Greenland Glacier Melt Actually Warped Earth’s Crust
When a glacier in Greenland has melted in the summer of 2012 unusually hot, it pushed as much water as the crust of Earth deforms and caused a massive wave of ice and water and headed towards the sea.
This wave is a phenomenon recently identified by researchers in the climate and represents another worrying trend, as current estimates of sea level rise may be underestimated, according to a new study published yesterday in Geophysical Research letters. The wave caused the loss of ice in the Rink glacier to increase more than 50 percent, said Eric Ivins, a scientist at NASA’s Propulsion Laboratory and co-author of the study.
“We did not know that we would find this phenomenon, and it shows that when the ice reaches the bottom of the ice sheet, do not wake up,” he said. “You do something for the whole system to make it move faster.”
The glacier trail is one of the first glaciers in Greenland to dump the ice into the ocean. Dredging 11 billion tons of ice in the ocean in early 2000. This is the weight of 30,000 Empire State buildings. However, in the hot summer of 2012, due to the wave that generates 6 billion additional tons of ice and water.
This increase in the volume of ice and water disturbed scientists, because it could mean that global warming could lead to more intense ice loss in the future. The melting of land ice in Greenland is the main cause of sea level rise.
“The real concern here is to understand how this merger event, if it is repeated more and more in the future, how will they affect the ice sheet is already busy to respond?” Said Eric Larour, co-author of the paper and a scientist at JPL.
The Arctic is already a profoundly different place than it is ten years because of global warming, according to Walt Meier, a researcher at NASA’s Goddard Space Flight Center, who has not participated in the study. In a recent newsletter from the region, researchers from the National Oceanic and Atmospheric Administration determined that 2016 was the warmest year recorded for the region and record sea ice levels were measured.
Because the summers of 2010 and 2012 were so warm in Greenland, over 95 percent of the surface of the ice melted. There was also an accumulation of snow and ice in the pond in the center of Greenland, a glacier behind the ice rink. Greenland lost an average of over 250 billion tonnes of ice per year, but in 2012, it has increased.
Researchers found that the wave moved at a speed of about 2.5 miles per month in June, from the merger of the season. By September, however, the speed of the wave had increased to 7.5 miles per month. Usually, the glacier moves at the speed of about 1 or 2 miles per year, according to the researchers.
The ice mass in the wave moved quickly because the melting water lubricates the ice base and softened areas on the side where it joins with rocks or other glaciers, the researchers found. He moved 15 miles in about four months.
The movement of the night wave relatively fast to scientists, as it shows a warming causing a significant increase in the loss of ice from glaciers on Earth, which helps to raise sea level. They fear that warming later in the future, as predicted by scientists, could lead to accelerated ice loss that was not considered in conditions to raise sea level.