Recorde do degelo na Gronelândia em 2010

A NASA Earth Observatory tem um mapa que mostra que o recorde do degelo da calote de gelo da Gronelândia foi batido em 2010, durante o qual o derretimento começou mais cedo e durou mais tempo do que o habitual. 

“This image was assembled from microwave data from the Special Sensor Microwave/Imager (SSM/I) of the Defense Meteorological Satellites Program. Snow and ice emit microwaves, but the signal is different for wet, melting snow than for dry. Marco Tedesco, a professor at the City College of New York, uses this difference to chart the number of days that snow is melting every year. This image above shows 2010 compared to the average number of melt days per year between 1979 and 2009.”