气候变化领域集成服务门户(CCPortal): Frequency-Dependent Behavior of Zonal Jet Variability

CCPortal

DOI	10.1029/2019GL086585
	Frequency-Dependent Behavior of Zonal Jet Variability
	Lindgren E.A.; Sheshadri A.; Plumb R.A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:6
英文摘要	Recent work suggests that storm track diagnostics such as eddy heat fluxes and eddy kinetic energies have very small signatures in the first annular mode of zonal mean zonal wind, suggesting a lack of co-variability between the locations of the extratropical jet and storm tracks. The frequency-dependence of this apparent decoupling is explored in ERA-Interim reanalysis data. The annular modes show similar spatial characteristics in the different frequency ranges considered. Cancellation between the signatures of storm track diagnostics in the leading low-pass and high-pass filtered annular modes is evident, partly explaining their small signature in the total. It is shown that at timescales greater than 30 days, the first zonal wind mode describes latitudinal shifts of both the midlatitude jet and its associated storm tracks, and it appears that the persistence of zonal wind anomalies is sustained primarily by a baroclinic feedback. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Kinetic energy; Storms; Eddy kinetic energy; Frequency dependence; Low frequency behavior; Southern Annular Mode; Spatial characteristics; Storm track; Temporal filters; Zonal-mean zonal winds; High pass filters; instrumentation; latitudinal gradient; storm track; zonal wind
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170574
作者单位	Department of Earth System Science, Stanford University, Stanford, CA, United States; Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States
推荐引用方式 GB/T 7714	Lindgren E.A.,Sheshadri A.,Plumb R.A.. Frequency-Dependent Behavior of Zonal Jet Variability[J],2020,47(6).
APA	Lindgren E.A.,Sheshadri A.,&Plumb R.A..(2020).Frequency-Dependent Behavior of Zonal Jet Variability.Geophysical Research Letters,47(6).
MLA	Lindgren E.A.,et al."Frequency-Dependent Behavior of Zonal Jet Variability".Geophysical Research Letters 47.6(2020).