Reduction of weather effects in the calculation of sea-ice concentration with the DMSP SSM/I
作者： Donald J. Cavalieri , Karen M. St. Germain , Calvin T. Swift
DOI: 10.1017/S0022143000034791
关键词: Sea ice 、 Sea ice thickness 、 Line (formation) 、 Remote sensing 、 Filter (video) 、 Sea ice concentration 、 Microwave 、 Atmospheric sciences 、 Microwave radiometer 、 Polar 、 Geology
摘要: A problem in mapping the polar sea-ice covers both hemispheres has been sporadic false indication of sea ice over open ocean and at edge. These spurious concentrations result from variations sea-surface roughening by surface winds, atmospheric water vapor precipitating non-precipitating liquid water. This was addressed for derived Nimbus-7 scanning multi-channel microwave radiometer (SMMR) data through development a weather filter based on spectral information 18.0 37.0 GHz vertical polarization SMMR channels. Application similar use with concentration maps special-sensor imager (SSM/I) sensor is less successful. results position 19.35 SSM/I channels, which are closer to center 22.2 water-vapor line than Thus, channels more sensitive changes vapor, greater contamination problems. An additional developed, combination 22.2GHz. Examples effectiveness new presented limitations discussed.
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