Estimating Greenland surface melt is hampered by melt induced dampening of temperature variability
نویسندگان
چکیده
منابع مشابه
Surface melt-induced acceleration of Greenland ice-sheet flow.
Ice flow at a location in the equilibrium zone of the west-central Greenland Ice Sheet accelerates above the midwinter average rate during periods of summer melting. The near coincidence of the ice acceleration with the duration of surface melting, followed by deceleration after the melting ceases, indicates that glacial sliding is enhanced by rapid migration of surface meltwater to the ice-bed...
متن کاملGreenland ice sheet melt from MODIS and associated atmospheric variability
Daily June-July melt fraction variations over the Greenland ice sheet (GIS) derived from the Moderate Resolution Imaging Spectroradiometer (MODIS) (2000-2013) are associated with atmospheric blocking forming an omega-shape ridge over the GIS at 500 hPa height. Blocking activity with a range of time scales, from synoptic waves breaking poleward (<5 days) to full-fledged blocks (≥5 days), brings ...
متن کاملSeasonal to interannual variability in Antarctic sea-ice surface melt
Satellite remote sensing time-series images are used to illustrate the spatial and temporal variability in Antarctic-wide seaice surface melting during the austral summer. Combinations of collocated data from the Active Microwave Instrument on board the ERS-1/2 spacecraft, RadarSat Synthetic Aperture Radar (SAR) and SSM/I passive microwave radiometer are used in characterization of the effects ...
متن کاملInvestigating the local-scale influence of sea ice on Greenland surface melt
Rapid decline in Arctic sea ice cover in the 21st century may have wide-reaching effects on the Arctic climate system, including the Greenland ice sheet mass balance. Here, we investigate whether local changes in sea ice around the Greenland ice sheet have had an impact on Greenland surface melt. Specifically, we investigate the relationship between sea ice concentration, the timing of melt ons...
متن کاملDiagnosing the extreme surface melt event over southwestern Greenland in 2007
Analysis of passive microwave brightness temperatures from the space-borne Special Sensor Microwave Imager (SSM/I) documents a record surface snowmelt over high elevations (above 2000 m) of the Greenland ice sheet during summer of 2007. To interpret this record, results from the SSM/I are examined in conjunction with fields from the National Centers for Environmental Prediction/National Center ...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 2018
ISSN: 0022-1430,1727-5652
DOI: 10.1017/jog.2018.10