The Greenland ice cover thawed a bit more assuredly in the past than in the present due to geological alterations and majority of Greenland’s ice can be rescued from melting if warming is regulated. David Pollard, research professor in the Earth and Environmental Systems Institute at Penn State said that there is geological evidence that proposes the ice sheet was more subtle to warming and temperature disparities in the past million years.
Excessive warming will engender Greenland to overlook a sizeable portion of its ice in the near future but majority of research signifies that the gateway warmth for total ice loss has not yet been arrived at yet. Paleoclimatic records signify that majority of Greenland was bereft of ice in the last 1.1 million years even though temperatures then were not much hotter than situations today. To elucidate this researchers indicate to their prevailing excessive heat under the ice sheet in the past than the present.
Data portrays that when Iceland hotspot progressed under North Central Greenland 80 to 35 million years ago it endowed molten rock deep underground but did not intercept through the elevated mantle and crust to engender volcanoes as it was endowed in west and the east. The Earth’s climate then was extremely hot for Greenland to possess an ice sheet evolved growing and shrinking sequential with ice ages. Richard Alley, Evan Pugh University Professor of Geosciences said that the proposition is that loading and unloading, stiffening and unstiffening from ice ages drained into partially melted rock that was abandoned deep under Greenland by the Iceland hotspot and engendered that melt up.