2010 has been a very unusual year for the Greenland ice.
To the south and west of the island it was the hottest year on record. After a warm winter with little rainfall occurred in early spring with unusually high temperatures, resulting in the melting took low start. This set the tone for the rest of the season, ending an unusually late — in mid-September, 50 days later than average.
The image brings to your attention, is based on data obtained microwave radiometry system Special Sensor Microwave / Imager. It is installed on the satellites of the program of Defense Meteorological Satellites. Snow and ice are known to emit microwaves, and the signals of wet and dry snow are different, which allowed Marco Tedesco, a professor at the City College of New York (USA), to compare the length of the melting period in 2010, with indicators of 1979-2009 years.
During the melting of snow and bright fine powder into a coarse dusky mass. The larger grains, the less light is reflected snow. As a result, more energy is absorbed, and the melting is accelerating. When all the snow had fallen during the year disappears, exposing the glacier surface is darker.
Melting ice in Greenland desalinates Arctic seas and contributes to rising sea levels. According to some estimates, by 2100 the last increase by 60 cm, but the forecast has been actively challenged, because Greenland is deprived of its main asset quicker than expected.
|In the yellow and red colors show areas where melting lasted longer than average, blue — less. (Photo NASA Earth Observatory / Robert Simmon / Marco Tedesco / City College Of New York.)|
Prepared according to NASA.