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Homogenized Water Vapor Absorption Band Radiances From International Geostationary Satellites
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2019
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Source: Geophysical Research Letters, 46, 10599– 10608
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Journal Title:Geophysical Research Letters
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Description:In the past 20+ years, GEO Imagers with infrared 6.5-μm bands have been observing the Earth's atmosphere, providing useful information of upper tropospheric moisture. Due to the instrumental differences and local viewing angles in GEO satellites, these observations are not consistent for generating climate data records (CDRs). In this study, a methodology has been developed to homogenize the 6.5-μm radiances from the international GEO satellites, to generate a consistent CDR. Validations with Infrared Atmospheric Sounding Interferometer radiances from Metops for 2015–2017 for seven GEO Imager sensors show that the GEO radiances are homogenized well with small standard deviation and biases of the differences (smaller for newer sensors), temporally stable radiometric accuracy, and weak angle dependency (even weaker for sensors with two water vapor bands). The homogenized 20+ years of consistent 6.5-μm radiance CDR can be used to evaluate reanalysis and climate models, especially the diurnal variation of the model simulation.
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Source:Geophysical Research Letters, 46, 10599– 10608
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Rights Information:Other
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Compliance:Submitted
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