unrecognized difference between the two.

"Southern wooded peatlands are up to 5,000 years old and have more complex plant-derived compounds that have allowed them to adapt to drought through a mechanism that regulates the buildup of phenolics and helps slow down decomposition," said Hongjun Wang, a research scientist at the Duke Wetland Center.

This natural adaptation, which was not found as abundantly in soil from boreal peatlands of the north, protects stored carbon directly by reducing decay-promoting phenol oxidase activity during short-term drought. The mechanism also indirectly protects stored carbon by spurring a shift in the peatlands' plant cover in response to moderate long-term drought. As water levels drop, plants that contain low levels of phenolics, such as sphagnum moss, ferns and sedges, are replaced by trees and shrubs, which are high in the decay-retarding compounds.

"This dual mechanism helps peat resist decay and adapt to climate change," Wang said.

He believes high-phenolic shrubs could naturally expand into northern peatlands or be introduced there as water levels drop, offering hope that scientists might be able to reduce the risk of large carbon releases.

"We still need to identify the specific aromatic components or groups of phenolics that are responsible for the decay-retarding mechanism," Richardson said. "Plants produce and contain thousands of compounds, so this may take time. But it will be worth the effort. What we learn will provide us with new approaches for managing storage and losses of carbon from millions of acres of peatlands worldwide."

---

<a href="http://www.duke.edu" target="_blank" rel="noopener">Duke University</a>

Carbon Emissions From Peatlands Lower Than Expected

Carbon Emissions From Peatlands Lower Than Expected. Anti-decay adaptation may...

Increased Atmospheric CO2 Helps Trees Use Water More Efficiently. The increase in atmospheric CO2 concentration has allowed trees across Europe to use their available water resources more efficiently, new research has shown.

Over the course of the 20th century, the so-called water use efficiency has risen nearly 20% from the increase in atmospheric CO2 concentrations.

These results, produced by an international research team, including experts from the University of Exeter, are reported in leading scientific journal Nature Climate Change.

Trees take up carbon dioxide from the air through tiny pores on their leaves called stomata and they lose water through these same pores.

When the CO2 concentration in the air increases, the size of the stomatal opening reduces to regulate the amount of carbon acquired which minimises the water lost. As a result the so-called water use efficiency increases.

In this study the researchers used measurements of carbon from tree-rings and computer models to quantify tree and forest responses to both climate variation and increased atmospheric CO2 concentrations.

"Tree-ring data provide one of the unique opportunities to obtain long-term records of ecosystem responses to climate change", said David Frank, a Dendroclimatologist at the Swiss Federal Research Institute WSL and collaborator at the Oeschger Centre for Climate Change Research, University of Bern.

The researchers used data from 23 tree ring sites spanning Morocco to Norway to quantify variation in water use efficiency - the amount of water required to produce a given amount of carbon - and a basic measure of plant and ecosystem economy. Increased Atmospheric CO2 Helps Trees Use Water More Efficiently

Professor Pierre Friedlingstein, Chair of Mathematical Modelling of Climate Systems at the University of Exeter and one of the authors of the report, said: "The observed water use efficiency increase, in response to atmospheric CO2 increase, is something we are able to reproduce with global vegetation models giving us more confidence in the whole ecosystem response to CO2.

"However, our models simulation also indicate that globally, other drivers, such as climate change and land use change, also impact on the plant hydrological cycle."

"By measuring the ratios of heavy to light carbon isotopes of tree-ring cellulose we are able to reconstruct various physiological metrics such as water use efficiency and their environmental drivers", said Kerstin Treydte co-author of this study and a specialist in tree-ring isotopes at the WSL.

On average, 100 kilograms of water released by a tree through the stomata equates to one kilogram of tree biomass created. The study showed that reduced stomatal opening increased water use efficiency by 14% in broadleaf species and by 22% in needleleaf species.

Despite the CO2 induced stomatal closure, the models showed that the consequences of a warming climate - lengthened growing seasons, increased leaf area and increased evaporation - resulted in a 5% increase in forest transpiration - the cycle of water through trees. This increase cancels out any savings in water from improved efficiency. Plants are therefore unlikely to reduce levels of atmospheric water vapour - an important greenhouse gas. It is also unlikely that plant responses to increased CO2 will substantially increase soil moisture or river run-off.

---

<a href="http://www.exeter.ac.uk/" target="_blank" rel="noopener">University of Exeter</a>

Increased Atmospheric CO2 Helps Trees Use Water More Efficiently

Increased Atmospheric CO2 Helps Trees Use Water More Efficiently. The...

Obama Administration Approves Arctic Drilling Plan. Just days ahead of a planned protest of Royal Dutch Shell's Arctic drilling program in Seattle, the company on Monday cleared a major bureaucratic hurdle to drill off Alaska's northwestern coast.
The Bureau of Ocean Energy Management approved the multi-year exploration plan in the Chukchi Sea for Shell after reviewing thousands of comments from the public, <a href="https://www.bing.com/search?q=alaska&amp;cvid=c8d63b0417c64b1daa0ac002a85fd411&amp;FORM=ANAB01&amp;PC=HCTS">Alaska</a> Native organizations and state and federal agencies.
"We have taken a thoughtful approach to carefully considering potential exploration in the <a href="http://www.earth.com/image/chukchi-sea/">Chukchi Sea</a>, recognizing the significant environmental, social and ecological resources in the region and establishing high standards for the protection of this critical ecosystem, our Arctic communities, and the subsistence needs and cultural traditions of Alaska Natives," the agency's director, Abigail Ross Hopper, said in a statement. "As we move forward, any offshore exploratory activities will continue to be subject to rigorous safety standards."
Before Shell can begin drilling this summer, the company must still obtain other permits from state and federal agencies, including one to drill from the Bureau of Safety and Environmental Enforcement and government opinions that find Shell can comply with terms and conditions of the Endangered Species Act.
Shell spokesman Curtis Smith said the approval "is an important milestone and signals the confidence regulators have in our plan. However, before operations can begin this summer, it's imperative that the remainder of our permits be practical, and delivered in a timely manner.
"In the meantime, we will continue to test and prepare our contractors, assets and contingency plans against the high bar stakeholders and regulators expect of an Arctic operator," Smith said in an email to The Associated Press.
The Port of Seattle would need to get another permit to base the Arctic drilling fleet in Seattle for about six months of the year.
Seattle Mayor Ed Murray last week said the port, a public agency, must obtain a new land-use permit from the city before Shell contractor, Foss Maritime, can use Terminal 5. Foss Maritime on Saturday said it planned to appeal to the Seattle Hearing Examiner in the next two weeks. Once filed, the examiner will set a hearing date and then issue a ruling.
Port commissioners are taking up the lease issue at a meeting Tuesday.
Meanwhile, activists plan to protest the movement of 400-foot drill ship Polar Pioneer from Port Angeles, Washington, to the Seattle port. A so-called "festival of resistance" starts Saturday and will include protesters on land and in kayaks, trying to block the ship's movements.
"We respect the choice that anyone might make to protest based on Shell's Arctic aspirations, we just ask that they do so safely and within the boundaries of the law," Smith said.
Environmental groups on Monday blasted the Bureau of Ocean Energy Management for providing the permit to Shell.
"This decision places big oil before people, putting the Arctic's iconic wildlife and the health of our planet on the line," Erik Grafe, an attorney for Earthjustice, said in a statement. "The agency should not be approving such threatening plans based on a rushed and incomplete environmental and safety review. Ultimately, Arctic Ocean drilling is far too risky and undermines the administration's efforts to address climate change and transition to a clean energy future."
Shell's drilling plan proposes to drill up to six wells within the Burger Prospect, located about 70 miles northwest of the village of Wainwright, Alaska. The wells would be drilled in about 140 feet of water by the Polar Pioneer and the Noble Discoverer. Both vessels would provide relief-well capability for the other.
Shell has said the two ships will leave the Chukchi Sea at the end of each drilling season.
Arctic offshore reserves are estimated at 26 billion barrels of recoverable oil and 130 trillion cubic feet of natural gas, according to U.S. Geological Survey estimates.
---
Associated Press reporter Phuong Le in Seattle contributed to this report.
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Obama Administration Approves Arctic Drilling Plan

Obama Administration Approves Arctic Drilling Plan. Just days ahead of...

Sea-Level Rise Is Accelerating Due To Faster Antarctic Ice Melt. Sea-level rise is accelerating, not declining as some have hoped, scientists said on Monday citing melt water from <a href="http://www.earth.com/news/earths-temperature-could-reach-a-tipping-point-within-20-to-30-years/">Earth's</a> ice sheets as the likely cause.

In 2013, the UN's Intergovernmental Panel on Climate Change (IPCC) said the global mean sea level rose by 19 centimetres (7.6 inches) from 1901-2010, an average 1.7 mm (0.06 of an inch) per year.

This accelerated to 3.2 mm per year between 1993 and 2010, the IPCC said in its landmark Fifth Assessment Report. Sea-Level Rise Is Accelerating Due To Faster Antarctic Ice Melt

But in 2014, another study raised a big question.

In the past decade, it said, sea-level rise had been much lower than the previous decade.

That raised hopes in some quarters that, far from being an inexorably rising threat, sea levels could fluctuate in response to some hidden but natural variability.

The new study deals a blow to this scenario.

Both the IPCC estimate and the 2014 paper were based on satellite observations of sea levels.

But they were unable to take an important variable into account: something called vertical land motion.

This is natural movement in the height of the Earth's land surface, which can happen through subsidence, earthquakes or uplift.

For instance, parts of the northern hemisphere are still rising after the end of the last Ice Age -- the land was crushed by glacial weight and even today is slowly "rebounding," thousands of years after the ice melted.

The new study, published in the journal Nature Climate Change, takes land movement into account, along with an important statistical tweak -- hourly data from a network of tide gauges deployed around the world's oceans.

It finds that the overall rate of sea level rise between 1993 and mid-2014 is between 2.6 and 2.9 mm per year, with a margin of error of plus or minus 0.4 mm.

The bad news is that the first six years of the satellite data -- 1993 to 1999 -- is the period that is most affected by these corrections.

For those six years, estimates have to be scaled down by 0.9-1.5 mm a year.

That mean in more recent years the rate of sea-level rise has actually increased rather than declined, according to the paper, led by Christopher Watson of the University of Tasmania, Australia.

The acceleration "is higher than the observed twentieth-century acceleration but in reasonable agreement with an accelerating contribution from the Greenland and West Antarctic ice sheets over this period," the team said.

It is also consistent with the IPCC's projections for an additional 0.07 mm rise in the early decades of the 21st century, they added.

The IPCC projected that the global mean sea level would rise by between 40 and 63 cm by the end of this century, depending on how much heat-trapping carbon gases are emitted.

These figures do not include margin of error. At the top end of the range, the 63 cm could be as high as 82 cm.

Ocean rise has huge implications for the hundreds of millions of people who are coastal dwellers.

Their cities could be threatened by ground erosion, flooding and storm surges, and their groundwater imperilled by saltwater intrusion.

But it is also one of the most vexed questions in climate science, given the many uncertainties.

Computer models have to try to estimate how much of the rise is due to thermal expansion -- warming of the water -- or to runoff from ice sheets, glaciers or permafrost.

They also have to calculate the extreme time it takes for a vast body of water to respond to temperature change.

The IPCC said the loss of Greenland's ice sheet had probably increased from 34 billion tonnes per year in the decade to 2001 to 215 billion tonnes a year over the following decade.

In Antarctica, the rate of loss likely increased from 30 billion tonnes a year to 147 billion tonnes a year over the same timescale.

---

Credit: AFP/IPCC

Sea-Level Rise Is Accelerating Due To Faster Antarctic Ice Melt

Sea-Level Rise Is Accelerating Due To Faster Antarctic Ice Melt....

Arctic OffShore Drilling

Shell Plans To Tow Oil Rig To Seattle Despite Mayor's Warning. A giant floating oil rig currently anchored off Port Angeles, Washington, will be towed to <a href="https://www.bing.com/search?q=seattle&amp;cvid=449880354996454baa05257dcf6281d0&amp;FORM=ANAB01&amp;PC=HCTS">Seattle</a> this week despite the Seattle mayor's assertion that the Port of Seattle can't host the rig until it gets a new land-use permit, a Royal Dutch Shell spokesman said Monday.
In an email, Shell spokesman Curtis Smith said the 400-foot-long Polar Pioneer was scheduled to arrive at the Port of Seattle's Terminal 5 "later in the week" to prepare for planned exploration in the Arctic Ocean.
Protesters in kayaks have promised to challenge the rig.
Smith said his company believes its arrangements to use the terminal are valid and disagrees with Seattle's interpretation. Shell Plans To Tow Oil Rig To Seattle Despite Mayor's Warning
Seattle Mayor Ed Murray has urged the port to reconsider its two-year, $13 million lease with Foss Maritime, a company whose client is Shell.
"This is an opportunity for the port and all of us to make a bold statement about how oil companies contribute to climate change, oil spills and other environmental disasters - and reject this short-term lease," Murray said earlier.
Murray spokesmen did not immediately return Associated Press calls and emails seeking comment Monday evening.
The mayor "expects the Port of Seattle to obtain all required city permits for Terminal 5," Murray spokesman Jason Kelly told the Peninsula Daily News in response to Shell's latest announcement.
The Seattle City Council on Monday approved a resolution encouraging the Port of Seattle to reconsider the rig-hosting deal.
"None of the parties involved, including Foss and the Port of Seattle, share the city's interpretation of how T5 can be used," Shell spokesman Smith said in his email. "Furthermore, we view our lease and the supporting contract Foss has with the Port as valid."
Port commissioners planned to take up the lease issue at a meeting Tuesday.
The Polar Pioneer is one of two drill rigs Shell plans to use this summer for exploratory drilling in the Chukchi Sea off Alaska's northwest coast. Smith said the second rig, the Noble Discoverer, was headed for the Port of Everett, Washington.
The Bureau of Ocean Energy Management on Monday approved a multi-year Chukchi exploration plan for Shell.
Shell must still obtain other permits from state and federal agencies, including one to drill from the Bureau of Safety and Environmental Enforcement. Both BOEM and BSEE are agencies of the U.S. Department of Interior. The company must also obtain government opinions that find Shell can comply with terms and conditions of the Endangered Species Act.
The Bureau of Ocean Energy Management acted after reviewing thousands of comments from the public, Alaska Native organizations and state and federal agencies.
© 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.

Shell Plans To Tow Oil Rig To Seattle Despite Mayor's Warning

Shell Plans To Tow Oil Rig To Seattle Despite Mayor's...

Expansion Of Cattle Pastures Destroys Huge Swaths Of Rainforest. Expansion of cattle pastures has led to the destruction of huge swaths of rain forest in Brazil, home to the world's largest herd of commercial beef cattle. But a new study led by the University of Wisconsin-Madison's Holly Gibbs shows that market-driven "zero deforestation agreements" have dramatically influenced the behavior of ranchers and the slaughterhouses to which they sell.

Publishing today [May 12, 2015] in the journal Conservation Letters, the research team - including other UW-Madison scientists, the National Wildlife Federation, and IMAZON Amazon Institute of People and the Environment -- is the first to evaluate the impacts of these agreements, which are aimed at curbing the destruction of rain forests in Brazil.

The team found that these zero deforestation agreements prompted ranchers to swiftly register their properties in an environmental registry, led slaughterhouses to actively block purchases from ranches with recent deforestation, and saw lower deforestation rates among supplying ranches.

"We show that concurrent public and private supply-chain pressures could be a game changer, and help to finally break the link between deforestation and beef production," says Gibbs, a professor of geography and environmental studies in the Nelson Institute for Environmental Studies Center for Sustainability and the Global Environment.

However, the study also found that challenges remain to achieve zero-deforestation for beef production. Gibbs suggests that further investment by the beef industry and the Brazilian government to improve the agreements would pay high dividends for forest conservation.

Historically, expansion of cattle pastures has driven deforestation in the Brazilian Amazon, where these pastures cover about two-thirds of all the deforested land. The state of Para, where the study was based, has the largest cattle herd in the Amazon biome.

In 2009, under concurrent pressure from Greenpeace-Brazil and the federal prosecutor's office in Para, the region's largest slaughterhouse owners publicly committed to buy cattle only from those ranchers who ceased clearing rain forests and who registered their properties with Brazil's rural environmental registry.

The three largest companies -- JBS, Marfrig, and Minerva -- also vowed to set up monitoring systems to track deforestation on their supplying properties.

Gibbs and her team focused on JBS, the world's largest meatpacking company, and began by mapping the locations and land use histories of every cattle ranch that sold to JBS, before the agreements and after. They also interviewed ranchers to gain on-the-ground perspective about the changes they were or were not making following the agreements, and used rigorous statistical and spatial analysis to track changes in rancher and slaughterhouse behavior.

They found the agreements rapidly incentivized the company's supplying ranchers to register their land, as mandated by a state law in 2006. Prior to the agreements, only 2 percent of JBS' suppliers had registered their properties. However, 60 percent were registered within the first five months of the zero-deforestation agreements and by 2013, nearly all suppliers were registered.

In fact, JBS suppliers registered their properties two to three years sooner than neighboring properties that did not sell to JBS. Importantly, interviews with these suppliers revealed that 85 percent did so in order to continue selling to the company.

Additionally, Gibbs' team found clear evidence that slaughterhouses actively blocked ranches with deforestation, in sharp contrast to their practices before the agreement. For instance, the study found that before 2009, nearly 4 in 10 of JBS's direct suppliers had recent deforestation and by 2013, this number dropped to fewer than 4 in 100.

In response to these market signals, the supplying ranchers that sold to JBS after the agreements also dramatically reduced their deforestation overall and cleared only half as much rainforest as the properties JBS stopped buying from following the agreement.

"Public enforcement of environmental laws is a formidable task in the Brazilian Amazon, which covers an area six times the size of Texas," says Gibbs. "But these market-based interventions are leading to rapid changes in the beef industry within a period of months, even in very remote areas."

While these are important and encouraging results, Gibbs says much work remains to be done, since many ranchers are able to bypass the agreements. For example, the study found that slaughterhouses currently only monitor the fattening ranches from which they directly buy.

"In Brazil, cows are moved around to multiple farms before they reach the final fattening farm that sells directly to the slaughterhouse," says Gibbs.

Cattle can be calved, reared, and fattened on properties with illegal deforestation and then simply moved to another "clean" farm -- one without deforestation -- just prior to sale to JBS. Though the cattle may have spent a significant portion of their lives on farms with recent deforestation, the final ranch supplying JBS is still compliant with the agreements. This "laundering," Gibbs says, can be a shell game.

Ranchers may also bypass the agreements by selling to one of the many slaughterhouses that do not monitor their supplying properties, presenting another challenge to reducing deforestation in the beef industry.

Paulo Barreto, senior researcher at IMAZON and co-author of the paper, says the agreements need three developments to reach their full potential: First, they should involve all ranches in the cattle supply chain, including the ones specialized in calving and rearing. Second, the entire meatpacking industry should monitor its suppliers. Third, the <a href="http://www.earth.com/news/plan-manage-wild-horses/">government</a> should increase the quality and transparency of public information used by private companies to enforce the agreements. Expansion Of Cattle Pastures Destroys Huge Swaths Of Rainforest

Gibbs is encouraged by the findings and the potential for industry to help drive change through such market-driven agreements. She has observed what she calls "a gradual sea change," which has gained momentum over the last year or two.

For instance, another research study she recently published in Science describes the impact of an agreement brought about with support from major retailers, like Walmart and McDonald's, to stop buying from producers in the Brazilian Amazon that clear tropical rain forest to grow soy.

"Every few weeks we see a major global corporation come forward and commit to removing deforestation from their supply chain," says Gibbs. "These multinational companies have long profited from the exploitation of tropical forests, but they're now at the forefront of an environmental movement to reduce the deforestation caused by agricultural expansion."

---

<a href="http://www.wisc.edu/" target="_blank" rel="noopener">University of Wisconsin-Madison</a>

Expansion Of Cattle Pastures Destroys Huge Swaths Of Rainforest

Expansion Of Cattle Pastures Destroys Huge Swaths Of Rainforest. Expansion...

Oil Train Derailment North Dakota

Oil Industry Challenges Law Meant To Stop Train Explosions. The U.S. oil industry has filed a court challenge to new rules aimed at reducing the risk of catastrophic accidents involving crude moved by rail, following a string of fiery derailments in recent years.
The American Petroleum Institute petition to the U.S. Circuit Court of Appeals for the Washington, D.C., would set aside a requirement for improvements to railroad tank cars that are known to fail during accidents.
API spokesman Brian Straessle said the politically influential trade group supports better tank cars but companies need more time to get them on the tracks. Oil Industry Challenges Law Meant To Stop Train Explosions
"We definitely support upgrades to the fleet," Straessle said. "It's a matter of timing."
At least 24 oil trains have been involved in major fires or derailments over the past decade in the U.S. and Canada, including a 2013 accident in Quebec that killed 47 people. The latest derailment came last week, when a train carrying crude from the Bakken region derailed and caught fire in central <a href="https://www.bing.com/search?q=north+dakota&amp;cvid=0f255fe40cbb4176b093b6854b4ab0e7&amp;FORM=ANAB01&amp;PC=HCTS">North Dakota</a>, forcing the evacuation of a small town.
The Department of Transportation rules unveiled May 1 call for an estimated 43,000 cars that primarily haul crude to be phased out of retrofitted by 2020. Similar improvements to cars primarily carrying ethanol must be completed by 2023.
Transportation Department spokeswoman Suzi Emmerling said the rules will make crude transportation safer.
"We believe the rule will stand up to challenge in court and remain hopeful that industries impacted by these changes will accept their safety obligations and follow the new regulations," she said.
The petition filed late Monday also asks the court to set aside a requirement for advanced braking systems on fuel-hauling trains. The oil industry contends the brakes are unproven and would be too costly. <a href="http://www.earth.com/news/unhealthy-foods-spoil-the-benefits-of-a-mediterranean-diet/">Oil</a> Industry Challenges Law Meant To Stop Train Explosions
The braking rule has drawn similar objections from the rail industry, which is considering its own legal challenge to the rule, said Ed Greenberg, spokesman for Association of American Railroads.
Railroads also have concerns about tank cars, but they are the opposite of the oil industry's worries. Railroads want the cars - many of which are owned by oil companies - to be fitted with "thermal blankets" that wrap around the tank to prevent fires from spreading during a derailment.
Another challenge to the rules could come from environmental groups and safety advocates who say the deadlines set by the Transportation Department are not fast enough.
The Sierra Club and Forest Ethics are among the groups considering a court appeal or an administrative request for transportation officials to reconsider the May 1 rule, said Kristen Boyles, an attorney with the environmental law firm Earthjustice.
Also of concern is a provision exempting trains with fewer than 35 tank cars from the tougher construction requirement.
"You could have 34 crude oil cars on a train and none of them would have to meet the news standards," Boyles said.
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Oil Industry Challenges Law Meant To Stop Train Explosions

Oil Industry Challenges Law Meant To Stop Train Explosions. The...

Michigan And Enbridge Energy Reach Deal Over 2010 Oil Spill. A company responsible for one of the largest inland oil spills in U.S. history will restore or create 300 acres of wetlands as part of a sweeping agreement to improve the Kalamazoo River watershed in southwestern Michigan, state officials said.
A settlement between the state and Enbridge Energy filed in Calhoun County court Tuesday, nearly five years after a broken pipeline released more than 800,000 gallons of oil, requires the company to continue to monitor the impacts of the spill on the environment. The company also agreed to spend $75 million, much of it on various projects, including a dam removal and improved access to boating and fishing on the river. Some have been finished.
Those projects include 300 acres of wetlands valued at $30 million. Wetlands are considered to be crucial in a watershed, serving as nature's filter in absorbing and releasing water and providing habitat to fish and wildlife.
"That's huge," said Nicole Zacharda, an enforcement specialist at the Department of Environmental Quality. "They have to be within the Kalamazoo River watershed so that we keep the benefits in the same area where the injuries occurred."
The improvements are on top of Enbridge's costs directly related to the spill, which have been pegged at more than $1 billion. A pipeline ruptured in July 2010, spoiling approximately 40 miles of the Kalamazoo River and Talmadge Creek. The line runs through Michigan and carries oil between Ontario, Canada, and Griffith, Indiana.
"Everyone has this image of a river coated with oil. We've come a long way," said Mark DuCharme of DEQ's remediation division as he guided reporters on the river last week.
Indeed, there was no sign of oil on the surface during the two-hour paddle. Feisty smallmouth bass broke the surface. A blue heron glided shore to shore under the sun, and turtles warmed themselves on fallen trees.
"You're not seeing it, but we do know there's oil left in the system," DuCharme said. "It's left in the banks at some spots. It's left in the bottom of the river. But it's a little bit of oil. It truly is residual. ... You're not going to see a lot of heavy equipment out here anymore."Michigan And Enbridge Energy Reach Deal Over 2010 Oil Spill
He stopped his kayak at a wetland and shoved his paddle into the ground. A narrow sheen hit the surface, indicating a pocket of oil. DuCharme said there are no plans to excavate the site because digging up the wetland would do more harm than good. There are other similar examples in the watershed.
"That's what we're talking about when we're talking about residual oil," he said.
The agreement requires Enbridge to file monthly progress reports on cleanup and monitoring activities. It also is paying $12 million to reimburse the state for legal costs and the expense of overseeing cleanup and restoration.
"We realize some groups will jump on this settlement and say it looks small - like more money means more justice," DEQ spokesman Brad Wurfel said. "This settlement is huge, because while a few million more to the state's General Fund wouldn't do a thing to help improve the river, this settlement specifically focuses (on) creating a healthier, more accessible waterway."
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Follow Ed White at <a href="http://twitter.com/edwhiteap" target="_blank" rel="noopener">http://twitter.com/edwhiteap</a>
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Michigan And Enbridge Energy Reach Deal Over 2010 Oil Spill

Michigan And Enbridge Energy Reach Deal Over 2010 Oil Spill....

Pope Francis: God Will Judge Those Who Don't Care For Earth. Pope Francis warned the rich and powerful on Tuesday that God will judge them on whether they fed the poor and cared for the Earth, his latest exhortation on the environment ahead of his eagerly-awaited encyclical on climate change and its effects on the world's most vulnerable. Pope Francis: God Will Judge Those Who Don't Care For Earth
Francis delivered the warning during a Mass for the Vatican's Caritas Internationalis charity.
In his homily, Francis said the planet has enough food to feed the world but "it seems that there is a lack of willingness to share it with everyone."
"We must do what we can so that everyone has something to eat. But we must also remind the powerful of the<a href="http://www.earth.com/video/the-largest-collection-of-earth-scientists-on-the-planet/"> Earth</a> that God will call them to judgment one day," he said. "And there it will be revealed if they really tried to provide for him in every person, and if they did what they could to preserve the environment so that it could produce this food."
No papal document in recent times has produced as much anticipation or anxiety as Francis' encyclical, which is expected next month. Environmentalists are thrilled that Francis is lending his moral authority to provide an ethical foundation for action to stem climate change. Conservatives, including many Christians, have criticized Francis for wading into the politically charged climate debate.
On Tuesday, one of Francis' key advisers, Cardinal Oscar Rodriguez Maradiaga, said he was stunned by the complaints he had heard during a trip to the United States over a papal document that hasn't even been published yet. He accused those fueling it of an ideology "that is very strongly linked to a vision of capitalism that doesn't want to renounce damaging the environment for the sake of profits."
Francis has said global warming is "mostly" man-made and that humanity has a moral duty to stop it.
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Follow Nicole Winfield at <a href="http://www.twitter.com/nwinfield" target="_blank" rel="noopener">www.twitter.com/nwinfield</a>
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Pope Francis: God Will Judge Those Who Don't Care For Earth

Pope Francis: God Will Judge Those Who Don't Care For...

House Votes To Block EPA Clean Water Act Rules. House Republicans on Tuesday voted to block government rules that would clarify which streams, tributaries and wetlands should be protected from pollution and development under the Clean Water Act.
The rules proposed last year by the Environmental Protection Agency and the U.S. Army Corps of Engineers have fueled political anger in the country's heartland, becoming a top issue of concern for many farmers and landowners who say there are already too many government regulations affecting their businesses. House Votes To Block EPA Clean Water Act Rules
The House bill, approved 261-155, would force the EPA to withdraw the rules and further consult with state and local officials before rewriting it. The White House has threatened to veto the legislation.
The EPA says its water rules simply clarify - and don't expand - what smaller bodies of water are regulated under the Clean Water Act. Administrator Gina McCarthy says one out of three Americans gets their drinking water from sources that aren't clearly protected, and the rules would make sure those waters aren't polluted.
Republican Rep. Bill Shuster, the chairman of the House Transportation and Infrastructure Committee, said he believes the proposed EPA and Army Corps rules are "purposely vague" and that they would expand the government's authority over these small bodies of water, despite what the agency says.
"Not all waters need to be subject to federal jurisdiction," Shuster said
EPA officials have acknowledged they may not have written the proposal clearly enough, and said final rules expected in the coming months will better define which waters would fall under the law.
"I want to tell you up front that I wish we had done a better job of rolling out our clean water rule," McCarthy told the National Farmers Union in March.
The agency says the rules are necessary to make clear which waters are regulated under the Clean Water Act in the wake of decades-long uncertainty and two U.S. Supreme Court rulings on the issue. The 2001 and 2006 decisions limited regulators' reach but left unclear the scope of authority over some small waterways, like those that flow intermittently.
Democrats said blocking the rules could mean even more uncertainty for landowners who don't know if waters on their land are regulated. They said the GOP bill is premature because the EPA and Army Corps have not yet released the revised, final version of the rules.
"We're being asked to vote on killing something that nobody has read," said Democratic Rep. Peter DeFazio of Oregon.
Across the Capitol, several senators introduced a bill last month that would lay out what bodies of water should be covered under the rules and force the EPA to rewrite them by the end of next year. Sponsors included Democrats who have heard from their constituents on the proposal and said it is aggravating longstanding trust issues between rural areas and the federal government.
"It's the perfect example of the disconnect between Washington and rural areas," said Indiana Sen. Joe Donnelly of the rules. Democratic Sen. Heidi Heitkamp of North Dakota, who also backs the Senate bill, says the water rule is the number one issue she hears about from farmers.
Broadly, the EPA's proposed rules would assert federal regulatory authority over streams, tributaries, wetlands and other flowing waters that significantly affect other protected waters downstream. That means landowners would have to obtain permits for practices or development that may pollute or destroy the waters.
"We're making a targeted effort to protect the waters that matter most," McCarthy told the National Farmers Union audience.
Farm groups are particularly concerned over what they say is an overly broad definition of tributary and whether common farm ditches would be regulated. EPA says it would only regulate farm ditches that are constructed through wetlands or streams and flow year-round.
The EPA has been working to clear up misconceptions, putting to rest rumors that puddles in your back yard would be regulated, for example. Farming practices that are currently exempted from the Clean Water Act - plowing, seeding and minor drainage, among other things - will continue to be exempted.
Many landowners aren't swayed.
Missouri rancher David Luker says he's already spent thousands of dollars trying to comply with the Clean Water Act because several shallow streams run through his farm. "It seems like you can't do anything anymore without some agency being in control or having oversight over what you are doing," Luker says.
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House Votes To Block EPA Clean Water Act Rules

House Votes To Block EPA Clean Water Act Rules. House...

Microbes Serve As Markers For Environmental Contamination. ENIGMA study shows natural bacterial communities as effective geochemical biosensors

First there were canaries in coal mines, now there are microbes at nuclear waste sites, oil spills and other environmental contamination. A multi-institutional team of more than 30 scientists has found that statistical analysis of DNA from natural microbial communities can be used to accurately identify environmental contaminants and serve as quantitative geochemical biosensors. This study was sponsored by ENIGMA, a U.S. Department of Energy (DOE) Office of Science "Scientific Focus Area Program" based at the Lawrence Berkeley National Laboratory (Berkeley Lab).

"Changes induced in the natural microbial community structure by contaminants lasts long after the contaminants themselves have become undetectable," says Terry Hazen, an internationally recognized authority on microbial ecology who led the research. "This means the DNA of these microbial communities can be used as a forensic tool for measuring anthropogenic effects on the environment."

Hazen, who holds joint appointments with DOE's Oak Ridge National Laboratory (ORNL) and the University of Tennessee at Knoxville, is the corresponding author of a paper detailing the results of this ENIGMA study in mBio, the online open-access journal of the American Society for Microbiology. The paper is titled "Natural Bacterial Communities Serve as Quantitative Geochemical Biosensors." For a complete list of authors go here.

For this study, the ENIGMA collaborators identified the most independent and interesting groundwater well clusters from 25 years of monitoring data collected at the Bear Creek watershed in Oak Ridge. This watershed was a crucial site for the early development of nuclear weapons under the Manhattan Project and harbors spectacular geochemical gradients. The collaborators then collected a large number of microbial DNA samples from the identified wells in combination with 28 other physical/chemical characteristics.

"The wells we sampled typically contain a high number of particulates in the groundwater, thus causing the filters we collected DNA on to clog easily," says Andrea Rocha, a post-doctoral associate in Hazen's research group, who spent three months collecting samples from the watershed. "We had to change our filters each time they clogged until we obtained our required four liters of groundwater. Sometimes this meant changing filters five to six times for one well."

Analysis of the DNA data from the collected groundwater samples was carried out via a technique called "supervised machine-learning," which the ENIGMA team applied to high-throughput DNA sequencing data.

"Because microbial communities continuously sense and respond to their environments, they form a ubiquitous environmental surveillance network that can be inexpensively digitized through DNA sequencing," Hazen says. "Our idea was to determine whether and how information encoded in bacterial communities might be tapped to quantitatively characterize the environment."

While previous research demonstrated that specific proteins or whole bacterial cells could be used as biosensors to translate environmental signals into machine-readable data, the focus of the ENIGMA study was on the integration of information gathered from native bacterial communities containing billions of cells and encompassing thousands of taxonomic groups.

With just the sequencing data from the 16S rRNA gene alone, the ENIGMA team was able to quantitatively produce "a rich catalogue of 26 geochemical features" from 93 groundwater wells with highly differing geochemistry characteristics. These features were then used to predict contamination. The accuracy for predicting uranium contamination of the groundwater was about 88-percent, and the accuracy for predicting nitrate contamination was about 73-percent.

"Our work shows that knowing what bacteria are present allows us to infer something about the current or past chemistry of a site," says Eric Alm, an MIT microbiologist and one of the principal investigators on this project. "The next big challenge will be to understand why different bacteria are associated with different environmental conditions."

As human populations continue to grow and the industrialization of developing nations continues to expand, the impact of human activity on the environment is only going to intensify. Measuring the causes and consequences of these impacts is a challenge that science must meet. The ENIGMA project demonstrates one path towards meeting this objective.

"It takes an integrated team to tackle a large problem like this," says Paul Adams, the SFA Laboratory Research Manager for ENIGMA. "The work with these natural microbial communities highlights what can be achieved through interdisciplinary research that harnesses ENIGMA's scientific expertise in field sampling, high throughput sequencing, and computational analysis."

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<a href="http://www.lbl.gov" target="_blank" rel="noopener">Lawrence Berkeley National Laboratory</a>

Microbes Serve As Markers For Environmental Contamination

Microbes Serve As Markers For Environmental Contamination. ENIGMA study shows...

Deepwater Horizon Oil Spill Response

Deep-water drilling is set to resume near the site of the catastrophic BP oil spill blowout that killed 11 workers and caused the nation's largest offshore oil spill five years ago off the coast of Louisiana.
A Louisiana-based oil company, LLOG Exploration Offshore LLC, plans to drill into the Macondo reservoir, according to federal records reviewed by The Associated Press.
Harper's Magazine first reported the drilling plans late Tuesday.
LLOG's permit to drill a new well near BP's site was approved April 13 by the Bureau of Safety and Environmental Enforcement, an agency overseeing offshore oil and gas drilling operations. The company's exploration plan was approved last October following an environmental review by a sister agency, the Bureau of Ocean Energy Management.
The company, a privately owned firm based in Covington, Louisiana, will be looking to extract oil and gas deep under the Gulf of Mexico's seafloor, an undertaking that proved catastrophic for BP.
"Our commitment is to not allow such an event to occur again," said Rick Fowler, the vice president for deep-water projects at LLOG. "LLOG staff keeps the memory of what happened ... fresh in our minds throughout our operations, both planning and execution."
On April 20, 2010, a drilling rig owned by Transocean Ltd. and hired by BP to drill into the Macondo field experienced a series of problems that led to a massive blowout. Investigators later faulted BP and its contractors for fatal missteps.
The drilling rig, in waters about 45 miles off the Louisiana coast, was engulfed in flames. Eleven workers were killed, 17 were seriously injured and more than 100 had to be evacuated.
BP, its contractors and federal regulators struggled to contain the blowout and kill the out-of-control well over the course of the next 87 days. In all, the federal government calculated that about 172 million gallons spilled into the Gulf. BP put the number much lower, closer to 100 million gallons.
Richard Charter, a senior fellow with the Ocean Foundation and a longtime industry watchdog, said it would be cause for concern if a small company resumed drilling in the reservoir, which is located in a geographical area of the Gulf known as the Mississippi Canyon. The area, rich in oil and gas, is divided up into blocks used for drilling. BP's Macondo well was located in Mississippi Canyon Block 252.
Charter said drilling into that reservoir has proved very dangerous and highly technical, and raises questions about whether a company like LLOG has the financial means to respond to a blowout similar to BP's.
"BP had deep pockets," he said. "You don't want someone not particularly qualified and not fully amortized to be tangling with this particular dragon." He added: "When a company can't pay when something goes wrong, generally it's the public that pays."
Eric Smith, associate director of the Tulane University Energy Institute in New Orleans, dismissed those concerns. He called LLOG "an extremely well-financed and well-organized" company. He said it had an excellent reputation and was known for its veteran staff. Deep-water Drilling Set To Resume Near Site Of BP <a href="http://www.earth.com/news/fruit-eating-mammals-fertilize-the-soil-in-tropical-forests/">Oil</a> Spill
"If I were to pick anyone to go into that field after so many problems, I would pick LLOG," Smith said. "They have demonstrated their ability to drill in the area."
Since 2010, LLOG has drilled eight wells in the Mississippi Canyon area in "analogous reservoirs at similar depths and pressures," Fowler, the LLOG vice president, said. The company has drilled more than 50 wells in the Gulf since 2002, he said.
He said the company has studied the investigations into the Macondo disaster and "ensured the lessons from those reports are accounted for in our design and well procedures."
In 2014, regulators approved splitting up Mississippi Canyon Block 252. BP still owns 270 acres of the block around its disastrous Macondo well and the area where the drilling rig Deepwater Horizon and other heavy equipment lie on the seafloor. LLOG owns the block's other 5,490 acres.
BP spokesman Brett Clanton said the area owned by BP is an "exclusion zone" where oil and gas operations are off-limits both "out of respect for the victims" and to allow BP "to perform any response activities related to the accident."
John Filostrat, a spokesman for the Bureau of Ocean Energy Management, said LLOG would be the first company to attempt to tap the oil and gas reserves that BP had been seeking. He said regulators did extensive reviews of the company's drilling plans.
The exploration plan calls for drilling into Block 252 from an adjacent block by June, federal records show. The drilling will be done by the Sevan Louisiana, a semisubmersible drilling rig owned by Sevan Drilling ASA, an international drilling company based in Oslo, Norway.
LLOG's drilling plans estimate that an uncontrolled blowout from its well could cause 20,500 barrels of oil to be released each day for a total of 109 days, or the time it would take to drill a secondary well to cut off the flow.
In the event of a blowout, the company's plans call for the use of blowout preventers, containment systems and drilling a relief well to contain a spill - measures that BP relied on to tame its well.
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Deep-water Drilling Set To Resume Near Site Of BP Oil Spill

Deep-water drilling is set to resume near the site of...

Scientists are transforming chocolate into a functional food by infusing it with probiotics and prebiotics, aiming to create a treat that satisfies cravings while supporting gut health. 



The challenge lies in maintaining chocolate's beloved texture and flavor while adding health benefits.



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Probiotics - beneficial microbes that balance gut bacteria and aid digestion - are typically fragile and can be destroyed by stomach acid or processing. 



Prebiotics act as food for these microbes, helping them thrive. Together, they form "synbiotics," a powerful health combination.



Researchers Smriti Gaur and Shubhi Singh from India's Jaypee Institute of Information Technology took an innovative approach, using natural prebiotics like corn and honey instead of complex processing methods. 



They created five chocolate varieties: a control and four synbiotic versions containing different combinations of prebiotics, probiotics (Lactobacillus strains), and flavor enhancers (cinnamon or orange).



Laboratory simulations of human digestion showed the probiotics remained viable for over five hours, suggesting they could survive long enough to benefit gut health.



Taste tests were positive, with researchers particularly enjoying the orange-flavored variety, describing it as having "vibrant citrus notes" complementing the "rich cocoa" with a "luxurious" texture.



This research represents just the beginning. With further refinement of strains, textures, and flavors, chocolate could evolve beyond mere indulgence to become a functional food that nourishes while it delights.



The study is published in the journal <a href="https://pubs.acs.org/doi/10.1021/acsfoodscitech.4c00741" target="_blank" rel="noreferrer noopener">ACS Food Science &amp; Technology</a>.

Is chocolate the next nutritional powerhouse?

Scientists are transforming chocolate into a functional food by infusing...

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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



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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



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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 



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Lesotho: Africa's "Kingdom in the Sky"

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



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



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



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



Video Credit: NASA Goddard



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



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Wetlands are a major source of methane emissions

[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

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



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



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



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



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



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



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



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Tiger sharks are shifting poleward as temperatures rise

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

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



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



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



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



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



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



Video Credit: ESA&nbsp;



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



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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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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



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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



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Plants help remove heavy metals from contaminated soil

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



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



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



Video Credit: American Chemical Society&nbsp;



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



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Weeds are becoming increasingly resistant to herbicides

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



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



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



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



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



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



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



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NASA monitors giant dust storms on Mars

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



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



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



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



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



Video Credit: ESA&nbsp;



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



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Qeshm Island in the Strait of Hormuz

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



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



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



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



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



Video/ Image Credit: ESA



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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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