| DOI: | 10.1002/2015GL065623
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| 论文题名: | The origin of water vapor rings in tropical oceanic cold pools |
| 作者: | Langhans W.; Romps D.M.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9422
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| EISSN: | 1944-9153
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| 出版年: | 2015
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| 卷: | 42, 期:18 | | 起始页码: | 7825
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| 结束页码: | 7834
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| 语种: | 英语
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| 英文关键词: | cold pools
; large-eddy simulation
; latent heat fluxes
; tropical convection
; water vapor rings
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| Scopus关键词: | Evaporation
; Heat flux
; Lakes
; Large eddy simulation
; Latent heat
; Natural convection
; Rain
; Tropical engineering
; Tropics
; Cold pool
; Conceptual model
; Deep convection
; Moist static energy
; Specific humidity
; Surface latent heat fluxes
; Tropical atmospheres
; Tropical convection
; Water vapor
; cumulus
; evaporation
; humidity
; large eddy simulation
; latent heat flux
; parameterization
; thermodynamics
; water vapor
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| 英文摘要: | Tropical deep convection over the ocean is found to grow preferentially from thermodynamically preconditioned regions of high specific humidity and, thus, high moist static energy. For this reason, rings of enhanced specific humidity at the leading edges of evaporatively driven cold pools have recently received considerable attention. The prevailing theory explains these rings by the water vapor source from the evaporation of rain drops below cloud base. Their origin is studied in this letter using large-eddy simulations of individual cumulus clouds that rise into a tropical atmosphere over ocean. It is demonstrated that - in contrast to this theory - water vapor rings are primarily explained by surface latent heat fluxes rather than by the evaporation of rain. This finding implies that conceptual models used in subgrid-scale parameterizations of deep convection should consider the formation of rings of increased specific humidity by the cold-pool-induced enhancement of surface fluxes. © 2015 American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945174048&doi=10.1002%2f2015GL065623&partnerID=40&md5=2c532dff483497f839c6580bac6e83f6
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| Citation statistics: |
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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/9037
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| 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: | Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
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| Recommended Citation: | |
Langhans W.,Romps D.M.. The origin of water vapor rings in tropical oceanic cold pools[J]. Geophysical Research Letters,2015-01-01,42(18).
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