DOI: 10.1175/JCLI-D-15-0521.1
Scopus记录号: 2-s2.0-84964804762
论文题名: The role of cloud radiative heating in determining the location of the ITCZ in aquaplanet simulations
作者: Harrop B.E. ; Hartmann D.L.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 8 起始页码: 2741
结束页码: 2763
语种: 英语
Scopus关键词: Clouds
; Heat radiation
; Heating
; Moisture
; Oceanography
; Radiant heating
; CAPE
; Cloud radiative effects
; Cloud-radiation interactions
; General circulation model
; Hadley circulation
; Intertropical convergence zone
; Meridional circulation
; Precipitation efficiency
; Precipitation (meteorology)
; climate modeling
; cloud cover
; cloud radiative forcing
; general circulation model
; Hadley cell
; heating
; intertropical convergence zone
; precipitation (climatology)
; tropical meteorology
英文摘要: The relationship between the tropical circulation and cloud radiative effect is investigated. Output from the Clouds On-Off Klimate Intercomparison Experiment (COOKIE) is used to examine the impact of cloud radiative effects on circulation and climate. In aquaplanet simulations with a fixed SST pattern, the cloud radiative effect leads to an equatorward contraction of the intertropical convergence zone (ITCZ) and a reduction of the double ITCZ problem. It is shown that the cloud radiative heating in the upper troposphere increases the temperature, weakens CAPE, and inhibits the onset of convection until it is closer to the equator, where SSTs are higher. Precipitation peaks at higher values in a narrower band when the cloud radiative effects are active, compared to when they are inactive, owing to the enhancement in moisture convergence. Additionally, cloud-radiation interactions strengthen the mean meridional circulation and consequently enhance the moisture convergence. Although the mean tropical precipitation decreases, the atmospheric cloud radiative effect has a strong meridional gradient, which supports stronger poleward energy flux and speeds up the Hadley circulation. Cloud radiative heating also enhances cloud water path (liquid plus ice), which, combined with the reduction in precipitation, suggests that the cloud radiative heating reduces precipitation efficiency in these models. © 2016 American Meteorological Society. 资助项目: NSF, National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49989
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States
Recommended Citation:
Harrop B.E.,Hartmann D.L.. The role of cloud radiative heating in determining the location of the ITCZ in aquaplanet simulations[J]. Journal of Climate,2016-01-01,29(8)