Characteristic features of recent abrupt changes in winter circulation revealed by a general circulation model

Kunihiko Kodera, Masato Sugi, Ryuichi Kawamura, Hiroshi Koide

研究成果: ジャーナルへの寄稿記事

抄録

Two noticeable abrupt changes in Northern Hemispheric winter circulation have occurred in recent decades, one around 1977 and the other around 1989. In the 1970s occurrence, changes in equatorial sea surface temperatures (SSTs) occurred concurrently with those in mid-latitude atmospheric circulation. In the case of the late 1980s, however, no important variation in SSTs was seen in the equatorial regions. In order to identify the differences in the characteristics of the changes in circulation between the two cases, observed 500 hPa heights were compared to simulations with an atmospheric general circulation model (GCM) that used observed SSTs as surface boundary conditions. The results of simulation suggest that the change in circulation in the late 1980s was not the direct response to the changes in SSTs, but can rather be characterized as a triggered planetary scale internal mode of variability in the winter atmosphere.

元の言語英語
ページ(範囲)139-144
ページ数6
ジャーナルJournal of the Meteorological Society of Japan
76
発行部数1
DOI
出版物ステータス出版済み - 1 1 1998
外部発表Yes

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general circulation model
sea surface temperature
winter
atmospheric general circulation model
atmospheric circulation
simulation
boundary condition
atmosphere

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

これを引用

Characteristic features of recent abrupt changes in winter circulation revealed by a general circulation model. / Kodera, Kunihiko; Sugi, Masato; Kawamura, Ryuichi; Koide, Hiroshi.

:: Journal of the Meteorological Society of Japan, 巻 76, 番号 1, 01.01.1998, p. 139-144.

研究成果: ジャーナルへの寄稿記事

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