In the remote, icy stretches of Antarctica, the melting of a massive glacier is picking up speed. This giant, called the Thwaites Glacier, is often referred to as the Doomsday Glacier.



Since 2018, experts leading the International Thwaites Glacier Collaboration (ITGC) have been investigating the dynamics of Thwaites.



The researchers have been up close and personal with Thwaites, breaking through ice and using underwater robots to exhaustively study this massive glacier and comprehend its possible downfall.



<h2 class="wp-block-heading" id="h-retreat-of-the-doomsday-glacier">Retreat of the Doomsday Glacier </h2>



The extensive and painstaking research has unveiled some rather disconcerting findings.



<a href="https://www.earth.com/news/doomsday-glacier-relentlessly-melting-due-to-warm-water-underbelly/" target="_blank" rel="noreferrer noopener">Thwaites</a> is not just in retreat, but it's retreating at an incredible speed that is set to increase in the future, according to Rob Larter, a marine geophysicist at the British Antarctic Survey and an essential member of the ITGC team.



"Thwaites has been retreating for more than 80 years, accelerating considerably over the past 30 years, and our findings indicate it is set to retreat further and faster," noted Dr. Larter. 



<h2 class="wp-block-heading" id="h-collapse-of-the-doomsday-glacier">Collapse of the Doomsday Glacier</h2>



When it comes to future forecasts, optimism is scarce. The scientists predict that Thwaites and the Antarctic Ice Sheet could completely collapse within the next 200 years.



The Doomsday Glacier contains enough water to boost global sea levels by more than 2 feet. This amount of sea level rise could put coastal communities underwater worldwide, from Miami and London to Bangladesh and the Pacific Islands.



Making matters even worse is the fact that Thwaites acts similarly to a cork, preventing the colossal Antarctic Ice Sheet from cascading into the ocean. The collapse of the Doomsday Glacier could ultimately cause sea levels to rise by a staggering 10 feet.



<h2 class="wp-block-heading" id="h-grounding-line-of-the-thwaites-glacier">Grounding line of the Thwaites Glacier </h2>



Thwaites Glacier, with its mammoth size and perplexing characteristics, presents a formidable challenge to scientists. 



The terrain slopes downwards, exposing more ice to the comparably warmer ocean water as it melts. To navigate these unique features, the researchers have been using innovative technologies such as Icefin, an underwater robot shaped like a torpedo.



Icefin was dispatched to the grounding line of the Thwaites Glacier. This is the precarious point where the <a href="https://www.earth.com/news/vanishing-glaciers-are-revitalizing-mountain-ecosystems/" target="_blank" rel="noreferrer noopener">glacier</a> parts from the seabed to float.



The first sight of the grounding line through Icefin was a landmark moment, equal to the emotional impact of the moon landing, according to Kiya Riverman, a glaciologist at the <a href="https://www.up.edu" target="_blank" rel="noreferrer noopener">University of Portland</a>.



<h2 class="wp-block-heading" id="h-fast-paced-melting-of-thwaites">Fast-paced melting of Thwaites </h2>



Images relayed back from Icefin revealed that the glacier is melting in unforeseen ways. Warm ocean water is seeping through deep crevices and stair-like formations in the ice, destabilizing the glacier.



But the discoveries didn't end there. The scientists also used satellite and GPS data to study the effects of tides, finding that seawater was able to push over 6 miles beneath Thwaites. This intrusion of seawater froths warm water under the ice, prompting fast-paced melting.



These discoveries led to further investigations into Thwaites' past through the analysis of marine sediment cores. Julia Wellner, a professor at the University of Houston, determined that Thwaites began its rapid retreat back in the 1940s, most likely triggered by a strong El Niño event.



<h2 class="wp-block-heading" id="h-irreversible-retreat-of-thwaites">Irreversible retreat of Thwaites </h2>



Despite <a href="https://www.earth.com/news/petermann-glacier-melting-has-tripled-due-to-warm-ocean-waters/" target="_blank" rel="noreferrer noopener">Thwaites</a>' rapid retreat, there was a glimmer of hope amongst the otherwise grim discoveries. Computer simulations revealed that the chances of ice shelves collapsing, setting off a domino effect of plunging ice cliffs into the ocean, are lower than previously feared.



But the Doomsday Glacier is far from secure. Scientists predict that Thwaites and the Antarctic Ice Sheet behind it could vanish by the 23rd Century.



Regardless of whether humans manage to stop burning fossil fuels soon - which isn't currently in the cards - it may unfortunately be too late to prevent the collapse of the Doomsday Glacier.



<h2 class="wp-block-heading" id="h-unified-effort-against-climate-change">Unified effort against climate change</h2>



The potential fate of the Thwaites Glacier underlines the vital need for a worldwide response to climate change. Collaborative projects like the ITGC are crucial for pooling global expertise and resources. 



To tackle the challenges posed by Thwaites, scientists are sharing data and conducting interdisciplinary research spanning oceanography, geology, and climate science.



This united effort provides a glimmer of hope that through collective innovation, humanity can devise effective strategies to alleviate the impacts of rising seas and climate change.



<h2 class="wp-block-heading" id="h-vulnerable-regions-of-antarctica">Vulnerable regions of Antarctica </h2>



Thwaites Glacier gets a lot of attention because it could impact global sea levels, but we should also look at other vulnerable areas in Antarctica. The way different <a href="https://www.earth.com/news/retreating-glaciers-unleash-a-world-of-ecological-potential/" target="_blank" rel="noreferrer noopener">glaciers</a> interact with the Southern Ocean is a tricky puzzle that researchers are working to figure out.



By understanding these dynamics, scientists aim to better predict scenarios and timelines for global sea level rise. This research also informs climate policies and adaptation strategies for coastal cities worldwide. 



<h2 class="wp-block-heading" id="h-uncertainty-about-the-future">Uncertainty about the future</h2>



As this phase of the ITGC's profound research concludes, the team emphasizes the need for further studies to truly understand this complex glacier. 



“While progress has been made, we still have deep uncertainty about the future,” said Eric Rignot, a glaciologist at the <a href="https://uci.edu" target="_blank" rel="noreferrer noopener">University of California, Irvine</a> and part of <a href="https://thwaitesglacier.org" target="_blank" rel="noreferrer noopener">ITGC</a>. “I remain very worried that this sector of Antarctica is already in a state of collapse.”



Image Credit: NASA/James Yungel



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Doomsday Glacier may collapse sooner than we thought

In the remote, icy stretches of Antarctica, the melting of a massive glacier is picking up speed. This giant, called the Thwaites Glacier, is often referred to as the Doomsday Glacier. Since 2018, experts leading the International Thwaites Glacier Collaboration (ITGC) have been investigating the dynamics of Thwaites. The researchers have been up close and personal with Thwaites, breaking through ice and using underwater robots to exhaustively study this massive glacier and comprehend its possible downfall. Retreat of the Doomsday Glacier The extensive and painstaking research has...

In one of the first studies to ever investigate <a href="https://www.earth.com/news/plastic-pollution-oceans-triple/">plastic pollution</a> in freshwater lakes, experts have found that these habitats are potentially threatened by plastic waste just as much as the ocean. 

Dr. Montserrat Filella is a researcher at the <a href="https://www.unige.ch/en/university/">University of Geneva</a> in Switzerland and the study's lead author.

“Plastic debris in freshwater lakes are likely to pose the same problems to wildlife as marine plastics. In this respect, entanglement and ingestion are of greatest concern,” said Dr. Filella.

“The hazardous chemicals we find associated with these plastics is also worrying. When they are eaten by animals mistaking them for food, the acidic and enzyme-rich conditions in the stomach could accelerate how quickly these toxins are released into the body, affecting the animals concerned.”

When the researchers analyzed plastic collected from the beaches of Lake Geneva, they found an abundance of toxic chemicals present.

These toxic chemicals, including cadmium, mercury and lead, were sometimes found in very high concentrations that exceed the maximum amounts currently permitted by law. This indicates that the plastic litter has persisted in the environment for a long time.

The research team obtained litter from 12 different pebble beaches around Lake Geneva, which is one of the largest freshwater bodies in western Europe.

More than 3,000 pieces of plastic debris were collected, including identifiable objects such as toys or pens, pieces of identifiable objects such as piping or plant pots, and plastic fragments that could not be traced back to their original sources such as foam.

“A lot of the plastic was similar to that found on marine beaches, such as bottle tops, straws and polystyrene,” said Dr. Filella. “In contrast, there was an absence of nurdles - pellets used as a basis for plastic production - and a lower incidence of plastic filamentous fibers from commercial fishing, such as rope, netting and cord.”

The researchers used X-ray fluorescence to look for toxins present on over 600 of the plastic pieces.

“We detected the frequent presence of hazardous elements, such as bromine, cadmium, mercury and lead, in very high concentrations in some cases,” said study co-author Dr. Andrew Turner. 

“The abundance of these toxic elements, which are now restricted or banned, reflects just how long the plastic has been in the lake. For example, mercury is a metal that to our knowledge has not been used in plastics for decades.”

Dr. Turner pointed out that freshwater systems have been largely overlooked when it comes to the impact of plastic pollution.

“The impacts of plastic-bound toxic elements on lake wildlife are currently unknown but should form the basis of future research,” said Dr. Filella.

The study is published in the journal <a href="https://www.frontiersin.org/journals/environmental-science">Frontiers in Environmental Science</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: <a href="https://commons.wikimedia.org/wiki/File:Lake_Geneva_with_Vineyards_in_Lavaux.jpg">Wikimedia Commons</a>

Plastic pollution also contaminating lakes and freshwater bodies

In one of the first studies to ever investigate plastic...

A new GPS-based method that can model tsunamis could help coastal areas in Japan better prepare for potential disaster.

Following the catastrophic 2011 Tōhoku earthquake and <a href="https://www.earth.com/news/study-seawalls-coastal-forests-in-japan-help-reduce-tsunami-damage/">tsunami</a>, the Japanese government asked for hazard assessment research that would identify the worst case scenarios for both earthquakes and tsunamis for the country. 

Researchers Hannah Baranes and Jonathan Woodruff from the <a href="https://www.umass.edu/">University of Massachusetts Amherst</a>, along with colleagues from <a href="https://www.smith.edu/">Smith College</a> and the <a href="http://www.jamstec.go.jp/j/">Japanese Agency for Marine-Earth Science and Technology</a>, conducted a study hoping to model potential tsunamis along the Nankai Trough. 

 “The government guideline has focused attention on the Nankai Trough,” said Baranes. “It's a fault offshore of southern Japan that is predicted to generate a magnitude 8 to 9 earthquake within the next few decades.”

According to the research, a Nankai-induced tsunami could displace four times the number of people impacted by the 2011 tsunami. 

Modeling tsunamis based on potential seismic events would help show the kind of damage and flooding to expect if an earthquake in the region were to occur. 

First, the researchers collected sediment cores in Japan so that they could create a long-term record of tsunami flooding. 

Marine sediments get trapped within the lake bed as tsunamis flood coastlines, and the researchers looked for evidence of marine sediments with the samples they collected. 

“These sand deposits get trapped and preserved at the bottoms of coastal lakes,” said Baranes. “We can visit these sites hundreds or even thousands of years later and find geologic evidence for past major flood events.”

Sediments from Lake Ryuuou, a lake on an island in the Bungo Channel, had a layer of sand that came from seawater that flooded into the lake, making its way over a 13 foot-high barrier. 

The flooding corresponds with a Nankai Trough tsunami that occurred in 1707, but the location of the island within the Bungo Channel makes such high flooding unlikely and presented a major challenge for the modeling efforts. 

The researchers had to find a way to create a model that simulated an event similar to the 1707 event. If a Nankai-induced earthquake had reached there before, the island was at risk in the event of another Nankai Trough earthquake. 

At first, the models and scenarios created tsunamis that were only six-feet high, not nearly enough to breach the 13-foot high barrier. 

The researchers then turned to Jack Loveless, a professor at Smith College who uses GPS measurements of earth surface motion and who helped create earthquake scenarios based on GPS estimates of plate movement and frictional locking along the Nankai Trough. 

The GPS measurements created a similar scenario to the 1707 earthquake. 

“Our model earthquake scenarios showed the Bungo Channel region subsiding seven feet and lowering Lake Ryuuoo's barrier beach from 13 to six feet, such that a tsunami with a feasible height for an inland region easily flooded the lake,” said Baranes. 

The results of the study are promising and potentially could be used to help model future tsunamis in high-risk coastal areas worldwide. 

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

Which parts of Japan are most at risk of a tsunami?

A new GPS-based method that can model tsunamis could help...

A large crack in southwestern Kenya collapsed part of the Nairobi-Narok highway and foreshadows the possibility of Africa splitting in half several million years. 

Movement along the plate boundaries in the earth’s lithosphere can cause rift valleys to appear, just like the one currently forming in <a href="https://www.earth.com/news/sophisticated-tools-ancestors-found/">Africa</a>.

Although the continent is millions of years away from breaking in two, the recent activity has spurred renewed interest in rift valleys and how they form. 

Lucia Perez Diaz, a postdoctoral researcher at the <a href="https://www.royalholloway.ac.uk/earthsciences/research/gss/fdrg.aspx">Fault Dynamics Research Department</a> of the <a href="https://royalholloway.ac.uk/">Royal Holloway University of London</a>, recently wrote a piece in <a href="https://theconversation.com/large-crack-in-east-african-rift-is-evidence-of-continent-splitting-in-two-94056">The Conversation</a> describing the processes behind rift valleys. Diaz also addressed the tear in Africa and the projected timeline as the continent fully splits in two. 

According to Diaz, the lithosphere is the layer of our planet that contains the crust and the upper mantle and is broken up by tectonic plates. These plates move thanks to the viscous nature of the asthenosphere. 

The movement of these plates release large amounts of energy as they slip or move past one another, which is what causes earthquakes.

Sometimes plates can rupture, which is how rifts and new plate boundaries are formed. The new crack in Kenya is part of the East African Rift System. The source of this rift is a large mantle plume that rises up towards the lithosphere and puts stress on the Earth’s crust, stretching it to the breaking point. 

According to Diaz, evidence of a mantle plume called the African Superswell has been confirmed and it is splitting the African plate into two pieces, the Somali and Nubian plates. 

Over a span of tens of millions of years, the lithosphere will break apart in the East African Rift System and a new ocean will start to form. Eventually, the entire rift will flood and Africa will be markedly smaller as the continent is split in two. 

Most of the time, the extensive rifting process goes unnoticed unless accompanied by distinct seismic activity like large earthquakes. 

“Dramatic events, such as sudden motorway-splitting faults or large catastrophic earthquakes may give continental rifting a sense of urgency but, most of the time, it goes about splitting Africa without anybody even noticing,” Diaz told The Conversation.

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>,<a href="https://www.earth.com/"> Earth.com </a>Staff Writer

Is Africa beginning to split into two halves?

A large crack in southwestern Kenya collapsed part of the...

It might be fair to say that the European-based American culture is uncomfortable with desert.  The very word invokes ideas of wastelands inhospitable to life. Images of vultures circling over people panting the word ‘water’ as they trudge over sand dunes come to mind.  Desertification is seen as an unmitigated negative, with no upside. In her book Refuge, Terry Tempest Williams gives perfect voice to how many who do not know the desert seem to feel when voicing the government’s stance:

“A blank spot on the map translates into empty space, space devoid of people, a wasteland perfect for nerve gas, weteye bombs, and toxic waste.  The army believes that the Great Salt Lake Desert is an ideal place to experiment with biological warfare.” 

The problem with this view of the desert as openly hostile is that it’s full of life, including human life.  It’s important to remember that humans took their first steps in rather arid environments in Africa. The roots of Western Civilization also started in dry places: Egypt and the fertile crescent of the Middle East.  The desert has long been inspiration for zealots and iconoclastic individuals. Those who have learned to know the desert have often found a love for the lean beauty, myself included. 

When big conservation concerns come to mind, many think of rainforest or maybe polar ice caps.  Desert rarely comes to the forefront in endangered places or endangered animals. The sad truth is that we could easily lose the landscape of the American desert, a place of stark beauty and uniquely American as New York City.      

According to a recent report from <a href="https://www.drought.gov/drought/">Drought.gov</a>, 26.1% of the U.S. is in drought, or 30.8% of the lower 48 states.  On maps, a stark red patch hovers over the four corners region of the Southwest, expanding across New Mexico into Oklahoma and part of Texas as well as cutting across the whole state of Arizona.  The red patch signifies extreme drought and covering most of the southwest as well as the southeast, and parts of the Midwest are varying hues of yellow meaning everything from ‘abnormally dry’ to  ‘severe drought’. It’s not breaking news that the southwestern U.S. has been very dry as of late. Anyone that watches the news with any regularity has heard of Californians pulling up orchards because of due to recent drought.  Mostly the concern seems to be with humans, but we are the most mobile, most adaptable and most to blame for the decline of the desert regions many of us call home. 

There is a disconnect between how people who live in cities in the desert go about their lives and the stark realities of the dwindling water they depend on.  Already this year, Grand Canyon National Park has been in level 3 water restrictions, just lifted. The water restrictions stopped showering and even dishwashing at Grand Canyon restaurants.  Meanwhile in other parts of Arizona, water waste is rampant. Outside the mall where the local Tucson REI resides, there is a cascade of artificial fountain water. At the city park where I often jog or take my dog to the dog park, there is also a grassy golf course.  People in Phoenix haven’t stopped using their swimming pools, Las Vegas is still littered with fountains and fake pirate battles on extravagant artificial seas. 

The future for the desert is grim as humans pull water from every river, aquifer and oasis for their gluttonous appetite.  It’s not just that we’re using more water, although we are, it’s that a lot of water is from aquifers and can’t replenish itself on a human timetable.  The Ogallala Aquifer underlying the center of the continent from northern Texas to Southern South Dakota is expansive at nearly 175,000 square miles. A <a href="https://www.usgs.gov/">USGS</a> study shows a drop of 15.4 feet in the aquifer systems water level from predevelopment to 2013, and 2.1 feet of the water level drop occurred between 2011 and 2013.  

Adding to the conundrum is <a href="https://www.earth.com/news/humans-driving-climate-change/">climate change</a>.  

In the iconic landscape of Joshua Tree National Park, a haven for climbers and desert rats of all sorts, the namesake Joshua Tree (Yucca brevifolia) is in danger.  Due to climate change the giant, scraggly yucca tree the Mormons named after Joshua isn’t reproducing very quickly.  A study cited by <a href="https://www.nationalgeographic.com/">National Geographic</a> shows that in 30% of the Joshua Trees range in the park there are few or no young trees.  Joshua Trees may be in extreme peril with higher temperatures and increasing droughts. 

Joshua Trees aren’t the only iconic desert plant threatened by climate change either.  It’s hard not to think of saguaros (Carnegiea gigantean), the giant cactus with arms when thinking of the American desert.  According to <a href="http://sweetwatercenter.org/">sweetwatercenter.org</a>, saguaros grow fastest in the wettest part of their range and slowest in the driest part of their range.  Besides growth rates, Buffelgrass (Pennisetum ciliare) an invasive introduced from Africa may outcompete native plants under the influence of climate change.  Saguaros and other Sonoran desert plants have evolved over the ages for a specific climate pattern of monsoons breaking up hot dry weather.  As the weather becomes more erratic, known patterns break down, pushing some species past the breaking point. 

If Saguaros and Joshua trees go, many other plants will go with them.  With no plants and less reliable water, the irony is an ecosystem defined by lack of water will be forever destroyed.  River systems like the Colorado are already over taxed. According to the <a href="https://sonoraninstitute.org/">Sonoran Institute</a>, the Colorado River once delivered 17 billion cubic meters of fresh water to the estuary at the top of the Sea of Cortez in Mexico.  Today there is a trickle of agricultural runoff and effluent from wastewater treatment. The Sonoran Institute is working hard to restore the estuary provided habitat for desert pupfish, Vaquita, Colorado Delta Clam and many others being unique to the region.  As we continue to drain the Colorado River faced with drought and lower water tables, the estuary will suffer more.

What can be done to save the American Desert?  I cannot claim to have the answer. I will say what I know is the first step.  You must know the desert, forgo the museum, pass by the library and hit the hiking trails.  Learn the names of the cactus stuck in your sock. Get sunburned. Blister your hands climbing a sandstone cliff.  Fall in love with the desert. No one fights as hard for something they don’t love. Remember the words of Ed Abbey, the great American desert rat, “Love implies anger.  The man who is angered by nothing cares about nothing.” 

--

By <a href="mailto:zachfitzner@yahoo.com">Zach Fitzner</a>, <a href="http://earth.com">Earth.com</a> Staff Writer

The end of the Great American Desert?

It might be fair to say that the European-based American...

While many people are relieved to see winter change to spring, the warmer weather and budding trees sometimes means a whole season of agony for allergy sufferers. 

You may have even heard the rumor that <a href="https://www.earth.com/news/stress-sick-allergies/">allergies</a> seem to be getting worse in the United States, and there actually might be some truth to this.

It all boils down to a concept called “botanical sexism” which was first termed by horticultural epidemiologist Thomas Leo Ogren. 

Ogren has been studying the allergy-potential of common horticultural plants for 30 years and has even written several books on gardening techniques for mitigating allergies. 

Botanical sexism involves the process by which urban landscapers, in an effort to keep city streets and sidewalks clear of seeds and flowers, plant only male trees. 

The male trees lack the seeds of their female counterparts but have an abundance of pollen, and as the trees get bigger, their pollen counts increase. 

In an article for the <a href="https://blogs.scientificamerican.com/guest-blog/botanical-sexism-cultivates-home-grown-allergies/">Scientific American</a>, Ogren discusses the timeline of male trees dominating city streets. It all started after Dutch Elm Disease wiped out millions of trees across the country in the 1980s. In an effort to replace them, many landscapers opted to plant clonal male trees. 

“The problem is that while these trees and plants are “litter-free,” they all produce abundant allergenic pollen,” Ogren told Scientific American.

What’s worse is that the pollen congregates in the areas where the trees are planted, so people who live in cities with an abundance of male trees risk a high exposure to pollen. 

Ogren suggests that smart landscape management, planting more female trees, and stopping commercial growers from selling male only plants are all ways to help reduce pollen counts. 

“The more female plants in a landscape, the less pollen there will be in the air in the immediate vicinity,” Ogren told Scientific American. “By relying less on males and paying more attention to the allergy-potential of all the plants in our urban landscape, all of us may one day breathe easier.”

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

Botanical sexism with trees making seasonal allergies worse

While many people are relieved to see winter change to...

DCIM100GOPRO

A new study has found that atmospheric carbon dioxide may have twice the impact on coastal estuaries compared to the ocean. According to experts from the <a href="https://www.epa.gov/">Environmental Protection Agency</a>, human-caused <a href="https://www.earth.com/news/seagrass-co2-emissions/">carbon dioxide</a> weakens the ability of ecosystems to absorb its naturally-fluctuating levels.

The investigation was focused on an underwater seagrass habitat in Washington state's Puget Sound that is between one and four meters deep. Lead author Stephen Pacella collected data at the site for over two and a half months.

The research team found that, on a daily basis, marine organisms were exposed to significant variability in harmful levels of carbon dioxide. For example, the water had higher carbon dioxide, lower pH levels, and a lower saturation state at night time.

The study revealed that the threatening conditions which occured in the estuary overnight are changing twice as fast as the daily average. This will have a negative influence on shell-building animals including oysters, clams, and mussels.

Study co-author George Waldbusser is a Marine ecologist at <a href="https://oregonstate.edu/">Oregon State University</a>.

“In these environments that are dominated by marine plants, photosynthesis and respiration cause large differences in CO2 concentrations and the addition of anthropogenic carbon make these day-to-night differences even larger than they would be without that extra carbon,” said Waldbusser.

“The continued addition of CO2 to these waters results in the worst conditions changing twice as fast due to the loss of the system's ability to buffer itself.”

Pacella’s data was used to develop a model that can be used to estimate the daily carbonate chemistry during the summer dry season all the way back to the year 1765. The model can also be used to predict the conditions through the end of this century.

“Organisms, including us, experience the weather - and climate is what causes changes to the weather,” said Waldbusser. “However, we can't really ‘feel’ the gradual change in global temperature. We do, though, experience the extreme weather events or flooding, which are predicted to get worse due to gradual increases in sea level.”

“In this case, the carbonate chemistry history is changing more rapidly than we anticipated. As with sea level rise, the graduate increase becomes more important during events that amplify those otherwise naturally occurring cycles.”

The researchers say they are still investigating how these events affect the long-term health of species that are sensitive to ocean acidification.

“If, as we tend to believe, extreme events matter to marine organisms, the research suggests that more work is needed to define water quality criteria that incorporate daily changes in the highs and lows of CO2 rather than just utilizing average daily or annual conditions,” said Waldbusser.

The study is published in the journal <a href="http://www.pnas.org/">Proceedings of the National Academy of Sciences</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: <a href="https://oregonstate.edu/">Oregon State University</a>

Human-caused CO2 emissions are harming estuaries

A new study has found that atmospheric carbon dioxide may...

Nearly 500 species in the United States may face the threat of extinction, according to a concerning new wildlife report. 

The <a href="https://www.nwf.org/-/media/Documents/PDFs/NWF-Reports/2018/Reversing-Americas-Wildlife-Crisis_2018.ashx?la=en&amp;hash=B41BE77BAFA4252AA4C197233AB08AEBCC4613CC">report</a> was just released by the <a href="https://www.nwf.org/">National Wildlife Federation</a> and included data from the <a href="https://fisheries.org/">American Fisheries Society </a>and the <a href="http://wildlife.org/">Wildlife Society</a>. 

Habitat degradation, disease, pollution, <a href="https://www.earth.com/news/political-split-climate-change/">climate change</a>, and invasive species have all been listed as major threats to American wildlife, prompting worrying species loss in the country. 

More than 150 species have already gone extinct in the United States, including the Carolina parakeet and the passenger pigeon.

At the current rate that populations are decreasing, almost one-third of all wildlife species in the country may not be far behind, according to the recent findings. 

Some notable species at risk include freshwater fish, monarch butterflies, and bats. 

Monarch butterfly populations have dropped by 90 percent in the last two decades, and bat species in North America have faced a 30 percent decline. 

Freshwater fish and bees were reportedly the hardest hit over the years, and 40 percent of freshwater fish in North America are rare or imperiled.

“America’s wildlife are in crisis and now is the time for unprecedented on-the-ground collaboration,” said Collin O’Mara, President and CEO of the National Wildlife Federation. “Fish, birds, mammals, reptiles and invertebrates are all losing ground. We owe it to our children and grandchildren to prevent these species from vanishing from the earth.”

The report also outlines some successful conservation efforts, but reveals how endangered North American wildlife and biodiversity is. 

“Wildlife in America needs help,” John McDonald, the President of the Wildlife Society. “Species are increasingly at risk in all regions of the country and across all categories of wildlife. This decline is not inevitable. Wildlife professionals in every state have action plans ready to go to conserve all wildlife for future generations, but we need the funding to turn this situation around.”

--

By <a href="mailto:kayvandette@gmail.com">Kay Vandette</a>, <a href="https://www.earth.com/">Earth.com</a> Staff Writer

Nearly one-third of North American species could face extinction

Nearly 500 species in the United States may face the...

Early Earth has always had a volatile reputation. Previous studies have estimated various scenarios ranging from an ice-covered, snowball Earth to a sweltering environment complete with acidic oceans. 

It turns out that the first few eons of our planet may have been much more habitable and mild than previously theorized, according to a new study. The research, published in journal Proceedings of the National Academy of Sciences, could indicate that other planets could also sustain life.

Researchers from the <a href="https://www.washington.edu/">University of Washington </a>used seafloor weathering data to run simulations of what conditions were like during the Archean Era around four billion years ago. 

“Ideas about the early Earth's environment are all over the place, from a very hot world, to one locked in a permanent ice age, from a world with acidic oceans to one with seawater so alkaline it would sting your eyes,” said David Catling, a UW professor of Earth and space sciences. “These simulations show that our early world had about the same average temperature as today, and a seawater pH within roughly one unit of neutral.” 

For the study, the researchers created a computer simulation of the Earth’s temperatures over the past four billion years, and seafloor weathering data played a key role in the research. 

Seafloor weathering occurs when the seabed erodes due to seawater circulating through cracks in the Earth’s crust. Carbon dioxide in the water is then trapped in the Earth’s crust which helps regulate the ocean’s acidity and temperatures. 

“Seafloor weathering was more important for regulating temperature of the early Earth because there was less continental landmass at that time, the Earth's interior was even hotter, and the seafloor crust was spreading faster, so that was providing more crust to be weathered,” said Joshua Krissansen-Totton, first author of the study.

The researchers ran several simulations with varying scenarios accounting for different continent sizes, temperature sensitivity, and chemical weathering in order to get the most accurate picture of early Earth. 

The results showed likely temperatures during the Archean ranging from 0 to 50 degrees Celsius (32 to 122 Fahrenheit). 

“We got this initial answer that early Earth had moderate temperatures and slightly acidic ocean pH,” said Krissansen-Totton. “I tried really hard to break that, looking for assumptions that could possibly change that answer. But I found that this is a really robust result. It's hard to imagine a realistic scenario where temperatures or pH were more extreme.”

The exciting results provide a more accurate understanding of our planet’s first few billion years. 

The study also points to the possibility that there are more planets with mild temperatures within the habitable zone and these could easily support <a href="https://www.earth.com/news/incomplete-fossils-distorted-view/">life</a>. 

"There's nothing particularly remarkable about these processes," said Krissansen-Totton. "They can occur on any rocky planet with oceans. So other planets that are in the habitable zone are likely to have their climates stabilized to moderate values by these weathering feedbacks. And that's a good thing for the search for life, because you need moderate temperatures for billions of years to have a stable environment for life to evolve."

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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

Early Earth’s mild climate may signal life on other planets

Early Earth has always had a volatile reputation. Previous studies...

One of the most crucial parts of understanding the impact of climate change is assessing how changes in radiation and precipitation will affect Earth’s water cycle.

It had been previously thought that <a href="https://www.earth.com/news/sahara-desert-getting-bigger/">climate change</a> and rising emissions will make the planet a drier, hotter environment.

However, researchers from the <a href="http://engineering.columbia.edu/">Columbia University School of Engineering</a> have found that vegetation actually has the biggest impact on the water cycle, and that plants will regulate water resources for the future.

The results, published in the journal Proceedings of the National Academy of Sciences, show how climate research coupled with plant physiology is critical to predicting the future of our planet’s water cycle.

“Our finding that vegetation plays a key role future in terrestrial hydrologic response and water stress is of utmost importance to properly predict future dryness and water resources,” said Pierre Gentine, the leader of the research. “This could be a real game-changer for understanding changes in continental water stress going into the future.”

In a scientific first, Gentine’s research separated the vegetation response to rising carbon emissions from the total global warming complex response, which includes the impact climate change has on the water cycle, soil moisture, and runoff. 

By isolating the vegetation response, that the researchers discovered plants were the dominant force controlling the water cycle and would play the biggest role in explaining future water stress. 

For the study, the researchers took Earth system models of vegetation physiology and the atmosphere and their responses to carbon dioxide.

These decoupled models were then combined with a multi-model statistical analysis from the fifth phase of the Coupled Model Intercomparison Project (CMIP5). CMIP5 is the most current set of coordinated climate model experiments created for the <a href="http://www.ipcc.ch/">International Panel on Climate Change</a>

There were three different scenarios or runs tested. First was a control run that examined CO2 response at the leaf level and in the atmosphere. The second scenario specifically looked at vegetation and its response to a rise in carbon emissions. The third run focused instead on the atmospheric response to a rise in CO2. 

The results showed that changes in plant physiology in response to CO2 emissions had the greatest influence on evapotranspiration and the hydrologic cycle. 

As the effects of climate change worsen, this research will help provide valuable insight into predicting the impact that rising emissions will have on Earth’s most valuable resources.

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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

Image Credit: Kevin Krajick/Earth Institute

Plants will have the biggest impact on the world’s water cycle

One of the most crucial parts of understanding the impact...

<a href="https://www.earth.com/news/limit-global-warming/">Global warming</a> is threatening the Arctic region with ice-free summers, and a new study has revealed that a global mean temperature rise of merely one degree Fahrenheit will make all of the difference for summer sea ice in the Arctic.

The researchers found that limiting global warming to 1.5 degrees Celsius would lead to a 30 percent chance of an ice-free Arctic summer by the year 2100. However, warming by 2 degrees Celsius would make at least one ice-free Arctic summer inevitable.

Study author Alexandra Jahn is an assistant professor in the Department of Atmospheric and Oceanic Sciences at the <a href="https://www.colorado.edu/">University of Colorado Boulder</a>.

“I didn't expect to find that half a degree Celsius would make a big difference, but it really does,” said Jahn “At 1.5 degrees Celsius, half of the time we stay within our current summer sea ice regime whereas if we reach 2 degrees of warming, the summer sea ice area will always be below what we have experienced in recent decades.”

The team used simulations from the Community Earth System Model (CESM) at the National Center for Atmospheric Research (NCAR) to evaluate warming scenarios ranging from 1.5 degrees Celsius to 4 degrees Celsius. The analysis demonstrated how drastically different the outcome of the each scenario would be for Arctic summer sea ice.

“This dataset allows us to predict how soon we're likely to see ice free conditions as well as how often,” said Jahn. 

“Under the 4-degree Celsius scenario, we would have a high probability of a three-month ice free period in the summer months by 2050. By the end of century, that could jump to five months a year without ice. And even for half that warming, ice-free conditions of up to 2 month a year are possible by the late 21st century.”


Jahn pointed out that, if warming is limited to 1.5 degrees Celsius, the probability of ice-free summers would drop by 70 percent and could likely be avoided altogether or at least delayed. 

The experts hope that the findings of this study may motivate countries to work harder at achieving the warming target that was set forth at the Paris Climate Agreement of 1.5 degrees Celsius.

“The good news is that sea ice has quick response times and could theoretically recover if we brought down global temperatures at any point in the future,” said Jahn. “In the meantime, though, other ecosystems could see permanent negative impacts from the ice loss, and those can't necessarily bounce back.”

The study is published in the journal <a href="https://www.nature.com/nclimate/">Nature Climate Change</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

Arctic could experience ice-free summer by 2100

Global warming is threatening the Arctic region with ice-free summers,...

A new study has revealed that warm ocean water is building up beneath the floating edge of Antarctica's ice sheet. As a result, ice is rapidly melting from underneath and shifting the grounding line, which is the boundary between floating ice and anchor ice.

Researchers at the <a href="https://www.leeds.ac.uk/">University of Leeds</a> have developed the first complete map that shows how the grounding line of Antarctica's great ice sheet is retreating. Between 2010 and 2016, the Southern Ocean melted 1,463 square kilometers, or 361,514 acres, of ice across <a href="https://www.earth.com/news/supercolony-adelie-penguins-antarctica/">Antarctica</a>.

According to the study, eight out of the 65 largest glaciers in Antarctica are losing ice at a rate of 25 meters per year, while the grounding lines at these sites are retreating at five times that rate.

“Our study provides clear evidence that retreat is happening across the ice sheet due to ocean melting at its base, and not just at the few spots that have been mapped before now,” said study lead author Dr. Hannes Konrad. 

“This retreat has had a huge impact on inland glaciers, because releasing them from the sea bed removes friction, causing them to speed up and contribute to global sea level rise.”

[caption id="attachment_1183113" align="aligncenter" width="946"]<a href="https://www.earth.com/wp-content/uploads/2018/04/ice-sheet.png"><img class="wp-image-1183113 size-full" src="https://www.earth.com/wp-content/uploads/2018/04/ice-sheet.png" alt="" width="946" height="811" /></a> Hannes Konrad et al, University of Leeds[/caption]

The experts were surprised to find that retreating ice in one glacier did not predict the same behavior in neighboring glaciers. The researchers discovered, for example, that the erosion of the grounding line at Thwaites Glacier has sped up, yet the erosion of the grounding line at nearby Pine Island Glacier has come to a halt.

“These differences emphasize the complex nature of ice sheet instability across the continent, and being able to detect them helps us to pinpoint areas that deserve further investigation,” said Dr. Konrad.


The study is published in the journal <a href="https://www.nature.com/ngeo/">Nature Geoscience</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

The grounding line of Antarctica's great ice sheet is shifting

A new study has revealed that warm ocean water is...

<a href="https://www.earth.com/news/humans-driving-climate-change/">Climate change</a> is the instigator behind many international issues currently being discussed, and will only have a hand in even more global problems in the future. One of these problems – according to new research led by the <a href="https://www.exeter.ac.uk/">University of Exeter</a> – could be increased risk of food shortages in numerous countries. 

For the study – published in the journal <a href="http://rsta.royalsocietypublishing.org/">Philosophical Transactions of the Royal Society A</a> – the researchers assessed how climate change may affect the vulnerability of different nations in regards to food insecurity, which occurs when the public is unable to access a sufficient quantity of nutritious, affordable food.

The researchers looked at 122 developing and least-developed countries, mainly in Asia, Africa, and South America. They analyzed the difference between global warming of 1.5°C and 2°C – compared to pre-industrial levels – and found that the effects would be worst for most countries at 2°C. However, food vulnerability would increase in both scenarios. 

“Climate change is expected to lead to more extremes of both heavy rainfall and drought, with different effects in different parts of the world,” says Richard Betts, Chair in Climate Impacts at the University of Exeter. “Such weather extremes can increase vulnerability to food insecurity. Some change is already unavoidable, but if global warming is limited to 1.5°C, this vulnerability is projected to remain smaller than at 2°C in approximately 76% of developing countries.”

On average, warming attributed to climate change is expected to result in wetter conditions, which means an increased risk of flooding. But in some areas, agriculture could also be affected by more frequent and sustained droughts. Wet conditions are expected to have the greatest impact in South and East Asia, with the most extreme projections predicting that the flow of the River Ganges could more than double at a 2°C temperature increase. For droughts, the areas expected to be significantly affected are southern Africa and South America – where the flow of the Amazon is projected to decline by as much as 25 percent.

Clearly, the path of climate change seems to be leading to more extreme weather, which could spell disaster for areas already vulnerable to droughts or flooding. 

--

By <a href="mailto:certz@earth.com">Connor Ertz</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Food insecurity risks increase with climate change

Climate change is the instigator behind many international issues currently...

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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 



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

[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



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.

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



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.

Tiger sharks are shifting poleward as temperatures rise

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

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



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



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



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



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



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



Video Credit: ESA&nbsp;



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



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

Melt ponds on the Greenland Ice Sheet

[sendtonews key="qARzJPSabQ-2270617-12187" type="single"] Today’s Video of the Day from the...

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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



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.

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

[sendtonews key="gRpsplpwpe-2251464-12187" type="single"] Today’s Video of the Day from the...

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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

[sendtonews key="sFFhiK9OOn-1720418-12187" type="single"] Today's Video of the Day from the...

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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

[sendtonews key="yPSXGZek1I-2312529-12187" type="single"] Today’s Video of the Day from the...

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

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



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



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



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



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

Monitoring deforestation in the Amazon through sounds

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