Antarctic Ice Sheet is Melting Three Times as Fast as Before
17 June, 2018, 05:55 | Author: Darnell Taylor
In a study released Wednesday, June 13, 2018, an global team of ice experts said the melting of Antarctica is accelerating at an alarming rate, with about 3 trillion tons of ice disappearing since 1992.
The Antarctic Ice Sheet covers an area of about 14 million square kilometres; by comparison, the area of Australia is about 7.7 million square kilometres, and that of the U.S. is about 9.8 million square kilometres.
Photo taken on December 9, 2017 shows a penguin at Inexpressible Island in Terra Nova Bay of the Ross Sea in Antarctica. It alone is responsible for between 5-10% of global sea-level rise.
As warmer salt water erodes channels into the ice that attaches glaciers to stable land, it also generates massive vertical fractures splitting glaciers from above and below. Since 1992, it lost 3 trillion tons of ice, losing some of the West Antarctic Ice Sheet and Antarctic Peninsula.
Pine Island is now losing about 45 billion tons per year, and Thwaites is losing 50 billion.
BP's latest annual statistical review of world energy, published yesterday, attracts coverage across a number of newspapers.
These glaciers have the potential to raise sea levels by more than a meter (more than three feet) and are now widely considered to be unstable.
Overall, world sea levels have risen about 20 cm in the past century.
As the ice sheet loses ice, its gravitational pull is reduced, so the local sea level near Antarctica is diminished.
"The Antarctic Ice Sheet is an important indicator of climate change and driver of sea-level rise", the IMBIE team wrote in their Nature paper. "They allow us to test whether our models can reproduce present-day change and give us more confidence in our projections of future ice loss".
"Considering sea level rise, for example, the future rise could be a little smaller or a little larger, or a lot larger - there is a "long tail" on the "bad" side".
The researchers conclude, "Despite the challenges, actions can be taken now that will slow the rate of environmental change, increase the resilience of Antarctica, and reduce the risk of out-of-control consequences".
"Although breakup of the ice shelves does not contribute directly to sea-level rise - since ice shelves, like sea ice, are already floating - we now know that these breakups have implications for the inland ice", said Helen Fricker, a co-author of the review.
The changes will not be steady, in any case, said Knut Christianson, an Antarctic researcher at the University of Washington in Seattle, by email. "They show no indication of being exposed to cosmic rays", said Marc Caffee, a co-author of the paper and professor of physics at Purdue University in the United States. So we should expect "periods of stability interspersed with rapid retreat", he said. Talking about the rise in sea levels, Dr. Whitehouse adds, "And that is not only going to impact people who live close to the coast but actually when we have storms - the repeat time of major storms and flooding events is going to be exacerbated".
"The greatest threat from West Antarctic collapse would be northern hemisphere sites in general", Peltier said.
Antarctica is one of the world's fastest-warming regions.
"The kinds of changes that we see today, if they were not to increase much more. then maybe we're talking about something that is manageable for coastal stakeholders", said DeConto.
Fans can enter a sweepstakes to get hands-on experience with Black Ops 4's multiplayer in several Xfinity stores across the U.S. From there, you'll be granted access to the Black Ops 4 beta at a later date via an email code.
It will then come back to the Commons once more, when MPs likewise can reject or vote through amendments to the legislation. Shadow Brexit Secretary Sir Keir Starmer said: "The government's amendment is simply not good enough".
I know it's hard for you to understand even short sentences, I guess, but please don't take my words out of context. Leaking that information, Sanders reportedly said, was "selfish" and damaged the administration.
Mission engineers are doubtful that the rover has enough sunlight to charge back up for at least the next several days. It could take several more days before it is known whether the storm is encircling the entire planet.
And it wasn't just the usual get-together of old friends - it was also a music video shoot for Drake's new song, " I'm Upset ". The video shows the cast reprising their characters and calling back to famous moments in the series.
Former Oregon linebacker Fotu Leiato, 21, was killed in a auto crash on Friday, Eugene police confirmed early Saturday morning. Following the second arrest , Ducks head coach Mario Cristobal made a decision to dismiss Leiato from the program.
The interesting news is that Bannon is considering launching his very own cryptocurrency and entering the crypto space in style. Bannon's interest in the creation of new cryptocurrency puts him in the scam-filled part of the cryptocurrency business.
The late reggae music icon won several awards including the Nigeria Music Awards and Fame Music Awards among others. Aralola, popularly called Ara on stage, said this while expressing her shock over the death of the reggae Rastaman.
Toronto assistant Nick Nurse to coach Raptors
But the team was again bounced from the playoffs by LeBron James and the Cleveland Cavaliers, and Casey was let go shortly after. Nick climbed the coaching ladder to Grandview and later the Iowa Energy and now moves from assistant to head coach in Toronto.
Mickelson throws 'putting tantrum' at US Open
He had four consecutive bogeys before parring the 12th, despite the serenading of "Happy Birthday" from the crowds at every hole. It was about to start rolling down another ridge when Mickelson ran after it and hit it back toward the hole.
Astronomers see how black hole rips apart star
The observation will help astronomers understand these events, as well as the environments in which galaxies developed. The galaxy in question is actually two galaxies colliding, so the region known as Arp 299 is rich with supernovae.