DOI: 10.1002/grl.50796
论文题名: Influence of entrainment on the thermal stratification in simulations of radiative-convective equilibrium
作者: Singh M.S. ; O'Gorman P.A.
刊名: Geophysical Research Letters
ISSN: 0094-8629
EISSN: 1944-8360
出版年: 2013
卷: 40, 期: 16 起始页码: 4398
结束页码: 4403
语种: 英语
英文关键词: CAPE
; convection
; entrainment
Scopus关键词: CAPE
; Convective available potential energies
; Entraining plume model
; Radiative-convective equilibrium
; Radiosonde observations
; Surface temperatures
; Systematic deviation
; Tropical atmospheres
; Air entrainment
; Atmospheric temperature
; Heat convection
; Thermal stratification
; Buoyancy
; buoyancy
; entrainment
; global warming
; high temperature
; numerical model
; potential energy
; radiative forcing
; surface temperature
; temperature effect
英文摘要: Convective available potential energy (CAPE) is shown to increase rapidly with warming in simulations of radiative-convective equilibrium over a wide range of surface temperatures. The increase in CAPE implies a systematic deviation of the thermal stratification from moist adiabatic that is non-negligible at high temperatures. However, cloud buoyancy remains much smaller than what CAPE would imply because entrainment is more effective in reducing buoyancy in warmer atmospheres. An entraining plume model in the limit of zero cloud buoyancy is shown to reproduce the increase in CAPE with warming if the entrainment rate is held fixed and increases in the vertical extent of convection are taken into account. These model results together with radiosonde observations are used to support a conceptual model in which entrainment plays a role in determining the thermal stratification of the tropical atmosphere. Key Points CAPE increases with warming in simulations of radiative-convective equilibrium Cloud buoyancy remains small because of entrainment Observations suggest entrainment also influences tropical stratification. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84883088629&doi=10.1002%2fgrl.50796&partnerID=40&md5=f2746405e26a10aed2245030adac7a6b
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5893
Appears in Collections: 气候减缓与适应
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作者单位: Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139, United States
Recommended Citation:
Singh M.S.,O'Gorman P.A.. Influence of entrainment on the thermal stratification in simulations of radiative-convective equilibrium[J]. Geophysical Research Letters,2013-01-01,40(16).