ATMOSPHERIC WATER-VAPOR OVER OCEANS FROM SSM/I MEASUREMENTS

被引:119
作者
SCHLUESSEL, P
EMERY, WJ
机构
[1] GKSS FORSCHUNGSZENTRUM GEESTHACHT GMBH,GEESTHACHT,GERMANY
[2] UNIV COLORADO,COLORADO CTR ASTRODYNAM RES,BOULDER,CO 80309
基金
美国国家科学基金会; 美国国家航空航天局;
关键词
D O I
10.1080/01431169008955055
中图分类号
TP7 [遥感技术];
学科分类号
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要
The Special Sensor Microwave/Imager (SSM/I) flying on the most recent satellite of the Defense Meteorological Satellite Program (DMSP) measures radiation from the Earth-atmosphere system within millimetre wavelengths. This radiation is strongly modified by the varying atmospheric water-vapour content. A technique to derive the water-vapour content over oceans from these measurements is developed. The sensor system is studied theoretically by calculating the radiative transfer for a non-scattering atmosphere in the appropriate spectral channels for a large set of atmospheric/oceanic situations. Subsequently, statistical retrieval coefficients are derived via a regression analysis of the synthetic measurements. Approaches using one to three spectral channels enable us to derive water vapour amounts in vertical columns with accuracies from 0.145 to 0.17g/cm2. A case study with real SSM/I data demonstrates the capability of the system to derive atmospheric water-vapour fields over the global ocean within a period of a few days. The accuracy evaluated is confirmed through globally distributed match-ups with radiosonde measurements. © 1990 Taylor and Francis Ltd.
引用
收藏
页码:753 / 766
页数:14
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