| DOI: | 10.1002/2015GL063227
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| 论文题名: | Mechanisms for convection triggering by cold pools |
| 作者: | Torri G.; Kuang Z.; Tian Y.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8858
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| EISSN: | 1944-8589
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| 出版年: | 2015
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| 卷: | 42, 期:6 | | 起始页码: | 1943
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| 结束页码: | 1950
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| 语种: | 英语
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| 英文关键词: | cloud-resolving model
; cold pools
; deep convection
; Lagrangian particle model
; radiative-convective equilibrium
; shallow to deep transition
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| Scopus关键词: | Lagrange multipliers
; Natural convection
; Cloud resolving model
; Cold pool
; Deep convection
; Lagrangian particle model
; Radiative-convective equilibrium
; Shallow to deep transition
; Lakes
; air temperature
; atmospheric convection
; climate forcing
; cold pool
; Lagrangian analysis
; marine ecosystem
; simulation
; thermodynamics
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| 英文摘要: | Cold pools are fundamental ingredients of deep convection. They contribute to organizing the subcloud layer and are considered key elements in triggering convective cells. It was long known that this could happen mechanically, through lifting by the cold pools' fronts. More recently, it has been suggested that convection could also be triggered thermodynamically, by accumulation of moisture around the edges of cold pools. A method based on Lagrangian tracking is here proposed to disentangle the signatures of both forcings and quantify their importance in a given environment. Results from a simulation of radiative-convective equilibrium over the ocean show that parcels reach their level of free convection through a combination of both forcings, each being dominant at different stages of the ascent. Mechanical forcing is an important player in lifting parcels from the surface, whereas thermodynamic forcing reduces the inhibition encountered by parcels before they reach their level of free convection. Key Points Thermodynamic effect of cold pools crucial in the inhibition layer Gust front lifting is necessary for lifting parcels from the surface No forcing mechanism by cold pools is entirely dominant; cooperation is needed ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84927797051&doi=10.1002%2f2015GL063227&partnerID=40&md5=8c1de084d387a1ac766855f1e032141d
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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/8474
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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: | Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA, United States
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| Recommended Citation: | |
Torri G.,Kuang Z.,Tian Y.. Mechanisms for convection triggering by cold pools[J]. Geophysical Research Letters,2015-01-01,42(6).
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