气候变化领域集成服务门户(CCPortal): Intra-seasonal and seasonal variability of the Northern Hemisphere extra-tropics

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DOI	10.1007/s00382-019-04827-9
	Intra-seasonal and seasonal variability of the Northern Hemisphere extra-tropics
	Stan C.; Krishnamurthy V.
发表日期	2019
ISSN	0930-7575
起始页码	4821
结束页码	4839
卷号	53 期号:2020-07-08
英文摘要	The natural variability of the Northern Hemisphere extra-tropics is studied at seasonal and intra-seasonal time scales. Nonlinear oscillations in the extra-tropics are extracted from daily anomalies of 500-hPa geopotential height for the period 1979–2012 using a data-adaptive method. Three propagating oscillations with broad-band spectra centered at 120, 45, and 28 days are found. When combined, the oscillations explain up to 30% of the natural variability of the extra-tropics on the intra-seasonal to seasonal time scales. These oscillations share some features with the circumglobal wave guide and in some phases of their lifecycles they project onto the canonical teleconnection patterns. When used as predictors in a simple linear regression model with 2-m temperature as predictand, the mid-latitude oscillations extend the potential predictability of dependent variable to about 20 days. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Atmospheric oscillations; Intraseasonal variability; Mid-latitude atmosphere
语种	英语
scopus关键词	climate oscillation; extratropical environment; geopotential; midlatitude environment; Northern Hemisphere; regression analysis; seasonal variation; teleconnection
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/145952
作者单位	Department of Atmospheric, Oceanic and Earth Sciences, George Mason University, Fairfax, VA 22030, United States; Center for Ocean-Land-Atmosphere Studies, George Mason University, Fairfax, VA, United States
推荐引用方式 GB/T 7714	Stan C.,Krishnamurthy V.. Intra-seasonal and seasonal variability of the Northern Hemisphere extra-tropics[J],2019,53(2020-07-08).
APA	Stan C.,&Krishnamurthy V..(2019).Intra-seasonal and seasonal variability of the Northern Hemisphere extra-tropics.Climate Dynamics,53(2020-07-08).
MLA	Stan C.,et al."Intra-seasonal and seasonal variability of the Northern Hemisphere extra-tropics".Climate Dynamics 53.2020-07-08(2019).