The sea, "responsible" for heat transfer to the Arctic, was found

29.11.2019

The sea, "responsible" for heat transfer to the Arctic, was found

Russian oceanologists have found out that melting ice from Greenland does not have a significant effect on the "transfer" of heat to the Arctic, but they have found processes in the Irminger Sea that can significantly affect global warming.

According to the press service of St. Petersburg State University, whose staff is part of the research group, unexpected conclusions were made due to the study of deep convection in the North Atlantic.

Scientists have long identified convection areas when water cools on the surface of the ocean. As a result, its density increases and it goes to the bottom.

There are few such areas. Areas of deep convection are found in the Irminger, Labrador and Greenland Seas.

At St. Petersburg State University, convection is compared with the global conveyor, noting that if the ocean gives off more heat, then the processes are accelerated.
 
Oceanologists have been studying convection since 2017 as part of a grant supported by the Russian Science Foundation.
 
During the latest surveys, scientists used observational data from the middle of the last century and compiled an algorithm that allows us to analyze how intense convection was in different years.
 
It turned out that there was a 30-year cycle of convection development. Now, for example, the speed of warming is decreasing.

The regions where deep convection takes place are relatively small in area, and the diameter of such locations is about 100 kilometers. For example, scientists did not attach much importance to the site in the Irminger Sea. But a recent study showed that this location was responsible for the "transfer" of warm water into the Arctic.

It is worth noting that the role of convection in global warming has not yet been fully studied. But the developments of St. Petersburg scientists help to understand global processes in the oceans.


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