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Environment

Arctic ice is melting at twice the expected rate

Scientists say Arctic ice is thinning twice as fast as we thought

June 5 2021
Gianluca RiccioGianluca Riccio
⚪ 3 minutes
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In a new studio Published today in the journal The Cryosphere, a team of researchers extrapolated how temperature, snowfall and the movement of ice floes can affect snow accumulation.

The results that come out are not at all reassuring: the sea ice that covers much of the Arctic seems to be thinning twice than previously thought.

A more accurate calculation method than ever.

Previously, we had to rely on data collected from Soviet expeditions to frozen sea ice masses between 1965 and 1991.

The new computer model, which estimated snow cover from 2002 to 2018, is much more detailed because it is based on a greater amount of data, and more up-to-date.

Ice
Photo by Brian Rodriguez on Unsplash

Also for this reason, the data on the rate of melting of the ice is a worrying sign. And it confirms that the effects of climate change could accelerate at an alarming rate.

The article continues after the related links

Super white paint on 1-2% of the planet and goodbye climate change? Easy to say

The Arctic will be ice-free by 2030: science's warning cry

Boiling ice

Snow is an important factor in judging the health of ice shelves in the Arctic, but it is difficult to track because it is invisible to satellite radars.

"Sea ice thickness is a sensitive indicator of Arctic health, and as the Arctic warms, the world warms," ​​says lead author. Robbie Mallett of University College London.

Arctic ice
Photo by Willian Justen de Vasconcellos on Unsplash

"Sea ice started forming later in the year, so the snow on top has less time to accumulate," Mallett said. "Our calculations take this decrease in snow depth into account for the first time."

Thinning of the ice will aggravate a number of concomitant problems

Arctic ice
Photo by Annie spratt on Unsplash

"The thicker ice acts as an insulating blanket, preventing the ocean from warming the atmosphere in the winter and protecting it from the sun in the summer," Mallett added. "The thinner the ice, the less likely it is to survive the Arctic summer melt."

Researchers believe rapid changes in the Arctic could also contribute to extreme weather events, including droughts and floods in the Northern Hemisphere.

With the melting of large masses of ice, shipping routes are becoming shorter and shorter. In February, a merchant ship made its first visit to winter a round trip in Siberia between China and Europe.

This also means a greater risk of oil spills in the Arctic, according to Mallett.

Scientists, however, are optimistic that the new monitoring models could allow them to better predict the long-term effects climate change is having on the Arctic and possibly ways to slow sea ice disappearance.

Tags: ArcticClimate Changeglaciers

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