A new study highlighting the risks posed by melting glaciers found that global sea level rose by about eight meters as the Eurasian ice sheet melted about 14,000 years ago.
At 4.6 billion years old, the Earth ice age lived. The last of these began about 33,000 years ago, when vast ice sheets covered most of the Northern Hemisphere. Spread to much of Scandinavia at the time Eurasian ice sheetcontained about three times the amount of frozen water found in the present-day Greenland ice sheet.
A new study published Monday in Nature Geoscience shows that this massive ice sheet is just Over a period of 500 years showed that it melted. In the Norwegian Sea, the team found that the collapse in the ice sheet contributed to an event known as Meltwater 1A, a period when global sea levels rose by 25 meters 13,500-14,700 years ago.
Eurasian ice sheet melted over a period of just 500 years
The study’s lead author, Jo Brendryen of the University of Bergen in Norway, said that the Eurasian ice sheet melting coincides with wide regional temperature fluctuations. On the greenland ice sheet Expressing that the samples show that the atmosphere above Greenland warmed up to 14 degrees in a few decades during that period, Brendryen said “We think this temperature change is the main driver of ice sheet collapse” said.
World, global climate change some parts of the world, such as the poles, are warming much faster than others. The concentration of carbon dioxide (CO2) in the atmosphere that caused the planet’s warming was now more than 415 ppm, at that time around 240 CO2 per 1 million particles.
Concern is that the melting of the glaciers will continue despite the decrease in CO2 concentration in the atmosphere
The Greenland ice sheet is currently melting at record speed, containing enough frozen water to raise global sea levels by more than six meters. Only in 2019 More than 560 billion tons Losing a mass of ice, Greenland is melting six times faster than in the 1990s.
The new work done Eurasian ice sheet revealed that its melting in a few centuries raised global sea level by more than four centimeters a year (4.5-7.9 meters in total) Ice sheets that melt or break up as global temperatures increase, drag the planet to the edge of the abyss. Of course for humanity …
Greenland and West Antarctica’s ice sheets CO2 concentration afraid that it will continue to melt even though it decreases. Brendryen, “Our research supports this idea, as the sea-based regions of the Eurasian ice sheet suddenly disappeared and do not return.” used the expressions.
Source: https: //phys.org/news/2020-04-eurasian-ice-sheet-collapse-seas.html
