The drainage of the Great Russian Rivers Ob, Yenisei and Lena has increased as a result of global warming. The annual amount that pours into the Arctic Ocean lies, today, with about 1700 cubic kilometres per year higher by about ten percent more than 60 years ago.
"It does not take too dramatic, but it is a long-term trend exists,". The results are in the journal "Nature Climate Change" published.
Consequence of the air heating
The research had shown a correlation between the increase of the water in the rivers and the large-scale changes in atmospheric circulation, said a professor of physical oceanography. One factor is the heating of the air. This could carry more water and lead to greater amounts of precipitation.
Also playing the past few years observed shift of the Iceland-lows to the east a role. In addition, more frequent in Europe will be the dominant zone flow replaced (along the latitude) by a meridional flow (along the longitudes). "That means that more moisture is transported into the influence of these rivers,".
The results fit well with the data according to the current knowledge of climate change. The trend towards greater freshwater runoff in the investigated area is expected to continue with the progress of global warming continues.
In the long term impact on European climate
The current development is uncertain, however, there are enormous fluctuations from year to year. The previous increase in the outflow had no greater impact on the Arctic Ocean. Basically, could have very large amounts of fresh water, but the influence on North Atlantic circulation, which influences the climate in Europe significantly.
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