DOI: 10.1002/2013GL057984
论文题名: A process-based framework for quantifying the atmospheric preconditioning of surface-triggered convection
作者: Tawfik A.B. ; Dirmeyer P.A.
刊名: Geophysical Research Letters
ISSN: 0094-10515
EISSN: 1944-10246
出版年: 2014
卷: 41, 期: 1 起始页码: 173
结束页码: 178
语种: 英语
英文关键词: atmospheric background
; boundary layer growth
; buoyant mixing
; convective triggering
; land-atmosphere interaction
; moist convection diagnostic
Scopus关键词: Boundary layer growth
; Buoyant mixing
; convective triggering
; Land-atmosphere interactions
; Moist convection
; Atmospheric humidity
; Buoyancy
; Condensation
; Mixing
; Electric load management
; accuracy assessment
; atmospheric convection
; buoyancy
; climate effect
; climate forcing
; condensation
; surface flux
英文摘要: Here we introduce the heated condensation framework, which contains a suite of variables for isolating the atmospheric boundary state from local surface forcing. The buoyant condensation level (BCL) and buoyant mixing temperature (θBM) quantify the degree to which the atmosphere is preconditioned for moist convection and can be calculated for any time of day or year using standard vertical profiles of temperature and humidity. Unlike the lifted condensation level and convective inhibition, the BCL is constructed through incremental mixing from the surface rather than lifting a hypothetical parcel. In this regard, the BCL represents a conserved condensation level diagnostic inherent to a given profile. The BCL and θBM are shown to be applicable over a range of climate regimes and respond to synoptic and mesoscale forcings, illustrating its broader utility. A suite of variables relating the BCL directly to surface fluxes is also introduced. Key Points Presents a new framework that accurately captures convective triggering Framework metrics are inherent to profiles; not subject to parcel selection bias Heat and moisture necessary for triggering convection can be directly quantified ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896729016&doi=10.1002%2f2013GL057984&partnerID=40&md5=4edd8b99c06892093f629a4aa45f61ca
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7779
Appears in Collections: 气候减缓与适应
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作者单位: Center for Ocean-Land-Atmosphere Studies, George Mason University, Mail Stop 6C5, 4400 University Drive, Fairfax, VA 22030, United States
Recommended Citation:
Tawfik A.B.,Dirmeyer P.A.. A process-based framework for quantifying the atmospheric preconditioning of surface-triggered convection[J]. Geophysical Research Letters,2014-01-01,41(1).