DOI: 10.1002/2016GL071206
论文题名: The effect of subtropical aerosol loading on equatorial precipitation
作者: Dagan G. ; Chemke R.
刊名: Geophysical Research Letters
ISSN: 0094-8470
EISSN: 1944-8201
出版年: 2016
卷: 43, 期: 20 起始页码: 11048
结束页码: 11056
语种: 英语
英文关键词: aerosol
; clouds
; rain
; tropical circulation
Scopus关键词: Aerosols
; Atmospheric movements
; Climate change
; Clouds
; Large eddy simulation
; Rain
; Water vapor
; Aerosol concentration
; Atmospheric water vapor
; Bin microphysics
; General circulation
; General circulation model
; Hadley circulation
; Sources of uncertainty
; Water vapor transport
; Tropics
英文摘要: Cloud-aerosol interactions are considered as one of the largest sources of uncertainties in the study of climate change. Here another possible cloud-aerosol effect on climate is proposed. A series of large eddy simulations (LES) with bin microphysics reveal a sensitivity of the total atmospheric water vapor amount to aerosol concentration. Under polluted conditions the rain is suppressed and the total amount of water vapor in the atmosphere increases with time compared to clean precipitating conditions. Theoretical examination of this aerosol effect on water vapor transport from the subtropics to the tropics, and hence on the equatorial rain and Hadley circulation, is conducted using an idealized general circulation model (GCM). It is shown that a reduction in the subtropical rain amount results in increased water vapor advection to the tropics and enhanced equatorial rain and Hadley circulation. This joins previously proposed mechanisms on the radiative aerosol effect on the general circulation. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84995653325&doi=10.1002%2f2016GL071206&partnerID=40&md5=c7c3904a13fe49fdc7529116e2e5a3f5
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9433
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: Department of Earth and Planetary Sciences, Weizmann institute of Science, Rehovot, Israel
Recommended Citation:
Dagan G.,Chemke R.. The effect of subtropical aerosol loading on equatorial precipitation[J]. Geophysical Research Letters,2016-01-01,43(20).