| DOI: | 10.1175/JCLI-D-11-00445.1
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| Scopus记录号: | 2-s2.0-84862726958
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| 论文题名: | Testing the role of radiation in determining tropical cloud-top temperature |
| 作者: | Harrop B.E.; Hartmann D.L.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2012
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| 卷: | 25, 期:17 | | 起始页码: | 5731
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| 结束页码: | 5747
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| 语种: | 英语
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| Scopus关键词: | Cloud forcing
; Cloud fraction
; Cloud resolving model
; Cloud temperature
; Cloud-top temperatures
; Convective clouds
; High altitude
; Ice clouds
; Latent heat of fusion
; Model domains
; Ozone profiles
; Primary control
; Radiative cooling
; Surface temperatures
; Upper troposphere
; Vapor emissions
; Clouds
; Ozone
; Troposphere
; Water vapor
; Vapors
; air temperature
; convective cloud
; latent heat flux
; numerical model
; ozone
; radiative forcing
; sea surface temperature
; stratosphere
; tropical environment
; troposphere
; water vapor
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| 英文摘要: | A cloud-resolving model is used to test the hypothesis that radiative cooling by water vapor emission is the primary control on the temperature of tropical anvil clouds. The temperature of ice clouds in the simulation can be increased or decreased by changing only the emissivity of water vapor in the upper troposphere. The effect of the model's fixed ozone profile on stability creates a pressure-dependent inhibition of convection, leading to a small warming in cloud-top temperature as SST is increased. Increasing stratospheric water vapor also warms the cloud-top temperature slightly. Changing the latent heat of fusion reduces the cloud fraction at high altitudes, but does not significantly change temperature at which cloud fraction peaks in the upper troposphere. The relationship between radiatively driven horizontal mass convergence and cloud fraction that causes cloud temperature to be insensitive to surface temperature is preserved when a large model domain is used so that convection aggregates in a small part of the model domain. © 2012 American Meteorological Society. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/52250
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| Appears in Collections: | 气候变化事实与影响
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作者单位: | Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States
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| Recommended Citation: | |
Harrop B.E.,Hartmann D.L.. Testing the role of radiation in determining tropical cloud-top temperature[J]. Journal of Climate,2012-01-01,25(17)
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