C360 Satellite retrievals from inhomogeneous clouds

概要

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The accuracy of the retrieved Cloud optical depth (COD) of the geostationary meteorological satellite (GMS-5) during the month of April 2001 is examined through a comparison with MODIS data, prior to their usage for global radiation budget calculations. The study area is located in the East-China Sea region. The comparison shows the existence of a certain number of differences between the two sets of COD data. GMS-5 data appear so often lower. These differences seem to be more remarkable in high and thick cloud areas. And, these areas are mostly composed of cumulonimbus clouds. Substantial errors may arise in the retrieval techniques used for these types of complex cloud fields. Such errors may be caused by three-dimensional radiative effects. These effects are not generally accounted for in the retrieval algorithms, as the latter are set on the basis of an independent pixel approximation.
社団法人日本気象学会の論文
2005-10-31