Since measurements of Jakobshavn Isbrae were first taken in 1850, the glacier has gradually receded, finally coming to rest at a certain point for the past 5 decades. However, from 1997 to 2003, the glacier has begun to recede again, this time almost doubling in speed. The finding is important for many reasons. For starters, as more ice moves from glaciers on land into the ocean, it raises sea levels. Jakobshavn Isbrae is Greenlands largest outlet glacier, draining 6.5 percent of Greenlands ice sheet area. The ice streams speed-up and near-doubling of ice flow from land into the ocean has increased the rate of sea level rise by about .06 millimeters (about .002 inches) per year, or roughly 4 percent of the 20th century rate of sea level increase. This animation shows the recession for three years, from 2001 through 2003. The line of recession shows the place where the glacier meets the ocean and where pieces calve off and flow away from land toward open water.


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NSDL,GCMD--Location--Greenland,Undergraduate (Lower Division),Landsat-7-ETM+,NSDL_SetSpec_456144,Physical sciences,Graduate/Professional,Space Science,oai:nsdl.org:2200/20061002144704775T,GCMD--EARTH SCIENCE--Hydrosphere--Glaciers-Ice Sheets--Glacier Motion-Ice Sheet Motion,Astronomy,Cryology,Higher Education,Undergraduate (Upper Division),Science,GCMD--EARTH SCIENCE--Spectral-Engineering--Visible Wavelengths--Visible Imagery,GCMD--EARTH SCIENCE--Cryosphere--Glaciers-Ice Sheets--Glacier Motion-Ice Sheet Motion,Chemistry,Physics,Ecology, Forestry and Agriculture,Earth science,Geoscience,Space sciences



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