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Temperatures Possible This Century Could Melt Parts of East Antarctic Ice Sheet, Raise Sea Levels 10+ Feet
A section of the East Antarctic Ice Sheet that contains three to four meters (approximately 10 to 13 feet) of potential sea level rise could melt if temperatures rise to just two degrees above pre-industrial levels, a study published in Nature Wednesday found.
Researchers at Imperial College London, the University of Queensland, and other institutions in New Zealand, Japan and Spain looked at marine sediments to assess the behavior of the Wilkes Subglacial Basin during warmer periods of the Pleistocene and found evidence of melting when temperatures in Antarctica were at least two degrees Celsius above pre-industrial levels for periods of 2,500 years or more.
"With current global temperatures already one degree higher than during pre-industrial times, future ice loss seems inevitable if we fail to reduce carbon emissions," Imperial College researcher Dr. David Wilson said in a University of Queensland press release published by ScienceDaily.
The East Antarctic Ice Sheet has been considered less susceptible to melting than the West Antarctic Ice Sheet because its basin is largely above sea level, but the Wilkes Subglacial Basin is below sea level and therefore more vulnerable, University of Queensland researcher Dr. Kevin Welsh said in press release.
"The evidence we have suggests that with the predicted two degrees Celsius warming in Antarctica—if sustained over a couple of millennia—the sheet would start melting in these locations," Welsh said.
Wilson told The Washington Post that the earth could see temperatures this century that would be warm enough to start the melting process eventually, but the study did not indicate how fast or slow that process would be.
"What we definitely can say is that during the [geological] stages where temperatures were warm for a couple of degrees for a couple of millennia, this is where we see a distinct signature in our records," Wilson told The Washington Post. "We can't necessarily say things didn't happen quick, but we can't resolve that in our data."
During one of the periods studied, around 125,000 years ago, sea levels were 20 to 30 feet higher than they are now, The Washington Post reported.
University of California at Irvine glaciologist Isabella Velicogna, who was not involved in the study, told The Washington Post that it "contributes to the mounting pile of evidence that East Antarctica is not as stable as we thought."
The Paris agreement seeks to limit warming to "well below" two degrees above pre-industrial levels, but current efforts are not sufficient to meet this goal, according to an International Energy Agency report released in March.
Another study released this week offers a back-up plan: underwater walls of rock and sand to stop glaciers from sliding and collapsing and to protect them from the warmer ocean water that accelerates melting.
The study, published in the Cryosphere Thursday, used modeling to assess the impact of various geoengineering projects on halting the collapse of West Antarctica's Thwaites Glacier, projected to be the greatest individual source of potential sea level rise.
"We are imagining very simple structures, simply piles of gravel or sand on the ocean floor," study author and Princeton University Department of Geosciences researcher Michael Wolovick told The Guardian.
Wolovick said the designs were "within the order of magnitude of plausible human achievements."
They calculated that the smallest design, constructing a series of columns or mounds using about the same amount of material required to build Dubai's Palm Islands, would have a 30 percent chance of preventing the West Antarctic Ice Sheet's collapse.
Building a full wall, a more ambitious endeavor, would have a 70 percent chance of blocking 50 percent of warmer water from reaching the ice.
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By Johnny Wood
The Ganges is a lifeline for the people of India, spiritually and economically. On its journey from the Himalayas to the Bay of Bengal, it supports fishermen, farmers and an abundance of wildlife.
The river and its tributaries touch the lives of roughly 500 million people. But having flowed for millennia, today it is reaching its capacity for human and industrial waste, while simultaneously being drained for agriculture and municipal use.
Here are some of the challenges the river faces.
By Jake Johnson
As a growing number of states move to pass laws that would criminalize pipeline protests and hit demonstrators with years in prison, an audio recording obtained by The Intercept showed a representative of a powerful oil and gas lobbying group bragging about the industry's success in crafting anti-protest legislation behind closed doors.
Speaking during a conference in Washington, DC in June, Derrick Morgan, senior vice president for federal and regulatory affairs at the American Fuel & Petrochemical Manufacturers (AFPM), touted "model legislation" that states across the nation have passed in recent months.
AFPM represents a number of major fossil fuel giants, including Chevron, Koch Industries and ExxonMobil.
"We've seen a lot of success at the state level, particularly starting with Oklahoma in 2017," said Morgan, citing Dakota Access Pipeline protests as the motivation behind the aggressive lobbying effort. "We're up to nine states that have passed laws that are substantially close to the model policy that you have in your packet."
Big Oil is now using its political power to try and criminalize protests of oil & gas infrastructure.— Friends of the Earth (@foe_us) August 19, 2019
"This legislation has potential to punish public participation and mischaracterize advocacy protected by the First Amendment."https://t.co/bmiHjONEhy
The audio recording comes just months after Texas Gov. Greg Abbott signed into law legislation that would punish anti-pipeline demonstrators with up to 10 years in prison, a move environmentalists condemned as a flagrant attack on free expression.
"Big Oil is hijacking our legislative system," Dallas Goldtooth of the Indigenous Environmental Network said after the Texas Senate passed the bill in May.
As The Intercept's Lee Fang reported Monday, the model legislation Morgan cited in his remarks "has been introduced in various forms in 22 states and passed in ... Texas, Louisiana, Oklahoma, Tennessee, Missouri, Indiana, Iowa, South Dakota, and North Dakota."
"The AFPM lobbyist also boasted that the template legislation has enjoyed bipartisan support," according to Fang. "In Louisiana, Democratic Gov. John Bel Edwards signed the version of the bill there, which is being challenged by the Center for Constitutional Rights. Even in Illinois, Morgan noted, 'We almost got that across the finish line in a very Democratic-dominated legislature.' The bill did not pass as it got pushed aside over time constraints at the end of the legislative session."
Many of the state bills restricting the right to protest have been "drafted by companies and passed through groups like ALEC, the secretive group of corporate lobbyists trying to rewrite state laws to benefit corporations over people." @greenpeaceusa https://t.co/ZxpTjWdrwT— Stand Up To ALEC (@StandUpToALEC) May 6, 2019
Reposted with permission from our media associate Common Dreams.
Hawaii's Kilauea volcano could be gearing up for an eruption after a pond of water was discovered inside its summit crater for the first time in recorded history, according to the AP.
The last four members of an embattled wolf pack were killed in Washington State Friday, hours before the court order that could have saved them.
By Randi Spivak
Slashing two national monuments in Utah may have received the most attention, but Trump's Interior Department and U.S. Forest Service have been quietly, systematically ceding control of America's public lands to fossil fuel, mining, timber and livestock interests since the day he took office.
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By Sue Branford and Thais Borges
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