[en] 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 for Atmospheric Research reanalysis and output from a regional climate model. The record surface melt reflects unusually warm conditions, seen in positive summertime anomalies of surface air temperatures, downwelling longwave radiation, 1000–500 hPa atmospheric thickness, and the net surface energy flux, linked in turn to southerly airflow over the ice sheet. Low snow accumulation may have contributed to the record through promoting anomalously low surface albedo.
Disciplines :
Sciences de la terre & géographie physique
Auteur, co-auteur :
Tedesco, Marco; City College of New York, City University of New York, New York, USA
Serreze, Marc; Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, USA
Fettweis, Xavier ; Université de Liège - ULiège > Département de géographie > Topoclimatologie
Langue du document :
Anglais
Titre :
Diagnosing the extreme surface melt event over southwestern Greenland in 2007
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