Lake Kaffeklubben (detsk. Kaffeklubben Sø, 83 37′) is located on a small (48 ha) of the eponymous island. to the North of Greenland, only 707 km from the pole. This is the most Northern lake on the Earth.
For a long time scientists argued about whether to receive life in such places, the impulse to reproduce as a result of nitrate pollution, or make her stop the impending effects of global warming. It seems that an international group of researchers under the guidance of Bianca Perren of the University of Franche-comté (France) managed to answer this question.
Water near the shore Kaffeklubben. No, not the result of a continuous thawing, and only a puddle formed on the surface of thick ice. Nevertheless, diatoms thrive already, for the first time in 2,400 years. (Photo by Bianca Perren et al.)
Despite the harsh living conditions, once the lake was full Kaffeklubben life in the face of cyanobacteria. The ice over the lake while constant, varying only the thickness. But even under 1-2 m of ice cyanobacteria survive. However, they are most active in summer when the air temperature above the ice reservoir is as high as +1,6 C. But more complex forms of life here. But now, but once…
3 500 years ago, when the lake had just been formed, it occupied several Continue reading
Over the largest of the Great lakes — Upper began to blow strong winds. So Yes, that started to change the lake ecosystem. The cause of the phenomenon and the consequences to find out, scientists from Wisconsin.
In canadian-American shore of lake superior, the largest area of freshwater lake in the world, over the last 20 years have seen major changes. Professor of Ankur Desai (Desai Ankur) from the University of Wisconsin and his colleagues came to an unexpected conclusion: the increase in the temperature of atmospheric air in the summer has led to the fact that the speed of the winds blowing over the lake has increased. According to scientists, for the same reason, the increased speed and currents. Naturally, such changes could not but affect the inhabitants of the water.
While in sight of limnologen (Ostrovidov) managed to get only the phytoplankton. The scientists conducted their research since 1985. Based on data collected using three hydrological buoys and satellite imagery, Professor Desai and his colleagues have figured out what is going on with the Top.
The lake warms up…
According to scientists, the temperature in the surface layers of the lake during the summer period increased at a rate of 1.2°C in one decade. And the water heats up 15% faster than the air over the lake. Continue reading