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Meteorological and Radiative Factors Influencing Greenland Ice Sheet Melt During 2012 and 2019.

Authors: Shayne O'Brien*, Texas State University, Thomas Ballinger, University of Alaska Fairbanks, Thomas Mote, University of Georgia, Marco Tedesco, Columbia University, Dirk van As, Geological Survey of Denmark and Greenland
Topics: Cryosphere, Climatology and Meteorology
Keywords: Greenland, Cryosphere, Climate Change, Ice Sheet
Session Type: Poster
Presentation File: No File Uploaded


In terms of surface mass balance (SMB) loss on the Greenland Ice Sheet (GrIS), both 2012 and 2019 stand out as years with strong mass balance loss in comparison the rest of the 2010's. Using in-situ data from 16 automatic weather stations along 8 transects on the GrIS from the Programme for Monitoring of the Greenland Ice Sheet (PROMICE) network, coupled with 25km x 25km gridded brightness temperature data from a combined Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) and the Defense Meteorological Satellite Program (DMSP) Special Sensor Microwave Imager (SSM/I) dataset, discrepancies were identified in events where satellite data indicates surface melt, but in-situ data does not, and vice-versa. These discrepancies have warranted further study into the meteorological and radiative factors that drive melt, such as Greenland Blocking Index (GBI), net shortwave, net longwave, specific humidity and cloud cover to elucidate the causes of the data discrepancy, while providing further insight into strong drivers of melt during the selected years.

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