Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JCLI-D-16-0849.1 |
Understanding the Time Scales of the Tropospheric Circulation Response to Abrupt CO2 Forcing in the Southern Hemisphere: Seasonality and the Role of the Stratosphere | |
Grise, Kevin M.1; Polvani, Lorenzo M.2,3,4 | |
2017-11-01 | |
发表期刊 | JOURNAL OF CLIMATE |
ISSN | 0894-8755 |
EISSN | 1520-0442 |
出版年 | 2017 |
卷号 | 30期号:21 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | This study examines the time scales of the Southern Hemisphere (SH) tropospheric circulation response to increasing atmospheric CO2 concentrations in models from phase 5 of the Coupled Model Intercomparison Project (CMIP5). In response to an abrupt quadrupling of atmospheric CO2, the midlatitude jet stream and poleward edge of the Hadley circulation shift poleward on the time scale of the rising global-mean surface temperature during the summer and fall seasons but on a much more rapid time scale during the winter and spring seasons. The seasonally varying time scales of the SH circulation response are closely tied to the meridional temperature gradient in the upper troposphere-lower stratosphere and, in particular, to temperatures in the SH polar lower stratosphere. During summer and fall, SH polar lower-stratospheric temperatures cool on the time scale of warming global surface temperatures, as the lifting of the tropopause height with tropospheric warming is associated with cooling at lower-stratospheric levels. However, during winter and spring, SH polar lower-stratospheric temperatures cool primarily from fast time-scale radiative processes, contributing to the faster time-scale circulation response during these seasons. The poleward edge of the SH subtropical dry zone shifts poleward on the time scale of the rising global-mean surface temperature during all seasons in response to an abrupt quadrupling of atmospheric CO2. The dry zone edge initially follows the poleward shift in the Hadley cell edge but is then augmented by the action of eddy moisture fluxes in a warming climate. Consequently, with increasing atmospheric CO2 concentrations, key features of the tropospheric circulation response could emerge sooner than features more closely tied to rising global temperatures. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000414646000005 |
WOS关键词 | SEA-SURFACE TEMPERATURE ; CLIMATE-CHANGE ; DYNAMICAL SENSITIVITY ; TROPICAL CIRCULATION ; HYDROLOGICAL CYCLE ; TROPOPAUSE HEIGHT ; CARBON-DIOXIDE ; STORM-TRACK ; PART I ; MODEL |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20734 |
专题 | 气候变化 |
作者单位 | 1.Univ Virginia, Dept Environm Sci, Clark Hall, Charlottesville, VA 22903 USA; 2.Columbia Univ, Dept Appl Phys & Appl Math, New York, NY USA; 3.Columbia Univ, Dept Earth & Environm Sci, New York, NY USA; 4.Columbia Univ, Lamont Doherty Earth Observ, New York, NY USA |
推荐引用方式 GB/T 7714 | Grise, Kevin M.,Polvani, Lorenzo M.. Understanding the Time Scales of the Tropospheric Circulation Response to Abrupt CO2 Forcing in the Southern Hemisphere: Seasonality and the Role of the Stratosphere[J]. JOURNAL OF CLIMATE,2017,30(21). |
APA | Grise, Kevin M.,&Polvani, Lorenzo M..(2017).Understanding the Time Scales of the Tropospheric Circulation Response to Abrupt CO2 Forcing in the Southern Hemisphere: Seasonality and the Role of the Stratosphere.JOURNAL OF CLIMATE,30(21). |
MLA | Grise, Kevin M.,et al."Understanding the Time Scales of the Tropospheric Circulation Response to Abrupt CO2 Forcing in the Southern Hemisphere: Seasonality and the Role of the Stratosphere".JOURNAL OF CLIMATE 30.21(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论