Global maps of microwave land surface emissivities: Potential for land surface characterization
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作者:
Prigent, C
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Columbia Univ, NASA, Goddard Inst Space Studies, Ctr Climate Syst Res, New York, NY 10025 USAColumbia Univ, NASA, Goddard Inst Space Studies, Ctr Climate Syst Res, New York, NY 10025 USA
Prigent, C
[1
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Rossow, WB
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Columbia Univ, NASA, Goddard Inst Space Studies, Ctr Climate Syst Res, New York, NY 10025 USAColumbia Univ, NASA, Goddard Inst Space Studies, Ctr Climate Syst Res, New York, NY 10025 USA
Rossow, WB
[1
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Matthews, E
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Columbia Univ, NASA, Goddard Inst Space Studies, Ctr Climate Syst Res, New York, NY 10025 USAColumbia Univ, NASA, Goddard Inst Space Studies, Ctr Climate Syst Res, New York, NY 10025 USA
Matthews, E
[1
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机构:
[1] Columbia Univ, NASA, Goddard Inst Space Studies, Ctr Climate Syst Res, New York, NY 10025 USA
Microwave land surface emissivities are derived from special sensor microwave imager (SSM/I) observations. Cloud-free SSM/I observations are first isolated with the help of collocated visible/infrared satellite observations (International Satellite Cloud Climatology Project (ISCCP) data). Then, the cloud-free atmospheric contribution is calculated from an estimate of the local atmospheric temperature-humidity profile (National Centers for Environmental Prediction (NCEP) analyses). Finally, with the surface skin temperature derived from IR observations (ISCCP estimate), the surface emissivity is calculated for all the SSM/I channels. The method is applied to the SSM/I data for the globe for October 1991. Correspondences between geographical patterns of the emissivities and surface characteristics are briefly analyzed to investigate the potential of microwave emissivities to monitor vegetation phenology and surface properties at regional and continental scales.
机构:
CREST, The City College of New York, Steinman Hall, 140th Street and Convent Avenue, New York, NY 10031, United StatesCREST, The City College of New York, Steinman Hall, 140th Street and Convent Avenue, New York, NY 10031, United States
Shahroudi, Narges
Rossow, William
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机构:
CREST, The City College of New York, Steinman Hall, 140th Street and Convent Avenue, New York, NY 10031, United StatesCREST, The City College of New York, Steinman Hall, 140th Street and Convent Avenue, New York, NY 10031, United States
机构:
CREST at The City College of New York, Steinman Hall, 140th Street and Convent Avenue, New York,NY,10031, United StatesCREST at The City College of New York, Steinman Hall, 140th Street and Convent Avenue, New York,NY,10031, United States
Shahroudi, Narges
Rossow, William
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机构:
CREST at The City College of New York, Steinman Hall, 140th Street and Convent Avenue, New York,NY,10031, United StatesCREST at The City College of New York, Steinman Hall, 140th Street and Convent Avenue, New York,NY,10031, United States