Moisture Circulation over East Asian during el Nino Episode in Northern Winter, Spring and Autumn

• ZHANG Renhe

  Chinese Academy of Meteorological Sciences, Beijing

• SUMI Akimasa

  Center for Climate System Research, University of Tokyo

書誌事項

タイトル別名

• Moisture Circulation over East Asia during El Nino Episode in Northern Winter, Spring and Autumn.
• Moisture circulation over East Asia during El Niño episode in northern winter, spring and autumn

抄録

Diagnostic analysis is made to investigate features of the moisture circulation over East Asian during the El Niño episode in northern winter, spring and autumn. It is found that in all these seasons, the anomalies of precipitation in China, atmospheric precipitable water, water vapor transport and moisture divergence over East Asia in the El Niño mature phase, differ from those in the rest of the phases. In the El Niño mature phase, positive precipitation anomalies occur in the southern part of China. More northeastward water vapor transport appears around the southeastern coast of East Asia, where moisture converges, and precipitable water is above normal, which are consistent with the precipitation anomalies.<br> The physical process through which El Ninñ affects the East Asian climate, is also identified. Differing from the rest of the phases in the El Niño episode, the mature phase is characterized by strong convective cooling anomalies in the atmosphere, in the area (0-15°N, 110°E-150°E) over the western tropical Pacific. As a Rossby wave response of the tropical atmosphere to the cooling anomalies, an anomalous low-level anticyclone forms to the north of the maritime continent. This anticyclonic anomaly not only transports more water vapor to the area around the southeastern coast of East Asia, but also strengthens the western Pacific subtropical high, and shifts it to the south of the mainland China, which are favorable for more precipitation in the southern part of China.<br>

収録刊行物

• 気象集誌. 第2輯

  気象集誌. 第2輯 80 (2), 213-227, 2002

  公益社団法人 日本気象学会

キーワード

• Atmospheric Science

詳細情報

• CRID: 1390282681478102272
• NII論文ID: 110001807731
• NII論文ID: 130004434684
• NII書誌ID: AA00702524
• DOI: 10.2151/jmsj.80.213
• ISSN: 21869057
• ISSN: 00261165
• NDL書誌ID: 6154798
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6154798
• Web Site: http://www.jstage.jst.go.jp/article/jmsj/80/2/80_2_213/_pdf
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10611982
• 本文言語コード: en
• データソース種別:
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