气候变化领域集成服务门户(CCPortal): Contrasting Recent Trends in Southern Hemisphere Westerlies Across Different Ocean Basins

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DOI	10.1029/2020GL088890
	Contrasting Recent Trends in Southern Hemisphere Westerlies Across Different Ocean Basins
	Waugh D.W.; Banerjee A.; Fyfe J.C.; Polvani L.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:18
英文摘要	Many studies have documented the trends in the latitudinal position and strength of the midlatitude westerlies in the Southern Hemisphere. However, very little attention has been paid to the longitudinal variations of these trends. Here, we specifically focus on the zonal asymmetries in the southern hemisphere wind trends between 1980 and 2018. Meteorological reanalyses show a large strengthening and a statistically insignificant equatorward shift of peak near-surface winds over the Pacific, in contrast to a weaker strengthening and significant poleward shift over the Atlantic and Indian Ocean sectors. The reanalysis trends fall within the ensemble spread for historical climate model simulations, showing that climate models are able to capture the observed trends. Climate model simulations indicate that the differential movement of the peak westerlies is a manifestation of internal variability and is not a forced response. Implications of these asymmetries for other components of the climate system are discussed. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Earth sciences; Geophysics; Climate model simulations; Equatorward shift; Forced response; Internal variability; Longitudinal variations; Near-surface winds; Southern Hemisphere; Zonal asymmetry; Climate models; asymmetry; climate modeling; historical record; midlatitude environment; ocean basin; Southern Hemisphere; trend analysis; westerly; Atlantic Sector; Indian Ocean; Pacific Ocean; Southern Ocean
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/169705
作者单位	Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, MD, United States; School of Mathematics and Statistics, University of New South Wales, Sydney, NSW, Australia; Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, Boulder, CO, United States; Chemical Sciences Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, United States; Canadian Centre for Climate Modelling and Analysis, Environment and Climate Change Canada, Victoria, BC, Canada; Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States
推荐引用方式 GB/T 7714	Waugh D.W.,Banerjee A.,Fyfe J.C.,et al. Contrasting Recent Trends in Southern Hemisphere Westerlies Across Different Ocean Basins[J],2020,47(18).
APA	Waugh D.W.,Banerjee A.,Fyfe J.C.,&Polvani L.M..(2020).Contrasting Recent Trends in Southern Hemisphere Westerlies Across Different Ocean Basins.Geophysical Research Letters,47(18).
MLA	Waugh D.W.,et al."Contrasting Recent Trends in Southern Hemisphere Westerlies Across Different Ocean Basins".Geophysical Research Letters 47.18(2020).