globalchange  > 气候减缓与适应
DOI: 10.1002/joc.5373
论文题名:
Responses and mechanisms of East Asian winter and summer monsoons to weakened Atlantic meridional overturning circulation using the FGOALS-g2 model
作者: Yu T.; Cheng J.; Lin P.; Yu Y.; Guo P.
刊名: International Journal of Climatology
ISSN: 8998418
出版年: 2018
卷: 38, 期:5
起始页码: 2618
结束页码: 2626
语种: 英语
英文关键词: Atlantic meridional overturning circulation ; East Asian monsoon ; FGOALS-g2 ; freshwater hosing experiment
Scopus关键词: Sea level ; Water ; Atlantic meridional overturning circulations ; Cyclonic circulation ; East Asian monsoon ; East Asian summer monsoon ; East Asian winter monsoon ; FGOALS-g2 ; Sea level pressure ; Western North Pacific ; Atmospheric thermodynamics ; Philippia
英文摘要: This study investigates the responses and mechanisms of East Asian winter monsoon (EAWM) and East Asian summer monsoon (EASM) to weakened Atlantic meridional overturning circulation (AMOC) through three perturbation experiments with different intensities of freshwater hosing in the North Atlantic, using the Flexible Global Ocean – Atmosphere – Land System Model, Grid-point Version 2. These experiments show that a subtle weakening of AMOC does not significantly influence either the EAWM or the EASM. When AMOC weakens more substantially, northerly wind anomalies emerge in East Asia throughout the year, strengthening the EAWM and weakening the EASM. The northerly wind anomalies result from an anomalous westward sea level pressure (SLP) gradient, namely positive SLP anomalies across Eurasia and negative anomalies in the western North Pacific (WNP). In winter, negative WNP SLP anomalies are found in mid-high latitudes. They are caused by anomalous stationary wave activity, which is associated with the Aleutian Iceland seesaw teleconnection. In summer, negative WNP SLP anomalies are present in the subtropics, and are linked with an anomalous cyclonic circulation over the north of the Philippian Sea. This cyclonic circulation anomaly is induced by the anomalous warm water in the subsurface of the South China Sea and Philippian Sea through the Gill mechanism. © 2017 Royal Meteorological Society
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/116946
Appears in Collections:气候减缓与适应

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作者单位: Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory of Meteorological Disaster of Ministry of Education, Climate Dynamics Research Center, Nanjing University of Information Science & Technology, China; College of Earth Science, University of Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China

Recommended Citation:
Yu T.,Cheng J.,Lin P.,et al. Responses and mechanisms of East Asian winter and summer monsoons to weakened Atlantic meridional overturning circulation using the FGOALS-g2 model[J]. International Journal of Climatology,2018-01-01,38(5)
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