Sunday, 30 January 2011
So far, it was thought that the increase in ice melt lubricated, causing sinking faster. It is uncertain what the total impact of rising temperatures in the seas about the melting ice, which means that it is difficult to limit the potential for higher sea levels.
But, said Andrew Shepherd, a university professor and leader of the study, the melting ice in Greenland is safer than thought. The team used satellite images to monitor the progress of the sea ice west of the country as it moved through the sea during the summer for five years.
The researchers were concerned that the higher the melting layer on the surface of the warmest years on, the more likely the base of the ice would slide, which would melt and raise the sea level.
But they found that above a certain limit, the slip becomes slower. Other studies indicate that larger volumes of meltwater form on different channels under the ice, draining the water more efficiently and reduce the formation of the lubrication that helps to melt it.
The area studied by the researchers in Greenland has about a thousand feet thick. If all the ice melted, sea levels could rise by seven meters, but it is believed, for it occurred, would take over 3000 years - is the only way to warming seas are the winds