DOI: 10.1002/2015GL067545
论文题名: Is the Brewer-Dobson circulation increasing or moving upward?
作者: Oberländer-Hayn S. ; Gerber E.P. ; Abalichin J. ; Akiyoshi H. ; Kerschbaumer A. ; Kubin A. ; Kunze M. ; Langematz U. ; Meul S. ; Michou M. ; Morgenstern O. ; Oman L.D.
刊名: Geophysical Research Letters
ISSN: 0094-9337
EISSN: 1944-9068
出版年: 2016
卷: 43, 期: 4 起始页码: 1772
结束页码: 1779
语种: 英语
英文关键词: Brewer-Dobson circulation
; climate change
; stratosphere
; tropical upward mass flux
; tropopause
; upward shift
Scopus关键词: Atmospheric chemistry
; Climate change
; Clouds
; Fluorine
; Greenhouse gases
; Upper atmosphere
; Atmospheric circulation
; Brewer-Dobson circulation
; Chemistry-climate models
; Greenhouse gas (GHG)
; Meridional circulation
; Stratosphere-troposphere exchange
; Tropopause
; Upward shift
; Climate models
英文摘要: The meridional circulation of the stratosphere, or Brewer-Dobson circulation (BDC), is projected to accelerate with increasing greenhouse gas (GHG) concentrations. The acceleration is typically quantified by changes in the tropical upward mass flux (Ftrop) across a given pressure surface. Simultaneously, models project a lifting of the entire atmospheric circulation in response to GHGs; notably, the tropopause rises about a kilometer over this century. In this study, it is shown that most of the BDC trend is associated with the rise in the circulation. Using a chemistry-climate model (CCM), Ftrop trends across 100 hPa are contrasted with those across the tropopause: while Ftrop at 100 hPa increases 1-2 %/decade, the mass flux entering the atmosphere above the tropopause actually decreases. Similar results are found for other CCMs, suggesting that changes in the BDC may better be described as an upward shift of the circulation, as opposed to an increase, with implications for the mechanism and stratosphere-troposphere exchange. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959432209&doi=10.1002%2f2015GL067545&partnerID=40&md5=2783214f75640d18ed94bb67bd25d08d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10300
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Institut für Meteorologie, Freie Universität Berlin, Berlin, Germany
Recommended Citation:
Oberländer-Hayn S.,Gerber E.P.,Abalichin J.,et al. Is the Brewer-Dobson circulation increasing or moving upward?[J]. Geophysical Research Letters,2016-01-01,43(4).