Global Ice Sheet Mapping Observatory
نویسندگان
چکیده
منابع مشابه
Mapping Greenland by ERS-1/2 InSAR for ice mass balance and dynamics studies
We are conducting an ESA ERS-AO3 study aiming at mapping ice elevations and flow rates for the Greenland ice sheet and glaciers. Such data are required by the Global Change community for monitoring changes of mass balance of ice sheets and glaciers, by ice modelers for verifying ice dynamics models, and for estimating changes in fresh-water input from land-ice masses to the sea, which have impa...
متن کاملDecay of the Greenland Ice Sheet due to surface-meltwater-induced acceleration of basal sliding
Simulations of the Greenland Ice Sheet are carried out with a high-resolution version of the ice-sheet model SICOPOLIS for several global-warming scenarios for the period 1990–2350. In particular, the impact of surface-meltwater-induced acceleration of basal sliding on the stability of the ice sheet is investigated. A parameterization for the acceleration effect is developed for which modelled ...
متن کاملElimination of the Greenland Ice Sheet in a High CO2 Climate
Projections of future global sea level depend on reliable estimates of changes in the size of polar ice sheets. Calculating this directly from global general circulation models (GCMs) is unreliable because the coarse resolution of 100 km or more is unable to capture narrow ablation zones, and ice dynamics is not usually taken into account in GCMs. To overcome these problems a high-resolution (2...
متن کاملNorthern Hemisphere Ice-Sheet Influences on Global Climate Change
Large ice sheets actively interact with the rest of the climate system by amplifying, pacing, and potentially driving global climate change over several time scales. Direct and indirect influences of ice sheets on climate cause changes in ocean surface temperatures, ocean circulation, continental water balance, vegetation, and landsurface albedo, which in turn cause additional feedbacks in the ...
متن کاملThe last deglaciation of the southeastern sector of the Scandinavian ice sheet.
The Scandinavian Ice Sheet (SIS) was an important component of the global ice sheet system during the last glaciation, but the timing of its growth to or retreat from its maximum extent remains poorly known. We used 115 cosmogenic beryllium-10 ages and 70 radiocarbon ages to constrain the timing of three substantial ice-margin fluctuations of the SIS between 25,000 and 12,000 years before the p...
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