April 14, 2024

The floating ice cabinets of northern Greenland, whose function is essential in regulating the quantity of contemporary water launched into the ocean, have misplaced greater than a 3rd of their quantity since 1978, scientists warn in a examine printed Tuesday.

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Researchers from Denmark, the USA and France used hundreds of satellite tv for pc pictures, co

Mixed with area measurements and modeling to reconstruct the evolution of those platforms that reach the glaciers to the water.

“Since 1978, northern Greenland’s ice cabinets have misplaced greater than 35% of their complete quantity, three of them have collapsed utterly,” conclude the authors within the journal Nature Communications of the eight ice cabinets current within the area.

“The principle cause is that they melted because of the warming of the seawater beneath,” Romain Millan, researcher at CNRS and the College of Grenoble and lead writer of the examine, tells AFP.

“We’ve got seen a really vital improve in melting for the reason that 2000s, which is clearly linked to the rise in ocean temperatures on this sector and over this era,” he factors out.

Melting of those platforms doesn’t instantly contribute to sea degree rise.

Then again, these platforms play the function of a “dam” that regulates the quantity of frozen contemporary water poured from the cap into the ocean and, in flip, participates on this phenomenon.

The disappearance of those pure dams due to this fact has a major influence on the glaciers, whose anchor factors on the bottom are receding and that are shedding extra ice than earlier than.

“For instance, the Zachariæ Isstrøm glacier, which misplaced its platform in 2003, nearly doubled the quantity of ice it launched into the ocean,” notes Romain Millan.

These conclusions are all of the extra alarming as a result of the glaciers on this area have been beforehand thought of by scientists to be steady, in distinction to different extra fragile areas of the polar ice cap, which started to weaken within the mid-Nineteen Eighties.

“What’s going to occur sooner or later on the poles and at sea degree will rely upon coverage choices to scale back greenhouse fuel emissions,” remembers the researcher in regards to the local weather in Dubai just a few weeks earlier than COP28 (November thirtieth – December twelfth) . ).