'World's most unsafe glacier' could cause catastrophic sea level rise, study warns

11 Juillet, 2019, 07:35 | Auteur: Therese Cote
  • Huge glacier melt could cause 20 inch rise in global sea levels

Alex Robel, another study author, added that if the glacier were to cross that Rubicon, nothing could stop the ice melt - even if Earth's temperatures stopped rising.

Thwaites fglacoer measures approximately 70,000 miles (about the size of the U.S. state of Florida) and scientists have warned it is reaching "tipping point", meaning it will be impossible to reverse the process of the glacier melting and raising sea levels.

What's more ominous, the research finds, is that once this instability is triggered it's hard, if not impossible, to stop.

Modelling simulations suggested extensive ice loss would start in 600 years but the researchers said it could occur sooner depending on the pace of global heating and nature of the instability.

If both abruptly collapsed, allowing ice far inland to flow faster into the oceans, world sea levels could rise by more than a metre (three feet), threatening cities from Shanghai to San Francisco and low-lying coastal regions.

The ice giant is heading towards a doomsday "instability" which once crossed means it could all float out into the sea and melt within 150 years, the NASA-funded study found. "There is nearly eight times as much ice in the Antarctic ice sheet as there is in the Greenland ice sheet and 50 times as much as in all the mountain glaciers in the world", Robel said. Satellite data showed Antarctica lost as much sea ice in four years as the Arctic lost in 34 years. This increased uncertainty about future sea level rise but made the worst-case scenarios more likely.

The warnings were based on the latest simulations of hidden "instabilities" underneath Antarctica's glaciers.

"Climate variations will still be important after that tipping point because they will determine how fast the ice will move".

Current sea levels are almost 20cm above pre-global warming levels and are blamed for increased coastal flooding across the world - which can result in loss of life.

Kanye West Is Building 'Star Wars' Inspired Housing Units For Homeless
She explained that Kanye and his collaborators created eight prototypes before settling on this one, and demonstrated how it works.

Buns Sold At Walmart, Aldi, Sam’s Club, And Others May Contain Plastic
The company initiated the recall after discovering small pieces of hard plastic in production equipment. The buns are sold nationwide under Brand Names like Wal-Mart's Great Value, Wonderbread, and Nathans.

N.Korea Marks 25th Anniversary of Founder's Death
North Korean leader Kim Jong-un's sister now appears to be the ninth most powerful figure in the regime. North Korea is observing the 25th anniversary of the death of its late founder, Kim Il Sung.

The researchers explained huge ice shelves rested on the continent's bedrock beneath the water line.

If and when the glacier becomes unstable, the after-effects can be considered "catastrophic".

"Ice flows out into the floating ice shelf and melts or breaks off as icebergs".

Mr Seroussi added: "The process becomes self-perpetuating".

Its top boffins warned that the growing hole is already as tall as London's Shard skyscraper, and covers an area the size of 10,000 football pitches.

The simulations spanned several centuries, as is common for studies on sea level rise.

As it grows, Thwaites will disintegrate faster and faster, potentially triggering a global catastrophe. That melting gives rise to cavities: An early Manhattan-sized gap was discovered under the Thwaites Glacier in February.

"As more heat and water get under the glacier, it melts faster". "Once the ice is past the grounding line and just over the water, it's contributing to sea level because buoyancy is holding it up more than it was", Robel said.

But Thwaites prevents its neighbour glaciers from flowing into the ocean, too. But their contribution to sea level rise pales in comparison to what we may see now that the Antarctic ice sheet faces a tipping point - a point of no return.

Conseillé:



Populaire

Hospitalized Albert Haynesworth in 'dire' need of transplant after suffering kidney failure
Former Washington Redskins player Albert Haynesworth said on social media Wednesday that he recently suffered kidney failure. According to a post on his Instagram, Haynesworth was hospitalized on July 7 after both his kidneys failed him.

Djokovic Enters Ninth Wimbledon Semi-Final
The world number one secured his 70th match win at the tournament and will be playing in his 36th semi-final at the majors. Pella looked tired as a limp backhand gifted the Spaniard a decisive break at the start of the second set.

Bentley EXP 100 GT Concept Previews Electric Future for the Brand
The five non-driving modes mean passengers can sit back and bask in the upscale interior while keeping their hands off the wheel. The rounded, bevelled headlights ditch the traditional Bentley two-roundel setup for something more streamlined.

Slovak Sagan claims fifth stage of Tour
Perhaps the former world champion thought a Hulk like effort was necessary for victory at this Tour de France. The sprint was not contested by pure specialists, who got dropped over the four climbs on the day's program.

The New Starbucks Tie-Dye Frappuccino Is Perfect for Your Instagram
The weather is getting hotter, which means it's the flawless time to grab a chilly new drink right in time for summer vacation. The brand new drink is called the Tie-Dye Frappuccino and you'll definitely want to get your hands on one.

Morgan urges England to embrace World Cup 'dream'
Morgan says his side are prepared for whichever combination Australia send out onto the field for the semi-final. The wicket tends to suit us, but also the support as well".

Bond yields creep higher as markets wait for Fed signals
Japan's Nikkei had also finished lower and Chinese blue chips barely budged as data showed inflation remained subdued. Brent crude futures rose 67 cents to $64.83, while United States crude gained 83 cents to $58.66 a barrel.

Third Walking Dead series casts its first three leads
Cantu, 15, already has an impressive list of acting work, though he's best known for his behind the scenes work as a voice actor. The Walking Dead spinoff will be showrun by writer and producer Matt Negrete alongside chief content officer Scott M.

Alligator in Humboldt Park Lagoon spotted as search continues for animal
A similar incident occurred in 2011 when two alligators were spotted just weeks apart in the Chicago River . He's there", Lopez said. "Ah, I can't come here no more... but now, with these things here, you never know".

Amal Clooney faults ‘collective shrug’ over slain journalist
President Donald Trump's vilification of the media makes journalists more vulnerable to abuse around the world. Human-rights lawyer Amal Clooney says U.S.