期刊
GEOPHYSICAL RESEARCH LETTERS
卷 43, 期 4, 页码 1772-1779出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL067545
关键词
-
资金
- DFG Research Unit [FOR 1095, LA1025/13-2, LA1025/14-2, LA1025/15-2]
- DFG [LA 1025/19-1]
- BMBF MiKlip project [01LP1168A]
- project StratoClim [603557]
- U.S. NSF [AGS-1264195]
- Royal Society Marsden Fund
- NIWA
- Environment Research and Technology Development Fund of the Ministry of the Environment, Japan [2-1303]
- Grants-in-Aid for Scientific Research [25281006] Funding Source: KAKEN
- Directorate For Geosciences
- Div Atmospheric & Geospace Sciences [1264195] Funding Source: National Science Foundation
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 (F-trop) 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), F-trop trends across 100 hPa are contrasted with those across the tropopause: while F-trop 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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据