globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-014-2141-5
Scopus记录号: 2-s2.0-84939875163
论文题名:
Modulation of the Pacific Decadal Oscillation on the summer precipitation over East China: a comparison of observations to 600-years control run of Bergen Climate Model
作者: Yu L.; Furevik T.; Otterå O.H.; Gao Y.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 44, 期:2017-01-02
起始页码: 475
结束页码: 494
语种: 英语
英文关键词: Pacific Decadal Oscillation ; Sea surface temperature anomalies ; Summer precipitation pattern ; Western Pacific subtropical high
英文摘要: Observations show that the summer precipitation over East China often goes through decadal variations of opposite sign over North China and the Yangtze River valley (YRV), such as the “southern flood and northern drought” pattern that occurred during the late 1970s–1990s. In this study it is shown that a modulation of the Pacific Decadal Oscillation (PDO) on the summer precipitation pattern over East China during the last century is partly responsible for this characteristic precipitation pattern. During positive PDO phases, the warm winter sea surface temperatures (SSTs) in the eastern subtropical Pacific along the western coast of North American propagate to the tropics in the following summer due to weakened oceanic meridional circulation and the existence of a coupled wind–evaporation–SST feedback mechanism, resulting in a warming in the eastern tropical Pacific Ocean (5°N–20°N, 160°W–120°W) in summer. This in turn causes a zonal anomalous circulation over the subtropical–tropical Pacific Ocean that induces a strengthened western Pacific subtropical high (WPSH) and thus more moisture over the YRV region. The end result of these events is that the summer precipitation is increased over the YRV region while it is decreased over North China. The suggested mechanism is found both in the observations and in a 600-years fully coupled pre-industrial multi-century control simulations with Bergen Climate Model. The intensification of the WPSH due to the warming in the eastern tropical Pacific Ocean was also examined in idealized SSTA-forced AGCM experiments. © 2014, The Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54416
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作者单位: Geophysical Institute, University of Bergen, Bergen, Norway; Uni Climate, Uni Research, Bergen, Norway; Nansen Environmental and Remote Sensing Center, Bergen, Norway; Climate Changes Research Center, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Bjerknes Centre for Climate Research, Bergen, Norway

Recommended Citation:
Yu L.,Furevik T.,Otterå O.H.,et al. Modulation of the Pacific Decadal Oscillation on the summer precipitation over East China: a comparison of observations to 600-years control run of Bergen Climate Model[J]. Climate Dynamics,2014-01-01,44(2017-01-02)
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