Snowmelt on the Greenland Ice Sheet as Derived from Passive Microwave Satellite Data
نویسندگان
چکیده
منابع مشابه
Snowmelt detection over the Greenland ice sheet from SSM/I brightness temperature daily variations
[1] We propose a technique for monitoring snowmelt over the Greenland ice sheet between 1992 and 2005 based on the difference between ascending and descending brightness temperatures (DAV) measured either at 19.35or 37GHz by the Special Sensor Microwave Imager (SSM/I). Wet snow is detected when both brightness temperatures and DAV values exceed fixed thresholds. Differently from existing techni...
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Sea level rise related to the melting and thinning of the Greenland Ice Sheet (GrIS), a subject of growing concern in recent years, will eventually affect the global climate. Although the melting of snow on the GrIS is actively monitored by passive microwave remote sensing, very few studies have estimated the seasonal GrIS snow depth using this technique. In this study, to estimate seasonal sno...
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Areas of dark ice have appeared on the Greenland ice sheet every summer in recent years. These are likely to have a great impact on the mass balance of the ice sheet because of their low albedo. We report annual and geographical variations in the bare ice and dark ice areas that appeared on the Greenland Ice Sheet from 2000 to 2014 by using MODIS satellite images. The July monthly mean of the e...
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Numerical modeling based on radiative transfer theory and observations of grain growth with depth have indicated that passive microwave brightness temperatures over the polar ice sheets should be a function of accumulation rate. Using accumulationrate time series from nine shallow cores in the dry-snow facies in central Greenland, we find that multi-year averages of mean annual SMMR brightness ...
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Measuring microbial abundance in glacier ice and identifying its controls is essential for a better understanding and quantification of biogeochemical processes in glacial ecosystems. However, cell enumeration of glacier ice samples is challenging due to typically low cell numbers and the presence of interfering mineral particles. We quantified for the first time the abundance of microbial cell...
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ژورنال
عنوان ژورنال: Journal of Climate
سال: 1997
ISSN: 0894-8755,1520-0442
DOI: 10.1175/1520-0442(1997)010<0165:sotgis>2.0.co;2