Arctic: How an ice-free polar sea affects the weather on continents

Science Arctic

How an ice-free polar sea affects the weather on continents

PolaIn the North Pole region, air temperatures are rising about twice as fast as in other regions of the worldr bear mother (Ursus maritimus) and cubs on ice floe

In the North Pole region, air temperatures are rising about twice as fast as in other regions of the world

Source: Getty Images/Johnny Johnson

While the light-colored pack ice reflects most of the solar radiation, the dark, ice-free ocean absorbs more thermal radiation from the sun. This is causing the ice in the Arctic Ocean to melt even faster, according to a new study from Japan.

Dhe ice retreat in the Arctic Ocean affects the weather on the mainland in the north: Because the air can absorb more water over the open ocean, heavy rain and snowfall events are becoming more frequent in northern Siberia (Russia), for example. This in turn affects the thawing permafrost, from which the strong greenhouse gas methane escapes. These are the results of a study by a group of scientists led by Tomonori Sato from Hokkaido University in Sapporo (Japan). The study is in Journal “npj Climate and Atmospheric Science” appeared.

Sato and colleagues used JRA-55, a high-quality and homogeneous data set from the Japan Meteorological Agency. Based on this data, they simulated the humidity and precipitation in northern Siberia in the period 1981 to 2019. Result: The larger the ice-free areas in the seas north of Russia were, the more humidity was carried to Siberia. The marine areas include the Barents Sea, the Kara Sea and the East Siberian Sea. Despite large fluctuations between the individual years, there was a trend towards more snowfall in autumn – more in western Siberia (west of the Urals) than in eastern Siberia.

“Our results highlight the importance of monitoring equatorial moisture transport during the snow accumulation season, as this could amplify local snowstorms if evaporation from the Arctic Ocean increases in the near future,” the researchers write. In the North Pole region, average air temperatures are rising about twice as fast as in other regions of the world. One reason: While the light pack ice largely reflects the sun’s rays, the dark, ice-free ocean absorbs more heat radiation from the sun, causing the ice to melt even faster.

also read

The popular whale-watching tourism is also not good for the animals

also read

According to the WWF, the Southern Ocean is warming up faster than other marine regions as a result of the climate crisis

Penguins and whales in danger

In autumn, the water in the Arctic Ocean is still relatively warm and the north winds can absorb a lot of evaporating water and carry it to the Eurasian continent. With increasing global warming, precipitation is also likely to fall more frequently than rain. “Extreme precipitation events in autumn could accelerate the deepening of the active layer in permafrost areas,” the researchers warn. A lot of carbon is stored in the permafrost soil, which escapes as methane when it thaws, for example, which as a greenhouse gas is around 25 times more potent than carbon dioxide (CO₂).

also read

Brand Story MARINE RESEARCH

advertisement

Sato’s team focused their study on Siberia. However, a pronounced southward extension of Arctic moisture is also found over the Bering Strait and the region from northeastern Canada to Baffin Bay, but not in Greenland. Previous studies have linked heavy snowfall in Europe to low ice cover in the northeastern Barents Sea.

also read

A 30 km wide fire front in Siberia in August 2020

The researchers recommend that future studies should address linking changes in evaporation, moisture transport and storm track along coastal regions of the Arctic Ocean. “Monitoring Arctic moisture behavior should be important for studies related to severe snowstorms in regions around the Arctic Ocean, since southward moisture transport is likely to be associated with cold air outbursts from the polar air mass,” they write.

You can listen to our WELT podcasts here

In order to display embedded content, your revocable consent to the transmission and processing of personal data is required, since the providers of the embedded content as third-party providers require this consent [In diesem Zusammenhang können auch Nutzungsprofile (u.a. auf Basis von Cookie-IDs) gebildet und angereichert werden, auch außerhalb des EWR]. By setting the switch to “on”, you agree to this (which can be revoked at any time). This also includes your consent to the transfer of certain personal data to third countries, including the USA, in accordance with Art. 49 (1) (a) GDPR. You can find more information about this. You can withdraw your consent at any time via the switch and via privacy at the bottom of the page.

“Aha! Ten minutes of everyday knowledge” is WELT’s knowledge podcast. Every Tuesday and Thursday we answer everyday questions from the field of science. Subscribe to the podcast at Spotify, Apple Podcasts, deezer, Amazon Music or directly via RSS feed.

See more here

See also  These pets are allowed to bury them in the garden

Leave a Reply

Your email address will not be published. Required fields are marked *