Thursday , March 4 2021

A slight warming endangers the "irreversible" loss of ice ranges, the study warns – Environment



Even small increases in temperature, agreed upon in an international plan to limit the climate disaster, could see that ice horns have melt enough over the course of the century, as their losses are "irreversible", experts warned on Monday.

The 2015 Paris Agreement limits countries where the temperature rises "well below" two degrees Celsius (3.6 degrees Fahrenheit) above pre-industrial levels and below 1.5 C, if feasible.

The fact that by the year 2100 1.5-2C is hot is the best scientist's scenario based on the consumption of our natural resources and the burning of fossil fuels, and will create a need for radical, global changes in lifestyle.

In comparison, human perception is usually the approach – if we continue to radiate greenhouse gases at current speed – Earth's heat will be visible even at 4 ° C.

Scientists have known for decades that the glaciers in Greenland and Antarctica ruptures, but it was assumed that the temperature rise of 1.5 to 2 ° C would remain relatively untouched.

However, according to a new analysis published in the journal Nature Climate Change, even modest global warming can cause irreparable damage to the polar ice, which contributes to catastrophic rise in the sea level.

"We say 1.5-2C is close to the border, which can be expected to have dramatic effects on ice," said AFP, Frank PATTINS, head of the Free University of Barcelona and author of scientific research.

His team collected data on annual temperature increases, ice sheet coverage and known melting levels and found that both Greenland and Antarctic ice stands would reach around 2 ° C.

"Existence of a point of failure means that the changes to the ice sheets are potentially irreversible – returning to the industrial climate may not improve the ice as soon as the failure point is crossed," Pattin said.

Read also: Five things you need to know about Greenland

– "the turning point of this century" –

The ice in Greenland and Antarctica contains enough frozen water to increase the altitude of several meters.

Only the Greenland ice pack has increased the global sea level rise by 0.7 millimeters since the mid-1990s.

And the poles are warming faster than anywhere else on Earth, while Greenland has only 5C warmer in the winter and 2C in the summer since that time.

Although scientists predict that, although they could melt with a huge global temperature increase, simulation years will need it, Monday's study further raises concerns about the only realistic plan of humankind to prevent continuous warming.

Many models in the 1.5-2C scenario allow for a short period of time to exceed the limit value that potentially heats the planet at several levels at the highest level, before carbon capture and other technologies are used, in order to bring the temperature back to 2100.

However, the study warned of this approach, but arguing that the feedback loop connected to higher temperatures would "lead to self-sufficient melting of all ice coils", even if these increases were later offset.

In the case of Greenland, the team, with 95 per cent confidence, said that a large ice stream would drop by heating 1.8C.

"Both Greenland and Antarctica know that warming rates can be reached by the end of this century," Pattin said.


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