DOI: 10.1175/JCLI-D-16-0394.1
Scopus记录号: 2-s2.0-85008709471
论文题名: Observed changes in the Southern Hemispheric circulation in May
作者: Ivy D.J. ; Hilgenbrink C. ; Kinnison D. ; Plumb R.A. ; Sheshadri A. ; Solomon S. ; Thompson D.W.J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 2 起始页码: 527
结束页码: 536
语种: 英语
Scopus关键词: Fighter aircraft
; Ozone
; Ozone layer
; Troposphere
; Antarctic ozone hole
; Circulation changes
; Latitudinal distribution
; Lowermost stratosphere
; Southern Hemisphere
; Stratosphere-troposphere coupling
; Stratospheric circulations
; Tropospheric circulation
; Upper atmosphere
; atmospheric circulation
; jet stream
; ozone depletion
; seasonality
; Southern Hemisphere
; stratosphere-troposphere interaction
; zonal wind
; Pacific Ocean
英文摘要: Much research has focused on trends in the Southern Hemispheric circulation in austral summer (December-February) in the troposphere and stratosphere, whereas changes in other seasons have received less attention. Here the seasonality and structure of observed changes in tropospheric and stratospheric winds, temperature, and ozone over the Southern Hemisphere are examined. It is found that statistically significant trends similar to those of the Antarctic summer season are also observed since 1979 in austral fall, particularly May, and are strongest over the Pacific sector of the hemisphere. Evidence is provided for a significant shift in the position of the jet in May over the Pacific, and it is shown that the strengthening and shifting of the jet has rendered the latitudinal distribution of upper-tropospheric zonal wind more bimodal. The Antarctic ozone hole has cooled the lower stratosphere and strengthened the polar vortex. While the mechanism and timing are not fully understood, the ozone hole has been identified as a key driver of the summer season tropospheric circulation changes in several previous observational and modeling studies. It is found here that significant ozone depletion and associated polar cooling also occur in the lowermost stratosphere and tropopause region through austral fall, with spatial patterns that are coincident with the observed changes in stratospheric circulation. It is also shown that radiatively driven temperature changes associated with the observed ozone depletion in May represent a substantial portion of the observed May cooling in the lowermost stratosphere, suggesting a potential for contribution to the circulation changes. © 2017 American Meteorological Society. 资助项目: NSF, Norsk Sykepleierforbund
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49781
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; National Center for Atmospheric Research, Boulder, CO, United States; Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States
Recommended Citation:
Ivy D.J.,Hilgenbrink C.,Kinnison D.,et al. Observed changes in the Southern Hemispheric circulation in May[J]. Journal of Climate,2017-01-01,30(2)