NEW YORK — One of the coldest regions on the planet appears to be losing its ability to retain the frigid climate necessary to regulate temperatures in the rest of the world.
Scientists have determined that in the last 10 to 20 years of steady global warming, the ocean has played an"important role" in the evolution of glaciers, Eric Rignot, professor of system science at the University of California, Irvine, and author of the study, told ABC News.
However, the researchers found that the seawater is"regularly' intruding beneath the glacier for a sizeable distance that was initially assumed to be"very small," Rignot said. Unlike previous models, the highest ice sheet melt rates recorded were within the zone of grounding line migration, which was estimated to be around 60–100 meters of ice melt per year -- or up to 328 feet per year.
The researchers analyzed a time series of ice sheet motion and surface elevation data derived from satellite observations to estimate the grounding line migration and basal melt rates for glaciers since 1992. As the region warms, Arctic amplification causes the sea ice, which is white, to thins or disappear, allowing dark ocean or land surfaces to absorb more heat from the sun and release that energy back into the atmosphere.
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