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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

A study of long-term trends in mineral dust aerosol distributions in Asia using a general circulation model

http://hdl.handle.net/2261/51888
http://hdl.handle.net/2261/51888
9b810d33-b434-4a06-a369-af2455921e73
名前 / ファイル ライセンス アクション
Nakajima2004JGRA_H24P100.pdf Nakajima2004JGRA_H24P100.pdf (5.5 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 A study of long-term trends in mineral dust aerosol distributions in Asia using a general circulation model
言語
言語 eng
キーワード
主題Scheme Other
主題 dust
キーワード
主題Scheme Other
主題 Asia
キーワード
主題Scheme Other
主題 aerosol
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ journal article
著者 Mukai, Makiko

× Mukai, Makiko

WEKO 3485

Mukai, Makiko

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Nakajima, Teruyuki

× Nakajima, Teruyuki

WEKO 3486

Nakajima, Teruyuki

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Takemura, Toshihiko

× Takemura, Toshihiko

WEKO 3487

Takemura, Toshihiko

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著者所属
著者所属 Center for Climate System Research, University of Tokyo
著者所属
著者所属 Research Institute for Applied Mechanics, Kyushu University
抄録
内容記述タイプ Abstract
内容記述 Dust events have been observed in Japan with high frequency since 2000. On the other hand, the frequency of dust storms is said to have decreased in the desert regions of China since about the middle of the 1970s. This study simulates dust storms and transportation of mineral dust aerosols in the east Asia region from 1981 to 2001 using an aerosol transport model, Spectral Radiation-Transport Model for Aerosol Species (SPRINTARS), implemented in the Center for Climate System Research/National Institute for Environmental Studies atmospheric global circulation model, in order to investigate the main factors that control a dust event and its long-term variation. The model was forced to simulate a real atmospheric condition by a nudging technique using European Centre for Medium-Range Weather Forecasts reanalysis data on wind velocities, temperature, specific humidity, soil wetness, and snow depth. From a comparison between the long-term change in the dust emission and model parameters, it is found that the wind speed near the surface level had a significant influence on the dust emission, and snow is also an important factor in the early spring dust emission. The simulated results suggested that dust emissions from northeast China have a great impact on dust mass concentration in downwind regions, such as the cities of northeastern China, Korea, and Japan. When the frequency of dust events was high in Japan, a low-pressure system tended to develop over the northeast China region that caused strong winds. From 2000 to 2001 the simulated dust emission flux decreased in the Taklimakan desert and the northwestern part of China, while it increased in the Gobi desert and the northeastern part of China. Consequently, dust particles seem to be transported more from the latter region by prevailing westerlies in the springtime to downwind areas as actually observed. In spite of the similarity, however, there is still a large disagreement between observed and simulated dust frequencies and concentrations. A more realistic land surface and uplift mechanism of dust particles should be modeled to improve the model simulation. Desertification of the northeastern China region may be another reason for this disagreement.
書誌情報 Journal of geophysical research. D

巻 109, 号 19, p. D19204, 発行日 2004-10-09
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/10.1029/2003JD004270
権利
権利情報 Copyright 2004 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/10.1029/2003JD004270
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