气候变化领域集成服务门户(CCPortal): Was the North American extreme climate in winter 2013/14 a SST forced response?

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DOI	10.1007/s00382-018-4314-0
	Was the North American extreme climate in winter 2013/14 a SST forced response?
	Peng P.; Kumar A.; Chen M.; Hu Z.-Z.; Jha B.
发表日期	2019
ISSN	0930-7575
起始页码	3099
结束页码	3110
卷号	52 期号:2020-05-06
英文摘要	This study analyzed the possible causes of the atmospheric circulation anomalies responsible for the severe North American (NA) climate in the winter 2013/14. The seasonal (December-January-February) mean circulation anomalies, characterized by an extremely strong ridge off the west coast of NA and an intense trough over the continental US, appeared as a part of wave train across the North Pacific, NA and North Atlantic. The lack of heating-circulation response relationship in the tropics, however, suggested that the wave train might not be a direct response to tropical heating. Meanwhile, dramatic month-to-month variations of the atmospheric circulation over the northeastern Pacific excluded the possibility that the underlying sea surface temperature (SST) anomalies played a dominant role. A further examination of monthly mean circulation patterns suggests that the wave train was initiated by a heating–cooling dipole at the equatorial Pacific in December 2013, and subsequently, was maintained and modified by the extratropical atmospheric internal dynamics in following months. The evolution of tropical heating from December 2013 to February 2014 was associated with the Madden Julian Oscillation (MJO), instead of a quasi-steady response to underlying SST anomalies. Some features of the circulation anomalies in the extratropics for the season can be captured by an atmospheric general circulation model (AGCM) forced with observed SST, but a lack of persistent heating-circulation response relationship in the tropics implied a crucial role of internal variability to extreme NA climate anomalies in the winter 2013/14. © 2018, This is a U.S. government work and its text is not subject to copyright protection in the United States; however, its text may be subject to foreign copyright protection.
语种	英语
scopus关键词	atmospheric circulation; extreme event; general circulation model; heating; Madden-Julian oscillation; sea surface temperature; temperature anomaly; winter; Atlantic Ocean; Atlantic Ocean (North); Pacific Ocean; Pacific Ocean (Equatorial); Pacific Ocean (North); United States
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146480
作者单位	Climate Prediction Center, NCEP/NOAA, 5830 University Research Court, College Park, MD 20740, United States
推荐引用方式 GB/T 7714	Peng P.,Kumar A.,Chen M.,et al. Was the North American extreme climate in winter 2013/14 a SST forced response?[J],2019,52(2020-05-06).
APA	Peng P.,Kumar A.,Chen M.,Hu Z.-Z.,&Jha B..(2019).Was the North American extreme climate in winter 2013/14 a SST forced response?.Climate Dynamics,52(2020-05-06).
MLA	Peng P.,et al."Was the North American extreme climate in winter 2013/14 a SST forced response?".Climate Dynamics 52.2020-05-06(2019).