Greenland ice sheet melted at unprecedented rate during July 2012
By Suzanne Goldenberg, US environment correspondent, www.guardian.co.uk
24 July 2012 The Greenland ice sheet melted at a faster rate this month than at any other time in recorded history, with virtually the entire ice sheet showing signs of thaw. The rapid melting over just four days was captured by three satellites. It has stunned and alarmed scientists, and deepened fears about the pace and future consequences of climate change. In a statement posted on NASA’s website on Tuesday, scientists admitted the satellite data were so striking they thought at first there had to be a mistake. “This was so extraordinary that at first I questioned the result: was this real or was it due to a data error?” Son Nghiem of Nasa’s jet propulsion laboratory in Pasadena said in the release. He consulted with several colleagues, who confirmed his findings. Dorothy Hall, who studies the surface temperature of Greenland at NASA’s space flight centre in Greenbelt, Maryland, confirmed that the area experienced unusually high temperatures in mid-July, and that there was widespread melting over the surface of the ice sheet. Climatologists Thomas Mote, at the University of Georgia, and Marco Tedesco, of the City University of New York, also confirmed the melt recorded by the satellites. However, scientists were still coming to grips with the shocking images on Tuesday. “I think it’s fair to say that this is unprecedented,” Jay Zwally, a glaciologist at NASA’s Goddard Space Flight Center, told the Guardian. The set of images released by NASA on Tuesday show a rapid thaw between 8 July and 12 July. Within that four-day period, measurements from three satellites showed a swift expansion of the area of melting ice, from about 40% of the ice sheet surface to 97%. Zwally, who has made almost yearly trips to the Greenland ice sheet for more than three decades, said he had never seen such a rapid melt. About half of Greenland’s surface ice sheet melts during a typical summer, but Zwally said he and other scientists had been recording an acceleration of that melting process over the last few decades. This year his team had to rebuild their camp, at Swiss Station, when the snow and ice supports melted. He said he was most surprised to see indications in the images of melting even around the area of Summit Station, which is about two miles above sea level. It was the second unusual event in Greenland in a matter of days, after an iceberg the size of Manhattan broke off from the Petermann Glacier. But the rapid melt was viewed as more serious. “If you look at the 8 July image that might be the maximum extent of warming you would see in the summer,” Zwally noted. “There have been periods when melting might have occurred at higher elevations briefly – maybe for a day or so – but to have it cover the whole of Greenland like this is unknown, certainly in the time of satellite records.” […]
Greenland ice sheet melted at unprecedented rate during July
IF Things can melt at an unprecedented rate, they can also Freeze at an Unprecedented Rate. Before every great Ice Age there has also been a great Temp Increase. I would start looking at pattern migrations of animals and insects. Spmething of biblical proportions is about to happen, whether that is the tipping of the poles or what have you. I would also look at the increased solar flare activity and note that usually two days to a week after major solar flares; there is always increased activity especially in the ring of fire with Earthquakes and Volcanic activity. I find that corelation almost disturbing.