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Proceedings Paper

Cloud growth process appeared in the global scale distribution of the cloud optical and microphysical properties retrieved from the satellite remote sensing
Author(s): Takashi Y. Nakajima; Kentaroh Suzuki; Toshihiko Takemura; Teruyuki Nakajima
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Paper Abstract

The spatial distributions and temporal variations of the cloud properties, optical thickness (τc) and effective particle radius (re) are important observation targets to understand the role of clouds in the radiation budget estimations, especially in the cloud-aerosol interaction studies, because they will have information of cloud growth at the certain area. Thus, the wide-area and high-temporal observations of the cloud properties are necessary. We used MODIS 5-km sub-sampling radiance subsets (MOD02SSH) for the global scale retrievals of clouds. The MOD02SSH conserves scene texture and has moderately reduced data volume of 1/25 from original size of MODIS scene, so that they will be suitable for the more precise estimations of τc and re over synoptic to global scale. We retrieved τc and re from one-month MOD02SSH over the global region in July 2006 by using a cloud retrieval algorithm of CAPCOM developed by Nakajima and Nakajima (1995) with an extension by Kawamoto et al. (2001). In the obtained τc versus re scatter plots at every 5 x 5 degrees grid boxes, we found typical features of the τc versus re scatter patterns in the middle part of the Pacific and Indian oceans, Eastern Europe and Asia, and the west coast of the North and South America. Such patterns will be explained by the spectral microphysics cloud model developed by Suzuki et al. (2006), as the cloud properties under the pristine, turbid, and mixture aerosol environments. The aerosol transport model SPRINTARS developed by Takemura et al. (2005) simulated that the Eastern Europe and Asia covered by dense aerosols in the period.

Paper Details

Date Published: 8 December 2008
PDF: 9 pages
Proc. SPIE 7152, Remote Sensing of the Atmosphere and Clouds II, 715205 (8 December 2008); doi: 10.1117/12.804941
Show Author Affiliations
Takashi Y. Nakajima, Tokai Univ. (Japan)
Kentaroh Suzuki, Colorado State Univ. (United States)
Toshihiko Takemura, Kyushu Univ. (Japan)
Teruyuki Nakajima, Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 7152:
Remote Sensing of the Atmosphere and Clouds II
Graeme L. Stephens; Takashi Y. Nakajima, Editor(s)

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