Proposal Summary Title: Variability of Accumulation, Ice-Sheet Elevation, and Mass Balance at Regional Spatial Scales
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چکیده
منابع مشابه
Elevation change of the Greenland Ice Sheet due to surface mass balance and firn processes, 1960–2014
Observed changes in the surface elevation of the Greenland Ice Sheet are caused by ice dynamics, basal elevation change, basal melt, surface mass balance (SMB) variability, and by compaction of the overlying firn. The last two contributions are quantified here using a firn model that includes compaction, meltwater percolation, and refreezing. The model is forced with surface mass fluxes and tem...
متن کاملGreenland ice sheet surface mass balance 1991–2000: Application of Polar MM5 mesoscale model and in situ data
[1] The Polar Pennsylvania State University–National Center for Atmospheric Research Fifth-Generation Mesoscale Model (Polar MM5) regional climate model was run over the North Atlantic region for 1991–2000. We analyze 24-km output over the Greenland ice sheet to evaluate spatial and temporal variability of the surface mass balance and its subcomponents. The model output is compared with 3 years...
متن کاملGround-based Measurements of Spatial and Temporal Variability of Snow Accumulation in East Antarctica
[1] The East Antarctic Ice Sheet is the largest, highest, coldest, driest, and windiest ice sheet on Earth. Understanding of the surface mass balance (SMB) of Antarctica is necessary to determine the present state of the ice sheet, to make predictions of its potential contribution to sea level rise, and to determine its past history for paleoclimatic reconstructions. However, SMB values are poo...
متن کاملInterannual variability in net accumulation on the Greenland Ice Sheet Observations and implications for mass balance measurements
Nine 24-year accumulation records from the Summit region in central Greenland are analyzed to separate the effects of spatial noise and interannual f uctuations on the variability in each core. The study shows that both processes are equally important, with standard eviations of 25 mm water equivalent per year and 24 mm water equivalent per year, respectively. A comparison with estimates of sur...
متن کاملEvaluation of Greenland Ice Sheet Surface Climate in the HIRHAM Regional Climate Model Using Automatic Weather Station Data
The 1998 annual cycle and 1991–98 summer simulations of Greenland ice sheet surface climate are made with the 0.58-horizontal resolution HIRHAM regional climate model of the Arctic. The model output is compared with meteorological and energy balance observations from 15 Greenland Climate Network automatic weather stations. The model reproduces the monthly average surface climate parameters, to ...
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