A crucial crack in an Antarctic ice sheet grew 11 miles in only 6 days. Some highlights: “I was elected to represent the citizens of Pittsburgh, not Paris.”
Pittsburgh’s votes went mostly to Hillary Clinton. She won 55.9 percent of votes in Allegheny County. Note that the Paris Agreement encompasses people from nearly 200 countries, not just the city where it was drafted. “The bottom line is the Paris accord is very unfair at the highest level to the United States.” Other countries think U.S. involvement is extremely fair. “This agreement is less about the climate and more about other countries gaining an economic advantage over the United States.” Actually, the economic advantages of combating climate change are well documented. And, just for fun, a comment from Scott Pruitt: Antarctica’s collapsing ice shelf just sprouted a new crack.
Antarctica’s fourth biggest ice shelf is on the verge of collapse. A rift that has been wending its way across Antarctica’s massive Larsen C ice shelf just made another leap forward, growing by more than 10 miles, scientists monitoring it reported Thursday.
Now, a chunk of ice bigger than New York’s Long Island is hanging on by a relative thread. When it breaks off — possibly very soon — it could put the ice shelf in a more precarious position that could eventually lead it to disintegrate. That could contribute further to the global sea-level rise that is threatening the many populous cities that lie within a few miles of the world’s coasts. “This event will fundamentally change the landscape of the Antarctic Peninsula,” the scientists at Project MIDAS, an Antarctic research effort that has been watching the rift closely, wrote in update. Des lacs supraglaciaires pourraient accélérer la fonte des glaces en Antarctique. Des scientifiques ont révélé une augmentation du nombre de lacs supraglaciaires en Antarctique de l'Est.
En cause : le réchauffement climatique. Une étude satellite montre la formation de lacs supraglaciaires au-dessus du littoral du glacier Langhovde à Dronning Maud Land en Antarctique de l'Est. Près de 8 000 d'entre eux ont déjà été observés entre 2000 et 2013 et ils pourraient accélérer le processus de fonte des glaces. Dirigée par Emily Langley de l'Université de Durham au Royaume-Uni avec Swtewart Jamieson, Chris Stoker et Amber Leeson de l'Université de Lancaster, l'étude a été récemment publiée dans Geophysical Research Letters. Antarctica is melting and shows no sign of slowing down.
Over the past few years, the evidence has piled up that glaciers in parts of Antarctica have been melting and retreating at an increasingly worrying — and potentially unstoppable — pace.
Now, new research shows that glaciers in a region of West Antarctica that has received relatively little attention to date have lost a considerable amount of ice. And that ice melt and retreat has been going on for decades, longer than previously thought. The findings, detailed in the journal Geophysical Research Letters, have implications for understanding the potential sea-level rise that the vast icy expanse of Antarctica could unleash as the Earth’s temperature continues to rise.
Say goodbye to major cities if these scientists are right about Antarctica’s collapsing ice. This story was originally published by the Guardian and is reproduced here as part of the Climate Desk collaboration.
Sea levels could rise far more rapidly than expected in coming decades, according to new research that reveals Antarctica’s vast ice cap is less stable than previously thought. The U.N.’s climate science body had predicted up to a meter of sea-level rise this century — but it did not anticipate any significant contribution from Antarctica, where increasing snowfall was expected to keep the ice sheet in balance.
Advertisement – Article continues below According a study, published in the journal Nature, collapsing Antarctic ice sheets are expected to double sea-level rise to two meters by 2100, if carbon emissions are not cut. Antarctic Ice Shelves Face Major Threat If CO2 Emissions Keep Rising. Climate change is messing with gravity again. The Southern Antarctic Peninsula has dropped the ice equivalent of 350,000 Empire State buildings into the ocean since 2009, according to new research in the journal Science.
This level of ice loss is so great that it has actually caused a small shift in gravity, Science Daily reports. Wait – don’t panic! The change in gravity doesn’t mean you’ll have to don a super-cool space suit any time soon. This type of gravity-shifting ice melt was previously documented in Western Antarctica. Here’s how Eric Holthaus explained it at the time: Though we all learned in high school physics that gravity is a constant, it actually varies slightly depending on where you are on the Earth’s surface and the density of the rock (or, in this case, ice) beneath your feet. So while you’re not at risk of suddenly floating away the next time you walk the dog, you might want to worry over the massive amounts of ice loss. Well, cool. A second giant blob of Antarctic ice is getting ready to drown us. Remember when we found out last year that the West Antarctic ice sheet had started to collapse, that the collapse more or less can’t be stopped, and that it will eventually result in 10 to 15 feet of sea-level rise?
Now we have some more bad news of that caliber. An enormous glacier, one on the other side of the continent from the ailing ice sheet, is doing pretty much the same thing, researchers have discovered. Chris Mooney reports for The Washington Post: The findings about East Antarctica emerge from a new paper just out in Nature Geoscience by an international team of scientists representing the United States, Britain, France, and Australia. They flew a number of research flights over the Totten Glacier of East Antarctica — the fastest-thinning sector of the world’s largest ice sheet — and took a variety of measurements to try to figure out the reasons behind its retreat. Yep, Antarctica is melting away faster than ever. A new report from NASA and UC-Irvine confirms — again — that Antarctica is melting away.
The scientists used observations from four different techniques to measure the amount and change in rate of ice loss from a region in West Antarctica. This area was already known to be melting at an astonishing rate; a recent study using Cryosat 2 showed that in the period from 2010 to 2013, the region was losing ice to the tune of 134 billion metric tons of ice per year. The new study looked at four observation sets covering the years 1992–2013. They found that on average over that time, ice loss from West Antarctica was about 83 billion metric tons per year … but the average increase in that loss was 6.1 billion tons every year.
By the end of the time range, the numbers between the new study and the one from CryoSat2 are consistent. This is staggering. En Antarctique, le réchauffement provoque une extension de la banquise. Malgré le réchauffement, la banquise de l'Antarctique s'étend. Scientists Warn of Rising Oceans as Antarctic Ice Melts. La fonte de glaciers de l'Ouest de l'Antarctique « a atteint un point de non-retour » La fonte des grands glaciers de l'Ouest de l'Antarctique, qui contiennent assez d'eau pour faire monter les océans d'au moins un mètre, s'accélère sous l'effet du réchauffement climatique et paraît irréversible, selon les conclusions de deux études séparées publiées lundi 12 mai.
La fonte des six plus grands glaciers de cette région, Pine Island, Thwaites, Haynes, Smith, Pope et Kohler, contribue déjà de façon importante à la montée des océans, lâchant presque autant de glace annuellement dans l'océan que toute la banquise du Groenland. Ils contiennent suffisamment d'eau pour faire grimper le niveau des océans de 1,2 mètre et fondent plus vite que ne le prévoyaient la plupart des scientifiques.
Lire : En Antarctique, le glacier du Pin recule inexorablement Regarder la carte interactive sur les impacts du réchauffement climatique Lire : Réchauffement : les 10 points marquants du rapport du GIEC. Antarctica’s permafrost is melting. Things are getting ugly on Earth’s underside.
Antarctic permafrost, which had been weathering global warming far better than areas around the North Pole, is starting to give way. Scientists have recorded some of it melting at rates that are nearly comparable to those in the Arctic.