DOI: 10.1002/2014GL060904
论文题名: The role of large-scale convective organization for tropical high cloud amount
作者: Radley C. ; Fueglistaler S.
刊名: Geophysical Research Letters
ISSN: 0094-9946
EISSN: 1944-9677
出版年: 2014
卷: 41, 期: 14 起始页码: 5259
结束页码: 5263
语种: 英语
英文关键词: high cloud amount
; tropical convection
Scopus关键词: Earth sciences
; Geophysics
; Cloud amount
; Convective mass flux
; Geophysical fluid dynamics laboratories
; Large-scale distribution
; Nonconvective clouds
; Radiative effects
; Sea surface temperature (SST)
; Tropical convection
; Tropics
; convective cloud
; humidity
; mass movement
; nonlinearity
; sea surface temperature
; tropical meteorology
英文摘要: Tropical high clouds are closely coupled to deep convection, but local cloud amount and convective mass flux are nonlinearly related. We use the Geophysical Fluid Dynamics Laboratory atmosphere-only model AM2 forced with idealized sea surface temperature (SST) perturbations to study the sensitivity of high clouds to the large-scale distribution of convection. Increasing/decreasing the SST contrast between convective and nonconvective regions decreases/increases the tropical deep convective area, and warming of convective areas decreases the tropical average convective mass flux (〈mc〉). In all experiments, fractional high cloud amount changes are less than fractional changes in 〈mc〉. High cloud amount is half as sensitive as expected from the climatological average cloud amount, as a function of convective mass flux, due to strong compensation from nonconvective high clouds. The latter results from changes in relative humidity related to the change in 〈mc〉. This effect renders high cloud amount remarkably robust to perturbations, though radiative effects of convective and nonconvective clouds will differ. © 2014. American Geophysical Union. All Rights Reserved.f. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904520513&doi=10.1002%2f2014GL060904&partnerID=40&md5=45ca55dd0e1290df5a47d5b16b1c47b3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7210
Appears in Collections: 气候减缓与适应
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作者单位: Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, United States
Recommended Citation:
Radley C.,Fueglistaler S.. The role of large-scale convective organization for tropical high cloud amount[J]. Geophysical Research Letters,2014-01-01,41(14).