January 17, 2013. Global climate change leads to a widening of the snow cover Northern Hemisphere and in Siberia, said Thursday the director of the Institute of Geography RAS Vladimir Kotlyakov, speaking at the World Forum of snow.
"There is a paradox — a warming that is now characteristic of the world becomes more snow. This occurs in large areas of Siberia, where the snow is more than it was a decade or two ago, "- said the honorary president of the Russian Geographical Society Kotlyakov.
According to the geographer, the trend expansion area of snow in the Northern Hemisphere, scientists observe the 1960's, when satellite observations began the spread of the snow cover.
"Now the era of global warming, and with increasing temperature and increasing moisture content of air masses, so in the colder areas of increased snowfall. This shows the great sensitivity of snow cover for any changes in atmospheric composition and its circulation, and this must be kept in mind when evaluating any human impact on the environment ", — explained the scientist.
In general, in the Northern Hemisphere snow is much more than in the South, where it prevents the spread of the ocean. In February, the snow covered 19% of the area of the globe, with 31% of the Northern Hemisphere and 7.5% of the area of the Southern Hemisphere.
"In August snow covers only 9% of the entire globe. In Northern Hemisphere snow cover during the year varies by more than seven times, and in the South — less than half "- added Kotlyakov.
According to the National Oceanic and Atmospheric Administration (NOAA) USA, in December 2012, the total area snow cover in the Northern Hemisphere was the largest in more than 130 years of observations — it almost 3,000,000 square kilometers and has exceeded the average of 200 thousand square kilometers exceeded the record of 1985. On average, according to U.S. meteorologists area snow cover in the Northern Hemisphere winter grew at a rate of about 0.1% per decade.