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Greenland: Reanalysis of the Energy Budget of the Ice Sheet (GREBIS)
Atmospheric reanalyses have proven to be useful tools for synthesizing diverse and irregularly spaced atmospheric observations into internally consistent gridded data sets. Global reanalyses, as prepared by NCEP and ECMWF, provide complete global coverage, but are limited by relatively coarse resolution and by models which may not capture all of the important physical processes acting in a particular region. We propose to conduct a short-duration reanalysis (5 years) of the atmospheric and surface state of the Greenland ice sheet using a high resolution limited area atmospheric model adapted to the polar regions. This reanalysis will be conducted using a horizontal resolution (20 km) that is one order of magnitude greater than global reanalyses and will utilize polar specific observational datasets including the PARCA Greenland Climate Network (GC-Net) automatic weather station (AWS) array and NOAA/NASA Polar Pathfinder satellite derived products. The quality of the reanalysis will be evaluated using unassimilated observational data such as satellite derived cloud cover, radiative fluxes, and snow melt.
The gridded Greenland atmospheric reanalysis will serve as a high resolution atmospheric data set for additional studies of the Greenland ice sheet / atmosphere system. The specific objectives of this research are to:
This research is supported by the National Aeronautics and Space Administration.