The Arctic, known for its icy landscapes and frozen permafrost, is rapidly transforming due to the intensifying effects of climate change. As temperatures rise, a silent but potent threat emerges: methane emissions. Unlike carbon dioxide, methane is not as widely discussed, yet its impact on global warming is profound. 



A new study published in the journal Nature highlights the growing concern over methane emissions in the <a href="https://www.earth.com/news/arctic-climate-will-permanently-change-by-2050-scientists-warn/" target="_blank" rel="noreferrer noopener">Arctic</a> and their role in creating a feedback loop that could accelerate climate change.



<h2 class="wp-block-heading" id="h-why-methane-traps-more-heat">Why methane traps more heat </h2>



Methane isn’t as abundant as carbon dioxide, but it’s far more potent. Over a century, it traps 30 times more heat. 



Xin (Lindsay) Lan, a climate scientist at <a href="https://www.colorado.edu" target="_blank" rel="noreferrer noopener">CU Boulder</a>’s Cooperative Institute for Research in Environmental Sciences (CIRES), sees the urgency.



“Methane is a very potent greenhouse gas that we need to address urgently,” Lan said. “Our study suggests that a significant portion of the recent rise in atmospheric methane originates from natural <a href="https://www.earth.com/news/arctic-warming-may-fuel-the-spread-of-diseases-by-unleashing-frozen-viruses/" target="_blank" rel="noreferrer noopener">sources</a> driven by climate change. Our emission reduction efforts need to be more aggressive.”



<h2 class="wp-block-heading" id="h-arctic-methane-levels-climb-steadily">Arctic methane levels climb steadily</h2>



For years, Lan has tracked methane levels at NOAA’s <a href="https://gml.noaa.gov" target="_blank" rel="noreferrer noopener">Global Monitoring Laboratory</a> in Boulder. Methane emissions have steadily climbed since 2007. 



Scientists had pointed fingers at fossil fuels, responsible for 30% of emissions. Yet, Lan’s research points elsewhere - to tiny, ancient microbes thriving in new, warmer habitats.



Archaea - microbes that have lived for millennia in wetlands, landfills, and the guts of livestock - produce methane. They may be small, but they’re mighty emitters. Microbial emissions now make up nearly half of all global methane output. Yet, pinpointing specific sources remains tricky.



Lan isn’t just watching long-term trends. Seasonal fluctuations in methane also reveal what’s <a href="https://www.earth.com/news/arctic-meltdown-is-accelerating-global-warming-already-changing-earth-in-unimaginable-ways/" target="_blank" rel="noreferrer noopener">changing</a> underground.



<h2 class="wp-block-heading" id="h-permafrost-fuels-methane-emissions">Permafrost fuels methane emissions</h2>



Lan’s team dove into decades of data. Methane’s seasonal amplitude - the swing from highest to lowest levels in a year - is shrinking in northern latitudes. 



Why? Wetlands in the Arctic are expanding. Thawing permafrost is unlocking ancient carbon stores, creating perfect conditions for archaea.



Computer models show the Arctic’s wetlands have grown by 25% in the warmer months, feeding the microbes with more decomposing organic matter. The result: more methane.



<h2 class="wp-block-heading" id="h-the-feedback-loop-accelerates">The feedback loop accelerates</h2>



When permafrost melts, more carbon enters the <a href="https://www.earth.com/news/drastic-warming-will-transform-the-arctic-beyond-recognition/" target="_blank" rel="noreferrer noopener">atmosphere</a>. As temperatures rise, more permafrost melts. A cycle begins. Lan’s research shows that since 2007, this loop has intensified. What was once a trickle of methane is becoming a flood.



“This study, along with a few previous studies, has provided indirect evidence on potential climate feedback on methane emissions, which would be beyond our ability to control directly,” Lan said.



In previous work, Lan's team analyzed connections between today’s methane surge and dramatic warming events that ended past ice ages.



As Arctic ice sheets melted, vast stores of methane escaped, causing rapid temperature increases. That was thousands of years ago. Now, it’s happening again - but faster.



<h2 class="wp-block-heading" id="h-underestimated-methane-removal">Underestimated methane removal</h2>



Methane doesn’t linger forever. Hydroxyl (OH) radicals act like atmospheric scrubbers, breaking down methane. Lan’s team discovered that since 1984, these radicals have increased by 10%.



Unfortunately, OH levels are hard to measure - they disappear within seconds - scientists had assumed they remained constant. But Lan’s study suggests that the atmosphere has been removing more methane than previously thought.



“Our result showed that we’ve been underestimating how much methane the atmosphere has been removing, which means that there’s actually more methane being emitted than we previously estimated,” Lan said.



<h2 class="wp-block-heading" id="h-arctic-methane-feedback-loop">Arctic methane feedback loop</h2>



If the atmosphere is cleaning itself more efficiently, then methane emissions are higher than we realized. 



That’s a big problem. Emission reduction plans rely on accurate data. If those numbers are off, efforts to control methane may miss the mark.



Lan stresses that understanding methane’s sources is critical. Microbial emissions are surging, but fossil fuels still account for a major chunk of global output. 



And the Arctic’s permafrost holds double the carbon currently in the atmosphere. If warming continues, thawing permafrost could unleash catastrophic carbon releases.



“We need to aggressively cut all greenhouse gas emissions from the sources we can control,” Lan said. “We need to address the feedback loop before reaching that tipping point.”



<h2 class="wp-block-heading" id="h-urgency-amid-uncertainty">Urgency amid uncertainty</h2>



Time is not on our side. Methane’s rise mirrors past warming events, but this time, human activities amplify the effect. 



Lan’s work highlights a critical truth: the Arctic is changing faster than expected, and methane is slipping through the cracks.



Now, the question is - how much longer before the feedback loop spirals beyond control?



The study is published in the journal <a href="https://www.nature.com/articles/s41586-025-08900-8" target="_blank" rel="noreferrer noopener">Nature</a>.



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Arctic warming fuels dangerous methane feedback loop

The Arctic, known for its icy landscapes and frozen permafrost, is rapidly transforming due to the intensifying effects of climate change. As temperatures rise, a silent but potent threat emerges: methane emissions. Unlike carbon dioxide, methane is not as widely discussed, yet its impact on global warming is profound. A new study published in the journal Nature highlights the growing concern over methane emissions in the Arctic and their role in creating a feedback loop that could accelerate climate change. Why methane traps more heat Methane isn’t...

Antarctica’s future is determined by the choices we make now. Unless significant measures are taken to reduce greenhouse gas emissions, the continent of Antarctica could soon be irreversibly damaged. 

A new study conducted by an international team of researchers led by <a href="https://www.imperial.ac.uk/">Imperial College London</a> assessed Antarctica’s future under two different scenarios and found that decisions made in the next ten years will determine the full extent of how climate change impacts Antarctica.

The results, published in the journal <a href="https://www.nature.com/nature/">Nature</a>, show that unless a concerted effort is made to protect Antarctica from climate change it could cause worldwide ramifications. 

Warming temperatures could drive melting of the Antarctic ice sheet and cause catastrophic sea-level rise, as well as increase ocean acidification which would make life difficult for marine wildlife.  

For the study, the researchers modeled Antarctica’s future under both a high and low emissions scenario.

The first scenario examined how the continent would react if CO2 emissions rose unabated and governments took advantage of Antarctica’s resources through mining and tourism. 

The second scenario considered how Antarctica would fare if strict regulations were put in place to mitigate climate change and investments were made in scientific research. 

"Some of the changes Antarctica will face are already irreversible, such as the loss of some ice shelves, but there is a lot we can prevent or reverse,” said Martin Siegert, a co-author of the study. “To avoid the worst impacts, we will need strong international cooperation and effective regulation backed by rigorous science. This will rely on governments recognizing that Antarctica is intimately coupled to the rest of the Earth system, and damage there will cause problems everywhere."Antarctica’s future is determined by the choices we make now


The researchers found that if carbon emissions increase, ice sheet loss in Antarctica could contribute 25 centimeters to sea level rise by 2070. Summer sea ice would reduce by 50 percent which, combined with ice shelf collapse, would lead to an increase in freshwater in the surface waters near Antarctica and change ocean currents.

The warmer ocean temperatures would also increase ocean acidification and threaten marine wildlife.

There’s also a possibility that population increases will lead to mining operations in Antarctica and permanent tourist attractions that will degrade the environment, and lead to <a href="https://www.earth.com/news/plastic-pollution-crisis-antarctic/">pollution</a> and the introduction of invasive pests.

However, if emissions are regulated and global warming limited, it would help reduce ice sheet loss and minimize the impacts of climate change.

The study emphasizes the importance of reducing emissions and shows how much Antarctica influences the global environment. Governments must work with researchers to continue to protect and manage Antarctica’s precious and unique ecosystem. 

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com </a>Staff Writer

Antarctica’s future is determined by the choices we make now

Antarctica’s future is determined by the choices we make now....

An international team of researchers led by the <a href="https://www.adelaide.edu.au/">University of Adelaide</a> is reporting that ocean swells produced by storm winds have caused the extreme decomposition of Antarctic ice shelves in recent decades.

Study lead author Dr. Rob Massom is a research scientist at the Australian Antarctic Division and the Antarctic Climate and Ecosystems Cooperative Research Center. Dr. Massom explained that reduced sea ice coverage since the late 1980s has left ice shelves on the <a href="https://www.earth.com/image/sea-ice-antarctic-peninsula/">Antarctic Peninsula</a> exposed to ocean swells, causing them to flex and break.

“Sea ice acts as a protective buffer to ice shelves, by dampening destructive ocean swells before they reach the ice shelf edge,” said Dr. Massom. “But where there is loss of sea ice, storm-generated ocean swells can easily reach the exposed ice shelf, causing the first few kilometres of its outer margin to flex.”

“Over time, this flexing enlarges pre-existing fractures until long thin ‘sliver’ icebergs break away or ‘calve’ from the shelf front. This is like the ‘straw that broke the camel's back,’ triggering the runaway collapse of large areas of ice shelves weakened by pre-existing fracturing and decades of surface flooding."

Study co-author Dr. Luke Bennetts said that the discovery highlights a need for sea ice and ocean waves to be included in ice sheet modeling.

“The contribution of the Antarctic Ice Sheet is currently the greatest source of uncertainty in projections of global mean sea level rise,” said Dr. Bennetts. 

“Ice shelves fringe about three quarters of the Antarctic coast and they play a crucially important role in moderating sea level rise by buttressing and slowing the movement of glacial ice from the interior of the continent to the ocean.”


Dr. Bennetts explained that ice shelf disintegration does not directly contribute to sea-level rise because the ice is already floating. However, tributary glaciers move faster into the Southern Ocean after ice shelves collapse, and this does have a significant influence on the sea level.


The investigation was focused on five major ice shelf disintegrations that took place between 1995 and 2009. The experts combined satellite images and surface and ocean wave data to analyze the events, including the rapid collapse of the Larsen B Ice Shelf in 2002.

The study revealed that each disintegration event occurred when sea ice coverage was significantly reduced and ocean swells were large.


The Larsen B Ice Shelf collapsed in a matter of days, losing 1,250 square miles of ice that had been in place for 11,500 years. The disintegration of this ice led to the release of glacial ice into the ocean at a rate that was three to eight times faster over the following year.

The research is published in the journal <a href="https://www.nature.com/nature/">Nature</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Image Credit: Ian Phillips, Australian Antarctic Division

Storm-induced ocean waves caused major Antarctic ice loss

An international team of researchers led by the University of...

The plastic pollution crisis has reached the Antarctic. Plastic pollution has been called the next big environmental crisis, as our love for all things plastic has caused severe ramifications across the world. We only now are just beginning to understand how severe the problem is. As we have reported, plastic particles and debris has been found in isolated, uninhabited areas such as the <a href="https://www.earth.com/news/plastic-pollution-galapagos-islands/">Galapagos Islands</a> and the<a href="https://www.earth.com/news/mariana-trench-plastic-trash/"> Mariana Trench</a>.

Now, researchers have found microplastics in Antarctica, which is largely devoid of human life. <a href="https://www.greenpeace.org/usa/">Greenpeace</a>, the global environmental advocacy group, undertook a research project in the Antarctic to analyze the reach of plastic pollution.The plastic pollution crisis has reached the Antarctic

During the three-month expedition, researchers tested eight seawater samples for microplastics in targeted areas of Antarctica. The <a href="http://www.noaa.gov/">National Oceanic and Atmospheric Administration</a> (NOAA) defines microplastics as “small plastic pieces less than five millimeters long.” While plastic may sound safer in smaller sizes, marine animals can be more likely to eat the small pieces of plastic where it can cause internal damage and release hazardous chemical additives.

Seven of the eight seawater samples had at least one microplastic fiber per liter. The researchers collected eight samples of 2.5 liters of water. One liter in each sample was filtered for microfibers. Possible microfibers caught in the filter were examined using FT-IR microscopy.

In addition to plastic pollution, the researchers found chemical contamination in nearly all of their samples of snow. Polyfluorinated alkylated substances (PFAS) were found at the majority of the 15 sample sites. 

According to the Greenpeace report, “PFASs are a group of chemicals widely used in industrial processes and consumer products and have been linked to reproductive and developmental issues in wildlife. The snow samples gathered included freshly fallen snow, suggesting some of the hazardous chemicals were atmospheric and not from a local source. The chemicals are persistent and degrade in nature very slowly.”

The report illustrates the far-reaching and global effects of plastic and chemical contamination. Even remote regions such as the Antarctic Peninsula and Bransfield Strait tested positive for these harmful substances.

Frida Bengtsson, head of Greenpeace’s Protect the Antarctic campaign, sees this study as an opportunity to advocate for the creation of the world’s largest ocean sanctuary around the Antarctic seas. 

Bengtsson told <a href="https://www.theguardian.com/us">The Guardian</a>, “Plastic has now been found in all corners of our oceans, from the Antarctic to the Arctic and at the deepest point of the ocean, the Mariana trench. We need urgent action to reduce the flow of plastic into our seas and we need large-scale marine reserves – like a huge Antarctic ocean sanctuary which over 1.6m people are calling for – to protect marine life and our oceans for future generations.”

The EU proposed the idea for the sanctuary recently and it will be considered in October of this year at a conference of Antarctic nations. The sanctuary will protect the pristine habitat area from overfishing and climate change in addition to plastic pollution by halting industrial fishing and protecting local wildlife.

While the Greenpeace report may help to push the proposal forward and lead to further research in the area, there is still little we know about plastic pollution in the Antarctic.

“In a recent review of the presence of microplastics in polar seas, it is noted that most available data relates to the Arctic, in which the distribution and transport of microplastics has been more intensively studied to date,” the report states.

<a href="https://storage.googleapis.com/p4-production-content/international/wp-content/uploads/2018/06/4f99ea57-microplastic-antarctic-report-final.pdf">Read the full Greenpeace report here.</a>

--

By <a href="mailto:brianna.grant134@gmail.com">Brianna Lynne</a>, <a href="http://earth.com">Earth.com</a> Contributing Writer

The plastic pollution crisis has reached the Antarctic

The plastic pollution crisis has reached the Antarctic. Plastic pollution...

Experts at the <a href="https://uci.edu/">University of California, Irvine</a> have developed a new technique for predicting wintertime precipitation in the southwestern United States by analyzing summertime sea surface temperatures in the Pacific Ocean near <a href="https://www.earth.com/news/new-zealand-cull-cows/">New Zealand</a>.

“The interhemispheric teleconnection that we have discovered promises earlier and more accurate prediction of winter precipitation in California and the southwestern U.S.,” said study co-author Professor Efi Foufoula-Georgiou. “Knowing how much rain to expect in the coming winter is crucial for the economy, water security and ecosystem management of the region.”

The researchers have named their new tool the New Zealand Index. The system is based on a causal connection between sea surface temperatures in the southwestern Pacific Ocean in July and August and a change in the southern Hadley cell, a large-scale movement of air from the Equator to around the 30th parallel south.

The atmospheric circulation triggers a corresponding change east of the Philippine Islands, which then causes a strengthening or weakening of the jet stream in the Northern Hemisphere. This jet stream directly influences the amount of precipitation received in California between November and March.

“With the New Zealand Index, we can predict from late summer the likelihood of above- or below-normal winter precipitation in the southwestern U.S., with a correlation in the order of 0.7 - compared to the El Niño-Southern Oscillation technique, which has a correlation around 0.3 to 0.4,” said study lead author Antonios Mamalakis. “Our research also shows an amplification of this newly discovered teleconnection over the past four decades.”

For their investigation, the scientists analyzed sea surface temperature and atmospheric pressure in 1- and 2-degree cells around the globe from 1950 to 2015.


The team discovered persistent sea surface temperature and atmospheric pressure patterns in the southwestern Pacific Ocean that strongly corresponded with precipitation in Southern California, Nevada, Arizona, and Utah.


In the past, researchers have relied on global changes in atmospheric conditions such as an El Nino to predict future precipitation. However, forecasts based on El Nino conditions have not been as accurate in recent years, possibly due to climate change.


Tom Torgersen is the director of the National Science Foundation's Water Sustainability &amp; Climate program, which funded the research.

“Predicting drought in the southwestern U.S. is a critical issue for food production and local economies,” said Torgersen. “The discovery of an interhemispheric bridge that affects the winter U.S. jet stream holds the promise of improved precipitation predictability and drought forecasts.”

The study is published in the journal <a href="https://www.nature.com/ncomms/">Nature Communications</a>.

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Image Credit: Amir AghaKouchak, UCI

Winter rain in southwest U.S. determined by New Zealand summers

Experts at the University of California, Irvine have developed a...

International team collaborates to improve earthquake prediction. Forecasting seismic activity is an important advantage for us humans, as it allows us to better prepare for an impending earthquake or volcanic eruption. But just how accurate are these forecasts? That’s the question the <a href="http://cseptesting.org/">Collaboratory for the Study of Earthquake Predictability</a> (CSEP) is looking to answer in an article published in <a href="https://pubs.geoscienceworld.org/srl">Seismological Research Letters</a>. 

Since 2007, CSEP has been analyzing <a href="https://www.earth.com/news/leaning-tower-pisa-earthquakes/">earthquake</a> forecast models to determine the accuracy of each model in predicting seismic activity compared to its competitors. CSEP has four testing centers in California, New Zealand, Europe and Japan – with a fifth being developed in China – where CSEP’s experiments and testing procedures have helped advance our knowledge of the predictability of earthquakes.International team collaborates to improve earthquake prediction

“The fundamental idea of CSEP is simple in principle but complex in practice: forecasting models should be tested against future observations to assess their performance, thereby ensuring an unbiased test of the forecasting power of a model,” explains Danijel Schorlemmer of <a href="https://www.gfz-potsdam.de/startseite/">GFZ Potsdam</a> in Germany. 

At each testing center, earthquake forecasts — produced automatically from a collection of models — are compared with the region’s actual observed seismic activity. These experiments are held to strict rules that involve a precise description of the region being studied and the seismic recordings themselves, among other stipulations. 

These experiments assess how well the number, distribution, and magnitudes of observed earthquakes in each region match up with each model’s forecasted prediction. For example, in Italy there are three CSEP experiments currently ongoing to assess one-day, three-month, and five-year earthquake forecasts for the country. According to the study’s authors, the one-day forecasts are accurate enough to have been incorporated into Italy’s Department of Civil Protection’s seismic forecasts.

CSEP has been conducting experiments since 2008, during which there were a number of major earthquakes. The 2011 magnitude 6.2 Christchurch quake and the 2016 magnitude 7.8 Kaikoura quake provided data used to refine real-time community warnings during these earthquakes.

Researchers have also used CSEP to test candidate seismicity models to be used in forecasting. This can help newer, more advanced models have their accuracy confirmed and determine whether they are worth using in the future. Ultimately, the experiments being done by CSEP could refine our ability to predict seismic activity, and help save lives in the process.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

International team collaborates to improve earthquake prediction

International team collaborates to improve earthquake prediction. Forecasting seismic activity...

Bill Gates backs new system to absorb CO2 from the atmosphere. As you read this, vast amounts of <a href="https://www.earth.com/news/co2-emissions-cars-uk/">carbon dioxide</a> are being pumped into the air by industrial practices and the vehicles that fill up our roads. The contribution of this gas to climate change is significant, and it doesn’t seem to be halting anytime soon. But in a response to these emissions, <a href="http://carbonengineering.com/">Carbon Engineering</a> – a Canadian-based clean energy company – has outlined the design of a large industrial plant that is capable of capturing carbon dioxide from the atmosphere at a cost of $94 to $232 per ton.

Previous estimates for the cost of extracting greenhouse gases from the air were around $600 per ton, according to the <a href="https://www.aps.org/">American Physical Society</a>. This price point proposed by Carbon Engineering would be well below that.Bill Gates backs new system to absorb CO2 from the atmosphere 

“I hope to show that this as a viable energy industrial technology, not something that is a magic bullet ... but something that is completely doable,” says David Keith, a <a href="https://www.harvard.edu/">Harvard University</a> physics professor and founder of the company. 

Carbon Engineering has around 40 employees, and produces about a ton of carbon dioxide per day from their experimental plant. The company is owned by several private investors, including famous billionaire Bill Gates.

The technology for this project, outlined in the journal <a href="https://www.cell.com/joule/home">Joule</a>, makes synthetic fuels using only water, air, and renewable power. Keith believes that an industrial-scale plant would be able to make fuel at a dollar per liter, which would be competitive in California, where fuel prices are high due to the effort to reduce car pollution through low carbon fuel standards. An industrial plant could potentially capture a million tons of carbon dioxide per year, which is equivalent to the emissions of 250,000 cars.

Other experts commend the study as an advancement in clearing up major uncertainties about the costs of “direct air capture.” Reports from the United Nations suggest that governments may have to deploy similar technologies sometime this century in order to remove carbon from the atmosphere and bury it to limit global warming as part of the 2015 Paris climate agreement.

“Direct air capture is a politically promising route for carbon dioxide removal,” says Oliver Geden, of the <a href="https://www.swp-berlin.org/en/">German Institute for International and Security Affairs</a>. One of the many benefits is that an air capture plant could be built almost anywhere, as it would not impact farmland – unlike the planting of forests to take in carbon dioxide.

As we look to combat climate change in the future, these efforts will involve not only limiting our emissions, but finding ways to reverse the damage we’ve already done.

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Image Credit: <a href="http://carbonengineering.com/">Carbon Engineering</a>

Bill Gates backs new system to absorb CO2 from the atmosphere

Bill Gates backs new system to absorb CO2 from the...

LED lights last longer, but some shades are harmful to wildlife. Noise and light pollution can be harmful to natural ecosystems, and studies have shown that human-caused <a href="https://www.earth.com/news/noise-pollution-reproduction-birds/">noise pollution can disrupt habitats</a> and even drive species decline. 

Now, a new study has found that certain shades of LED (light-emitting diode) outdoor lamps can also negatively impact wildlife, and researchers have created a database for consumers to know which LED colors are the least harmful.

The team determined that blue and white LED lights are the worst for animals while softer yellows, greens, and ambers are more benign. 

The study was conducted by a team of biologists from the <a href="https://www.usc.edu/">University of Southern California </a>and published in the journal Experimental Zoology Part A: Ecological and Interactive Physiology. 

LED lamps are popular and are expected to make up 69 percent of the global market by 2020. LEDs have many benefits including conserving energy and lasting longer than other traditional lights, however, these benefits can come at a cost to wildlife.

Previous studies have examined how light brightness and direction affects species’ migration, attraction, and circadian rhythms.

The researchers collected data from these light studies to help build a new database that developers, designers, and policymakers can use to choose wildlife-friendly LED lighting colors. 

“Outdoor environments are changing rapidly and in ways that can impact wildlife species," said Travis Longcore, lead author of the study. “We provide a method to assess the probable consequences of new light sources to keep up with the changing technology.”

For the study, the researchers focused on insects, sea turtles, salmon and the Newell’s shearwater seabird.

The researchers also found that sea turtles and insects are more vulnerable to bright LED lights at night. Sea turtles can follow the bright light inland after hatching instead of going to the sea. 

In order to reduce further species decline and help protect those species most vulnerable to LED light brightness, the researchers created the "Rapid Assessment of Lamp Spectrum to Quantify Ecological Effects of Light at Night,” a <a href="https://onlinelibrary.wiley.com/journal/19325231">database</a> that shows how two dozen different types of artificial lights impact animals. 

The hope is that city planner and policymakers will use the database to help pick the least disruptive and harmful light options for species. 

“If we don't provide advice and information to decision makers, they will go with the cheapest lighting or lighting that serves only one interest and does not balance other interests,” said Longcore. “We provide a method to assess the probable consequences of new light sources to keep up with the changing technology and wildlife concerns.”

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

LED lights last longer, but some shades are harmful to wildlife

LED lights last longer, but some shades are harmful to...

Biggest iceberg ever moving toward the equator, set to disappear.  After 18 years of drifting around at sea, the world's largest iceberg will soon vanish forever near the Equator. The massive piece of ice, which was 160 nautical miles long and 20 nautical miles wide when it first broke off of the Ross Ice Shelf in <a href="https://www.earth.com/news/east-antarctica-seismically-active/">Antarctica</a> in March of 2000, has traveled 6,600 miles.

Only four pieces of iceberg B-15 remain that are at least 20 square nautical miles, which is a size that is large enough to be tracked by the National Ice Center. The iceberg set off on its journey as an ice chunk larger than the size of Jamaica, originally measuring a total of 4,250 square miles.

The huge iceberg spent most of the past 18 years floating in the cold ocean waters of the Antarctic, traveling an estimated three-quarters of the way around Antarctica. However, according to NASA, northerly winds have changed its path over the last year. Biggest iceberg ever moving toward the equator, set to disappear

The largest remaining portion of the ice chunk, which is referred to as B-15Z, has a visible fracture and is breaking down into smaller pieces. An image captured last October shows the location of B-15Z in the Southern Ocean off the tip of the Antarctic Peninsula.

By May of 2018, the iceberg was spotted in an image captured by astronauts aboard the International Space Station (ISS) in the southern Atlantic Ocean about 150 nautical miles northwest of the South Georgia islands, which is where it is predicted to rapidly melt and disappear. 


NASA glaciologist Kelly Brunt said that icebergs this close to the Equator “tend to pond with water, which then works its way through the iceberg like a set of knives.”

--

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Image Credit: <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a>

Biggest iceberg ever moving toward the equator, set to disappear

Biggest iceberg ever moving toward the equator, set to disappear. ...

A new study led by the <a href="https://www.washington.edu/">University of Washington</a> has confirmed the theory that higher temperatures associated with <a href="https://www.earth.com/news/developing-countries-global-warming/">global warming</a> will lead to smaller yields of corn across the world by the end of the century. 

The researchers also found that the variability of corn yields from year to year will increase the likelihood that high-producing regions will experience low yields simultaneously, leading to global shortages and high corn prices.

“Previous studies have often focused on just climate and plants, but here we look at climate, food and international markets,” said lead author Michelle Tigchelaar.

“We find that as the planet warms, it becomes more likely for different countries to simultaneously experience major crop losses, which has big implications for food prices and food security.”

Most people across the planet rely heavily on corn, which is the most widely grown crop in the world used for food, cooking oil, livestock feed, and fuel.

The United States, Brazil, Argentina, and the Ukraine account for 87 percent of the world's corn exports. The probability that all four of these major exporters could have a bad year at the same time is currently at around zero percent.

However, if the world experiences an additional four degrees Celsius of warming - which is the amount that has been projected to happen by the end of this century - the chance that all four major exporting countries could simultaneously have a bad year increases to 86 percent.

“Yield variability is important for determining food prices in international markets, which in turn has big implications for food security and the ability of poor consumers to buy food,” said Tigchelaar.

The researchers combined data from global climate projections with data from corn-growth models to confirm the negative impact of warmer temperatures on corn crops.

“When people think about climate change and food, they often initially think about drought, but it's really extreme heat that's very detrimental for crops,” said Tigchelaar. 

“Part of that is because plants grown at a higher temperature demand more water, but it's also that extreme heat itself negatively affects crucial stages in plant development, starting with the flowering stage and ending with the grain-filling stage.”

The study revealed that warmer temperatures will severely decrease average maize yields in the southeastern United States, Eastern Europe, and sub-Saharan Africa.

"Even with optimistic scenarios for reduced emissions of greenhouse gases, results show that the volatility in year-to-year maize production in the U.S. will double by the middle of this century, due to increasing average growing season temperature," said study co-author David Battisti.

“The same will be true in the other major maize-exporting countries. Climate change will cause unprecedented volatility in the price of maize, domestically and internationally."

The research is published in the <a href="http://www.pnas.org/">Proceedings of the National Academy of Sciences</a>.

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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

Warmer temperatures will threaten corn availability

A new study led by the University of Washington has...

100 cities are responsible for 18 percent of the world’s carbon emissions, according to a new <a href="http://citycarbonfootprints.info/">interactive map</a> of the most polluting cities on Earth. 

The tool was created as part of a study conducted by researchers from the <a href="https://www.ntnu.edu/">Norwegian University of Science and Technology</a>, and is the first time such a complete worldwide map measuring the carbon footprints of cities has ever been drawn. 

Both New York and Los Angeles are in the top five list of the cities with the highest carbon emission levels, while Seoul, South Korea has the number one spot.

[caption id="attachment_1215375" align="aligncenter" width="300"]<a href="https://www.earth.com/wp-content/uploads/2018/06/Screen-Shot-2018-06-12-at-9.22.16-AM.png"><img class="size-medium wp-image-1215375" src="https://www.earth.com/wp-content/uploads/2018/06/Screen-Shot-2018-06-12-at-9.22.16-AM-300x139.png" alt="" width="300" height="139" /></a> Image Credit: citycarbonfootprints.info[/caption]

For the study, the researchers surveyed the carbon footprints of 13,000 cities around the world and used current carbon footprint estimates and data from previous research. 

The researchers created an interactive map that predicts purchasing power, population, and purchasing patterns for many cities around the globe, according to <a href="https://geminiresearchnews.com/2018/05/new-study-estimates-carbon-footprints-13000-cities/">Gemini Research News</a>. 

Income was used as a proxy for measuring carbon footprint size because it’s been found that people with more to spend have a larger carbon footprint. 

The results of the study show that many cities are in a unique position to drastically reduce the world’s carbon emissions by simply controlling their own.

“The top 100 highest-footprint cities worldwide drive roughly 20 percent of the global carbon footprint,” Daniel Moran, the study’s lead author, told <a href="https://geminiresearchnews.com/2018/05/new-study-estimates-carbon-footprints-13000-cities/">Gemini</a>. “This means concerted action by a small number of local mayors and governments can significantly reduce national total carbon footprints.

Highly populated cities make up the majority of a country’s emissions, and the researchers found that large urban areas account for more than 70 percent of the world’s total energy use. 

The study lists the top polluting cities as well as the cities with the highest carbon footprint per capita. In that list, Hong Kong and cities in the United Arab Emirates have the highest rankings. 

Even in countries with low emissions per capita, an individual city with a high carbon footprint can have a big impact, and 41 of the cities in the top 200 highest polluters come from low emission countries. 

This just further shows how much power a city can have in influencing carbon footprints and <a href="https://www.earth.com/news/global-trade-boom-co2-emissions/">emissions</a>. 

“The fact that carbon footprints are highly concentrated in affluent cities means that targeted measures in a few places and by selected coalitions can have a large effect covering important consumption hotspots,” said Moran. 

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By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

New map reveals the cities with the highest carbon footprint

100 cities are responsible for 18 percent of the world’s...

Climate change could make leafy greens, veggies less available. With both global temperatures and demand for food set to to increase in the coming years, while water resources grow more strained, the impacts on agriculture and crops could cause catastrophic food scarcity.

A new study led by researchers from the <a href="https://www.lshtm.ac.uk/">London School of Hygiene and Tropical Medicine </a>reveals how climate change will affect the production and nutritional quality of vegetables and legumes.

Leafy greens, vegetables like tomatoes, and legumes are a crucial part of a healthy diet, however, these crops have been largely left out of climate change and agriculture studies.

Instead, the majority of research on crops show that increases in temperature and water scarcity will significantly change staple yields of rice and wheat.  

The study, which was the first of its kind to address this gap in climate change and agriculture research, was published in the journal Proceedings of the National Academy of Sciences. 

The researchers reviewed studies published since 1975 that investigated the impacts of environmental changes on vegetable and legume crop yields.

After examining all the past experiments and studies, the researchers then estimated how increases in greenhouse gases and water scarcity would impact future yields and nutritional quality.

The results show that if nothing is done to mitigate climate change and reduce emissions, vegetable crop yields could be reduced by 35 percent, and legumes by nine percent towards to the end of the century.

“Our study shows that environmental changes such as increased temperature and water scarcity may pose a real threat to global agricultural production, with likely further impacts on food security and population health,” said Pauline Scheelbeek, the study’s lead author.

Vegetables are an essential part of a healthy diet, and many health experts and climate studies urge people to increase their consumption of leafy greens and <a href="https://www.earth.com/news/meat-and-seafood-production-have-a-high-environmental-cost/">reduce red meat in their diets</a> to lower their environmental impact.

However, this research shows that vegetable and legumes may soon be less readily available which could impact population health worldwide.

“Our analysis suggests that if we take a 'business as usual' approach, environmental changes will substantially reduce the global availability of these important foods,” said Alan Dangour, the study’s senior author. “Urgent action needs to be taken, including working to support the agriculture sector to increase its resilience to environmental changes and this must be a priority for governments across the world.”

The researchers emphasize the importance of improving agricultural innovations as well as reducing emissions and mitigating the impacts of climate change.

“This excellent review highlights that some of the most important foods, and some of the world's most vulnerable people, are at highest risk. This research is a wake-up call, underlining the urgency of tackling climate change and of improving agricultural practices,” said Howie Frumkin, head of Our Planet, Our Health Program part of the <a href="https://wellcome.ac.uk/home">Wellcome Trust</a>, which funded the study.

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By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

Climate change could make leafy greens, veggies less available

Climate change could make leafy greens, veggies less available. With...

Scientists underestimated how quickly oceans are losing oxygen. The world’s oceans are <a href="https://www.earth.com/news/ocean-deoxygenation-history-repeating/">losing oxygen</a>, but the technology to model this loss and project future rates of deoxygenation is insufficient, according to a new study. 

Recent research has found that the oceans have already lost two percent of their oxygen content worldwide in the past fifty years, and deoxygenation is expected to increase in the future. 

Now, a new study conducted by researchers from the <a href="https://www.geomar.de/en">GEOMAR Helmholtz Centre for Ocean Research Kiel</a> shows how current methods to measure deoxygenation and identify drivers of oxygen loss need improvement. 

The study was published in the journal Nature Geoscience, and the research shows why current models for deoxygenation are limited while also listing several drivers of oxygen loss that previous research had underestimated. 

“The comparison with our observation data reveals various inadequacies of the models and gives us indications in which direction we must concentrate our research efforts,” said Peter Brandt, the study’s co-author.

Global warming driver of ocean deoxygenation, but because there are so many different processes at work in the world’s oceans, it is difficult to accurately illustrate the full scope of how warming affects these different processes. 

“We often lack the data or the knowledge about many processes that interact in the ocean's response to global warming,” said Andreas Oschlies, the lead author of the study. “Our study shows that previous models significantly underestimate the effects of this interaction, at least on the oxygen distribution.”

One way that warmer temperatures affect ocean oxygenation is through oxygen solubility in the water. As the surface layers of the ocean warm up, fewer gases are able to be stored in the water. 

This process explains around 20 percent of deoxygenation in the ocean so far and models are able to efficiently represent solubility.  

However, models are less able to show how warmer temperatures affect the patterns of global ocean circulation which consists of both deep and shallow currents that supply oxygen to different layers of the ocean. 

“Many models have problems to describe this effect realistically because transport processes are often not resolved well enough or reproduced incorrectly,” said Lothar Stramma, a fellow co-author of the research. 

If climate change is a major driver of oxygen loss, it will impact both oxygen and carbon storage in the world’s oceans in the future. 

“We need multidisciplinary process studies to better understand the delicate balance of oxygenation and oxygen consumption in the ocean,” said Oschlies. “therefore, international initiatives such as the Global Ocean Oxygen Network are helpful. Oxygen is ideal for calibrating models that calculate the uptake of carbon dioxide by the ocean. So, at the same time, we would improve our knowledge of the carbon cycle.” 

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.google.com/earth/">Earth.com</a> Staff Writer

Scientists underestimated how quickly oceans are losing oxygen

Scientists underestimated how quickly oceans are losing oxygen. The world’s...

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

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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 



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

Lesotho: Africa's "Kingdom in the Sky"

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



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



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



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



Video Credit: NASA Goddard



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



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Wetlands are a major source of methane emissions

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



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



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



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



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



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



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



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



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



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



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The rapid retreat of the Columbia Glacier

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



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



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



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



Video/ Image Credit: NASA Goddard



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



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2022 illustrated the consequences of a warming climate

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Satellites reveal how Earth's systems are interconnected

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

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



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



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



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



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



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



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



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Tiger sharks are shifting poleward as temperatures rise

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

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



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



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



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



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



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



Video Credit: ESA&nbsp;



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



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Melt ponds on the Greenland Ice Sheet

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



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



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



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



Video Credit: ESA



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



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Tracking changes in Earth's water cycle

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

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



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



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



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



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



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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Mysterious "spoke season" captured on Saturn

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

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



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



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



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



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



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



Video Credit: NTU Singapore



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



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

Plants help remove heavy metals from contaminated soil

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



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



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



Video Credit: American Chemical Society&nbsp;



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



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

Weeds are becoming increasingly resistant to herbicides

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



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



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



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



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



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



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



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

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



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

Qeshm Island in the Strait of Hormuz

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



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



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



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



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



Video/ Image Credit: ESA



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



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

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



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

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



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

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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