Title :
Estimating snow accumulation on Greenland from SSM/I radiometer data
Author :
Pack, Jed D. ; Jensen, Michael A.
Author_Institution :
Center for Earth Remote Sensing, Brigham Young Univ., Provo, UT, USA
Abstract :
This paper discusses a new method for determining snow accumulation on the Greenland ice sheet using passive radiometer data. The algorithm exploits high spatial correlation observed in brightness temperatures for adjacent pixels from SSM/I data to iteratively remove the effect of surface temperature and emissivity variation. This processed data reveals an exponential change in brightness temperature with time, with the time constant of this exponential proportional to the accumulation rate. Representative accumulation rates obtained using the method are shown to agree well with existing accumulation maps
Keywords :
hydrological techniques; millimetre wave measurement; radiometry; remote sensing; snow; Greenland; SSM/I radiometer data; brightness temperatures; emissivity variation; ice sheet; passive radiometer data; remote sensing; snow accumulation; spatial correlation; surface temperature; Backscatter; Brightness temperature; Earth; Ice; Iterative algorithms; Radar cross section; Radar scattering; Radiometry; Remote sensing; Snow;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2001. IGARSS '01. IEEE 2001 International
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-7031-7
DOI :
10.1109/IGARSS.2001.976689
