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Difference in seasonal variation of net precipitation between the Arctic and Antarctic regions

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タイトル: Difference in seasonal variation of net precipitation between the Arctic and Antarctic regions
著者: Oshima, Kazuhiro 著作を一覧する
Yamazaki, Koji 著作を一覧する
発行日: 2006年 9月22日
出版者: American Geophysical Union
誌名: Geophysical Research Letters
巻: 33
号: L18501
出版社 DOI: 10.1029/2006GL027389
抄録: The difference in the climatological seasonal variation of the net precipitation (precipitation minus evaporation) between the Arctic and the Antarctic was evaluated using ECMWF reanalysis data. Evaluated for simplified polar caps (the regions poleward of 70°N and 67.5°S), over the Arctic, the net precipitation is large in the boreal summer, while over the Antarctic, it is large in the austral winter. The net precipitation depends strongly on the poleward transient moisture flux into the region, which is affected by both the meridional moisture gradient and eddy activity. Thus, the seasonal variation of the poleward transient moisture flux is determined by the relative amplitude of the moisture and eddy factors, that is, by the ratio of the amplitude of the seasonal variation to the annual mean. While both regions have similar relative amplitudes of the eddy factor, the moisture factor in the Arctic is much larger than in the Antarctic. The moisture factor explains the difference in the seasonal variation of the net precipitation.
Rights: An edited version of this paper was published by AGU; Copyright 2006, American Geophysical Union, GEOPHYSICAL RESEARCH LETTERS, VOL. 33, L18501
Relation (URI): http://www.agu.org/journals/gl/
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/14779
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 山崎 孝治

 

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