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タイトル: A Global Determination of Cloud Microphysics with AVHRR Remote Sensing
著者: Kawamoto, Kazuaki
Nakajima, Teruyuki
Nakajima, Takashi Y.
発行日: 2001年5月1日
出版者: American Meteorological Society
掲載誌情報: Journal of Climate. Vol. 14, No. 9, 1 May 2001, pp. 2054-2068
抄録: An algorithm is developed for determining the cloud optical thickness and effective particle radius simultaneously on a global scale using Advanced Very High Resolution Radiometer (AVHRR) multispectral radiance data. In the algorithm, the treatment of thermal radiation in Nakajima and Nakajima is improved by reformulating the thermal emission in the atmospheric layers. At the same time, the lookup table for thermal emission is parameterized in terms of the equivalent water vapor path in order to include the effect of various vertical water vapor profiles. The algorithm is applied to AVHRR radiance data corresponding to reported aircraft and balloon measurements of cloud microphysical parameters. A comparison shows a good agreement between in situ and satellite-retrieved values thus obtained. The algorithm is further applied to 4-month Global Area Coverage data of 1987 to generate global distributions of the cloud optical thickness and effective particle radius for every 0.5° × 0.5° box in a -60°-60° latitudinal region. Similarities and differences in the global features of the effective particle radius and the optical thickness are found as compared with the previous studies.
URI: http://hdl.handle.net/2261/51875
ISSN: 08948755
出現カテゴリ:014 自然科学
1391010 学術雑誌


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