气候变化领域集成服务门户(CCPortal): Tropical influence on the North Pacific Oscillation drives winter extremes in North America

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DOI	10.1038/s41558-019-0461-5
	Tropical influence on the North Pacific Oscillation drives winter extremes in North America
	Sung M.-K.; Jang H.-Y.; Kim B.-M.; Yeh S.-W.; Choi Y.-S.; Yoo C.
发表日期	2019
ISSN	1758678X
卷号	9 期号:5
英文摘要	Since the turn of the twenty-first century, North America has experienced a number of record-breaking warm and cold winters. Thus, determining what causes these extremes is of great interest. Here we show that an eastward shift of the North Pacific Oscillation (NPO) in recent decades has caused its flip in phases to have more influence in causing abnormal warming and cooling over North America. Observations and climate models reveal the zonal displacement on an interdecadal timescale, and it is largely attributable to a Rossby wave response to the La Niña-like mean state of the tropical Pacific. This tropical influence affects the atmospheric mean baroclinicity over the extratropical North Pacific, which regulates the rate of available potential energy conversion that feeds the NPO. These results suggest that, as long as the NPO remains in the east, North America may continue to experience prolonged winter extremes. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	air-sea interaction; atmosphere-ocean coupling; cooling; decadal variation; displacement; extratropical environment; La Nina; potential energy; Rossby wave; winter; North America; Pacific Ocean; Pacific Ocean (North); Pacific Ocean (Tropical)
来源期刊	Nature Climate Change
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124418
作者单位	Ewha Womans University, Seoul, South Korea; Environmental Prediction Research Incorporation, Seoul, South Korea; Department of Environmental Atmospheric Sciences, Pukyong National University, Busan, South Korea; Hanyang University, ERICA, Ansan, South Korea; Yonsei University, Seoul, South Korea
推荐引用方式 GB/T 7714	Sung M.-K.,Jang H.-Y.,Kim B.-M.,et al. Tropical influence on the North Pacific Oscillation drives winter extremes in North America[J],2019,9(5).
APA	Sung M.-K.,Jang H.-Y.,Kim B.-M.,Yeh S.-W.,Choi Y.-S.,&Yoo C..(2019).Tropical influence on the North Pacific Oscillation drives winter extremes in North America.Nature Climate Change,9(5).
MLA	Sung M.-K.,et al."Tropical influence on the North Pacific Oscillation drives winter extremes in North America".Nature Climate Change 9.5(2019).