Greenland thaw unprecedented NASA reports

NASA has announced that its satellites have detected an unprecedented thaw of Greenland, as the melted area is one of the largest detected in 30 years of control in satellite observations. Recently detected a large iceberg was clear from the area called Petermann. This time with this report explains that most of the ice cover of Greenland, from his thin, low coastlines to its 2 kilometers thick center, experienced some degree of fusion on its surface, according to the three independent satellite measurements analyzed by scientists from NASA and the university. On average in the summer, about half of the surface of the Greenland ice sheet melts naturally.

 "The Greenland ice sheet is a large area with a varied history of change. This event, along with other natural phenomena, although rare, as the case of large delivery last week in the Petermann glacier, are part of a story complex, "said Tom Wagner, director of the Washington NASA cryosphere program.

 According to satellite data, it is estimated that 97 percent of the surface of the ice thawed at some point in mid-July. Investigators have not determined whether this event extensive merger affect the overall volume of ice loss this summer and contribute to rising sea level. What we explain is that the higher parts of the ice tend to thaw, but equally freeze back in place, what is called FUSION, so near the coast, some water is retained by fusion the ice and the rest is lost in the ocean. But this year, as detected, the degree of melting ice in or near the surface greatly increased. 


Son Nghiem of the Jet Propulsion Laboratory in Pasadena, California, says that was the analysis of radar data from the Indian Space Research Organisation (ISRO) Oceansat-2 Satellite who last week made him realize that most of Greenland appears to have undergone fusion on its surface on 12 July. 


Nghiem said: "This was so extraordinary that at first I questioned the result: Is it real or due to an error of data?" . Then given the task to corroborate these results and consult with Dorothy Hall at Goddard Space Flight Center in Greenbelt, Maryland City of studying the surface temperature of Greenland with the Moderate Resolution Imaging Spectrometer (MODIS) on board NASA's Terra and Aqua satellites and confirmed by MODIS that temperatures were unusually high and that the melting was extensive on the surface of the ice. 


The melting quickly spread. The melting was shown on maps derived from three satellites and showed that the July 8, about 40 percent of the surface of the ice had melted. July 12, 97 percent had melted. This event coincided with the extreme fusion of unusually strong ridge of hot air, or a dome of heat over Greenland. 

This merger marked the Summit and the ice has not happened since 1889, according to ice cores analyzed by Kaitlin Keegan at Dartmouth College in Hanover, NH National Oceanic and Atmospheric Administration weather station Summit air at temperatures above or confirmed floated within one degree of freezing for several hours 11-12 July. Ice cores  can have fusion events every 150 years on average. Indicate that it may be of concern if such events were still observed in FUSION type the coming years, as it can alter sea level globally and some villages near the coast disappear.