气候变化领域集成服务门户(CCPortal): On the varying responses of east asian winter monsoon to three types of El Niño: Observations and model hindcasts

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DOI	10.1175/JCLI-D-20-0784.1
	On the varying responses of east asian winter monsoon to three types of El Niño: Observations and model hindcasts
	Kim J.-W.; Chang T.-H.; Lee C.-T.; Yu J.-Y.
发表日期	2021
ISSN	08948755
起始页码	4089
结束页码	4101
卷号	34 期号:10
英文摘要	Using observational data and model hindcasts produced by a coupled climate model, we examine the response of the East Asian winter monsoon (EAWM) to three types of El Niño: eastern Pacific (EP) and central Pacific I (CP-I) and II (CP-II) El Niños. The observational analysis shows that all three El Niño types weaken the EAWM with varying degrees of impact. The EP El Niño has the largest weakening effect, while the CP-II El Niño has the second largest, and the CP-I El Niño has the smallest. We find that diverse El Niño types impact the EAWM by altering the responses of two anomalous anticyclones during El Niño mature winter: the western North Pacific anticyclone (WNPAC) and Kuroshio anticyclone (KAC). The WNPAC responses are controlled by the Gill response and Indian Ocean warming processes that both respond to the eastern-to-central tropical Pacific precipitation anomalies. The KAC responses are controlled by a poleward wave propagation responding to the northwestern tropical Pacific precipitation anomalies. We find that the model hindcasts significantly underestimate the weakening effect during the EP and CP-II El Niños. These underestimations are related to a model deficiency in which it produces a too-weak WNPAC response during the EP El Niño and completely misses the KAC response during both types of El Niño. The too-weak WNPAC response is caused by the model deficiency of simulating too-weak eastern-to-central tropical Pacific precipitation anomalies. The lack of KAC response arises from the unrealistic response of the model’s extratropical atmosphere to the northwestern tropical Pacific precipitation anomalies. © 2021 American Meteorological Society.
英文关键词	Asia; Atmosphere-ocean interaction; El Niño; Interannual variability; Model output statistics; Pacific Ocean
语种	英语
scopus关键词	Atmospheric pressure; Atmospheric thermodynamics; Climate models; Ocean currents; Tropics; Wave propagation; Coupled climate model; East Asian winter monsoon; Eastern pacific; Observational analysis; Observational data; Precipitation anomalies; Weakening effect; Western North Pacific; Nickel compounds
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178578
作者单位	Department of Earth System Science, University of California, Irvine, CA, United States; Central Weather Bureau, Taipei, Taiwan
推荐引用方式 GB/T 7714	Kim J.-W.,Chang T.-H.,Lee C.-T.,et al. On the varying responses of east asian winter monsoon to three types of El Niño: Observations and model hindcasts[J],2021,34(10).
APA	Kim J.-W.,Chang T.-H.,Lee C.-T.,&Yu J.-Y..(2021).On the varying responses of east asian winter monsoon to three types of El Niño: Observations and model hindcasts.Journal of Climate,34(10).
MLA	Kim J.-W.,et al."On the varying responses of east asian winter monsoon to three types of El Niño: Observations and model hindcasts".Journal of Climate 34.10(2021).