DOI: 10.1175/JCLI-D-15-0167.1
Scopus记录号: 2-s2.0-84957836984
论文题名: Radiative impacts of the 2011 abrupt drops in water vapor and ozone in the tropical tropopause layer
作者: Gilford D.M. ; Solomon S. ; Portmann R.W.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 2 起始页码: 595
结束页码: 612
语种: 英语
Scopus关键词: Atmospheric radiation
; Carbon dioxide
; Clouds
; Drops
; Ozone
; Ozone layer
; Radiative transfer
; Thin layer chromatography
; Microwave limb sounder
; Radiative forcings
; Radiative transfer model
; Satellite observations
; Stratospheric circulations
; Tropical tropopause layers
; Tropopause
; Water vapor concentration
; Water vapor
; air temperature
; algorithm
; atmospheric circulation
; ozone
; radiative forcing
; stratosphere
; tropical meteorology
; tropopause
; water vapor
英文摘要: An abrupt drop in tropical tropopause layer (TTL) water vapor, similar to that observed in 2000, recently occurred in 2011, and was concurrent with reductions in TTL temperature and ozone. Previous studies have indicated that such large water vapor variability can have significant radiative impacts. This study uses Aura Microwave Limb Sounder observations, the Stratospheric Water Vapor and Ozone Satellite Homogenized dataset, and two radiative transfer models to examine the radiative effects of the observed changes in TTL water vapor and ozone on TTL temperatures and global radiative forcing (RF). The analyses herein suggest that quasi-isentropic poleward propagation of TTL water vapor reductions results in a zonal-mean structure with ''wings'' of extratropical water vapor reductions, which account for about half of the 2011 abrupt drop global radiative impact. RF values associated with the mean water vapor concentrations differences between 2012/13 and 2010/11 are between -0.01 and -0.09 Wm -2, depending upon the altitude above which perturbations are considered. TTL water vapor and ozone variability during this period jointly lead to a transient radiative cooling of ~0.25-0.5K in layers below the tropopause. The 2011 abrupt drop also prolonged the reduction in stratospheric water vapor that followed the 2000 abrupt drop, providing a longer-term radiative forcing of climate. Water vapor concentrations from 2005 to 2013 are lower than those from 1990 to 1999, resulting in a RF between these periods of about -0.045Wm -2, approximately 12% as large as, but of opposite sign to, the concurrent estimated CO2 forcing. © 2016 American Meteorological Society. 资助项目: NSF, National Science Foundation
; NSF, National Science Foundation
; NASA, National Science Foundation
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50084
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA, United States; National Oceanic and Atmospheric Administration, Earth System Research Laboratory, Chemical Sciences Division, Boulder, CO, United States
Recommended Citation:
Gilford D.M.,Solomon S.,Portmann R.W.. Radiative impacts of the 2011 abrupt drops in water vapor and ozone in the tropical tropopause layer[J]. Journal of Climate,2016-01-01,29(2)