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  1. 139 大気海洋研究所
  2. 10 気候システム研究系
  3. 1391010 学術雑誌
  1. 0 資料タイプ別
  2. 10 学術雑誌論文
  3. 014 自然科学

Physical properties of maritime low clouds as retrieved by combined use of Tropical Rainfall Measurement Mission Microwave Imager and Visible/Infrared Scanner : Algorithm

http://hdl.handle.net/2261/51882
http://hdl.handle.net/2261/51882
96cf0b13-efeb-4d03-9fb5-723995c3b88e
名前 / ファイル ライセンス アクション
Nakajima2002JGRA_H24P74.pdf Nakajima2002JGRA_H24P74.pdf (4.3 MB)
Item type 学術雑誌論文 / Journal Article(1)
公開日 2017-01-10
タイトル
タイトル Physical properties of maritime low clouds as retrieved by combined use of Tropical Rainfall Measurement Mission Microwave Imager and Visible/Infrared Scanner : Algorithm
言語
言語 eng
キーワード
主題Scheme Other
主題 low clouds
キーワード
主題Scheme Other
主題 effective radius
キーワード
主題Scheme Other
主題 algorithm
キーワード
主題Scheme Other
主題 TRMM
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Masunaga, Hirohiko

× Masunaga, Hirohiko

WEKO 3441

Masunaga, Hirohiko

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Nakajima, Takashi Y.

× Nakajima, Takashi Y.

WEKO 3442

Nakajima, Takashi Y.

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Nakajima, Teruyuki

× Nakajima, Teruyuki

WEKO 3443

Nakajima, Teruyuki

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Kachi, Misako

× Kachi, Misako

WEKO 3444

Kachi, Misako

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Oki, Riko

× Oki, Riko

WEKO 3445

Oki, Riko

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Kuroda, Shunsuke

× Kuroda, Shunsuke

WEKO 3446

Kuroda, Shunsuke

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著者所属
著者所属 Earth Observation Research Center, National Space Development Agency
著者所属
著者所属 Center for Climate System Research, University of Tokyo
抄録
内容記述タイプ Abstract
内容記述 Satellite remote sensing studies on the microphysical and optical properties of clouds have constructed an active research field in the last decades. Clouds are observed over a wide spectral range from the visible/infrared to the microwave, and either shortwave or microwave measurement is used to evaluate the liquid water path (LWP). On the other hand, to date, there have been few cloud studies based on combined measurement by a visible/infrared imager and a microwave radiometer aboard the same platform. In this paper a physical inversion algorithm for the combined use of visible/infrared and microwave sensors is proposed to retrieve the cloud physical quantities such as LWP and the effective droplet radius, each of which is determined in two different ways. The current version of the algorithm has been developed for application to the Tropical Rainfall Measurement Mission (TRMM) sensors, i.e., Visible and Infrared Scanner (VIRS) and TRMM Microwave Imager (TMI). The cloud top temperature obtained from the VIRS analysis is used as an input to the TMI analysis to reduce uncertainties in estimation of LWP. Total errors in LWP are estimated to range from 11 to 30 g/m2. In the algorithm the beam-filling efficiency of clouds for TMI footprints is corrected by the cloud fraction evaluated from the VIRS measurements. For application, global analysis is performed with 3-monthly data from January to March 2000. The scatter diagram of the shortwave-retrieved LWP (LWPshrt) versus the microwave-retrieved LWP (LWPmicr) shows characteristic trends for both precipitating and nonprecipitating clouds. Vertical inhomogeneity of the cloud droplet size accounts for small excess of LWPshrt over LWPmicr for nonprecipitating clouds, while precipitating clouds produce LWPmicr larger than LWPshrt, owing to the presence of raindrops. These tendencies are reinforced by examination of the global distributions of the shortwave-retrieved droplet radius Re(NV) and the microwave counterpart defined by LWP divided by the cloud optical thickness Re(MV). The result implies that difference in those effective radii reflects a microphysical mechanism to expedite or suppress the conversion of the cloud water into rainfall.
書誌情報 Journal of geophysical research. D

巻 107, 号 D10, p. 4083, 発行日 2002-05-22
ISSN
収録物識別子タイプ ISSN
収録物識別子 01480227
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AA10819765
DOI
識別子タイプ DOI
関連識別子 info:doi/10.1029/2001JD000743
権利
権利情報 Copyright 2002 by the American Geophysical Union.
日本十進分類法
主題Scheme NDC
主題 451
出版者
出版者 American Geophysical Union
異版である
関連タイプ isVersionOf
識別子タイプ URI
関連識別子 http://doi.org/10.1029/2001JD000743
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