DOI: 10.1002/2015GL066199
论文题名: Why does tropical convective available potential energy (CAPE) increase with warming?
作者: Seeley J.T. ; Romps D.M.
刊名: Geophysical Research Letters
ISSN: 0094-8377
EISSN: 1944-8108
出版年: 2015
卷: 42, 期: 23 起始页码: 10429
结束页码: 10437
语种: 英语
英文关键词: buoyancy
; global warming
; tropical convection
Scopus关键词: Atmospheric temperature
; Buoyancy
; Global warming
; Molecular physics
; Potential energy
; Surface waters
; Tropics
; Troposphere
; Cloud resolving simulations
; Convective available potential energies
; Fundamental physics
; Lower troposphere
; Radiative-convective equilibrium
; Saturation deficit
; Sea surface temperature (SST)
; Tropical convection
; Oceanography
英文摘要: Recent work has produced a theory for tropical convective available potential energy (CAPE) that highlights the Clausius-Clapeyron (CC) scaling of the atmosphere's saturation deficit as a driver of increases in CAPE with warming. Here we test this so-called "zero-buoyancy" theory for CAPE by modulating the saturation deficit of cloud-resolving simulations of radiative-convective equilibrium in two ways: changing the sea surface temperature (SST) and changing the environmental relative humidity (RH). For earthlike and warmer SSTs, undilute parcel buoyancy in the lower troposphere is insensitive to increasing SST because of a countervailing CC scaling that balances the increase in the saturation deficit; however, buoyancy increases dramatically with SST in the upper troposphere. Conversely, in the RH experiment, undilute buoyancy throughout the troposphere increases monotonically with decreasing RH. We show that the zero-buoyancy theory successfully predicts these contrasting behaviors, building confidence that it describes the fundamental physics of CAPE and its response to warming. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84953449543&doi=10.1002%2f2015GL066199&partnerID=40&md5=c0d8897dc41de335aed72e9b2555d2ba
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7993
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 Science, University of California, Berkeley, CA, United States
Recommended Citation:
Seeley J.T.,Romps D.M.. Why does tropical convective available potential energy (CAPE) increase with warming?[J]. Geophysical Research Letters,2015-01-01,42(23).