Published: Sat, June 16, 2018
Sci-tech | By Carrie Guzman

West Antarctic Ice Sheet Used To Be Smaller, But Recovered

West Antarctic Ice Sheet Used To Be Smaller, But Recovered

However, "a single East Antarctic glacier, Totten, has the potential to unleash as much total sea-level rise as the entire West Antarctic ice sheet, or more", the Post explains. "This has to be a concern for the governments we trust to protect our coastal cities and communities".

Shakun and some of the co-authors of the latest report used a different approach two years ago to offer one of the most comprehensive climatological accounts ever compiled of the Greenland Ice Sheet, dating back 7.5 million years. And they found that it's melting faster than they thought. That is at the upper end of what the Intergovernmental Panel on Climate Change has estimated Antarctica alone could contribute to sea-level rise this century. As part of IMBIE, Professor Shepherd coordinated with 83 other scientists, from 44 worldwide organizations, to combine the data from two dozen different satellite surveys for this comprehensive look at the changes in Antarctica's ice mass balance.

Antarctica has lost trillion tonnes of ice to global warming over the past quarter of a century, according to a new study, and that loss has been accelerating in recent years, to triple the rate that was seen prior to 2012.

Their account elucidates how ice shelf thinning and subsidizing have catapulted in the expansion in continent's benefaction to rise in sea level.

An accelerating thaw of Antarctica has pushed up world sea levels by nearly a centimeter since the early 1990s in a risk for coasts from Pacific islands to Florida, an worldwide team of scientists said on Thursday.

In the last 25 years, the world's largest ice sheet has lost nearly 3 trillion tonnes (3.3 trillion tons) of ice, contributing to an almost 8-millimeter rise in global sea levels.

"Gravity measurements from the GRACE [Gravity Recovery & Climate Experiment] mission help us track the loss of ice mass in the polar regions and impacts on sea level at points around the planet", said co-author Isabella Velicogna, UCI professor of Earth system science. The rate at which ice losses from Antarctica will increase in response to a warming world remains uncertain. West Antarctica and the Antarctic Peninsula, which reaches toward South America, have been known for some time to be losing ice.

Atlanteans Ride Sharks In Majestic New Aquaman Concept Art
There's a behind-the-scenes photo with director James Wan that features our first look at Willem Dafoe as Vulko (from behind). It stars Jason Momoa as the character we've already seen in Batman V Superman: Dawn Of Justice (briefly) and Justice League .

"If the political landscape of a future Antarctica is more concerned with rivalry, and how each country can get the most out of the continent and its oceans, then all protections could be overturned".

While some people blame climate change for the rapid melting ice caps, others blame underground heat sources such as volcanoes.

"Satellites have given us an awesome, continent-wide picture of how Antarctica is changing", Pippa Whitehouse, of Durham University, said. "That's important information to have as we try to figure out how the ice sheet will behave in the future".

This chart show Antarctic ice sheet's contribution to sea level rise over time. This ice loss rate has also increased from 7 to 33 billion as a result of ice sheet collapse. The results were published in the journal Nature on Wednesday.

These cores contain geological records, but also chemical signatures - in particular, the rare isotopes beryllium-10 and aluminum-26, which were extracted at the NSF-funded Community Cosmogenic Facility at the University of Vermont and measured using particle accelerators at Purdue University and Lawrence Livermore National Laboratory.

Whether it is a matter of climate change, or magma chambers beneath the Antarctic beneath the surface, scientists are concerned at the alarming rate in which Antarctica is losing ice. The study showed that if this increase in the ice loss grows continually, the rising level of waters in the ocean would destroy the low-lying regions giving them less or no time for taking up safety measures.

"The detailed record shows an acceleration, starting around 2002, " said Beata Csatho, one of the study authors and a glaciologist at the State University of NY at Buffalo, in an e-mail.

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