DOI: 10.1007/s00382-013-1905-7
Scopus记录号: 2-s2.0-84894371955
论文题名: On the ratio between shifts in the eddy-driven jet and the Hadley cell edge
作者: Staten P.W. ; Reichler T.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 42, 期: 2017-05-06 起始页码: 1229
结束页码: 1242
语种: 英语
英文关键词: Atmospheric circulation
; Climate change
; Ferrel cell
; General circulation
; Hadley cell
; Tropical-extratropical interaction
英文摘要: This study explores the relationship between latitudinal shifts in the eddy-driven jet and in the Hadley cell edge as depicted in models and reanalyses. We calculate an interannual shift ratio of approximately 1.5:1 between the eddy-driven jet and the Hadley cell edge over the Southern Hemisphere during austral summer in model data. We further find that the ratio varies from season to season, with similarities between corresponding seasons over each hemisphere. Ratios are broadly consistent between models in this study, and appear to be realistic when compared to those from reanalyses. Mean tropical SSTs and the strength of zonal winds in the tropics appear to be critical to determining the ratio, while sea surface temperature variability is not. We argue that conditions in the tropics act to modulate the effect of midlatitude eddies on the Hadley cell, and the action of eddies in turn explains most of the correlated shifts from year to year. In contrast, the mean state of the tropics is a poor predictor of both the ratio of observed trends in reanalyses and the ratio of modeled externally forced shifts. We show that the ratios of modeled shifts are dependent on the type of external forcing. © 2013 Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54250
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Atmospheric Sciences, University of Utah, 135 South 1460 East, Salt Lake City, UT, 84112-0110, United States; Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Rd. M/S 233-304, Pasadena, CA, 91109, United States
Recommended Citation:
Staten P.W.,Reichler T.. On the ratio between shifts in the eddy-driven jet and the Hadley cell edge[J]. Climate Dynamics,2014-01-01,42(2017-05-06)