DOI: 10.1175/JCLI-D-15-0799.1
Scopus记录号: 2-s2.0-84995388246
论文题名: Assessing the radiative effects of global ice clouds based on CloudSat and CALIPSO measurements
作者: Hong Y. ; Liu G. ; Li J.-L.F.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 21 起始页码: 7651
结束页码: 7674
语种: 英语
Scopus关键词: Budget control
; Clouds
; Cooling
; Earth atmosphere
; Remote sensing
; Tropics
; Upper atmosphere
; Cirrus clouds
; Cloud radiative effects
; Lidars/lidar observations
; Radars/radar observations
; Satellite observations
; Ice
英文摘要: Although it is well established that cirrus warms Earth, the radiative effect of the entire spectrum of ice clouds is not well understood. In this study, the role of all ice clouds in Earth's radiation budget is investigated by performing radiative transfer modeling using ice cloud properties retrieved from CloudSat and CALIPSO measurements as inputs. Results show that, for the 2008 period, the warming effect (~21.8 ± 5.4 W m-2) induced by ice clouds trapping longwave radiation exceeds their cooling effect (~-16.7 ± 1.7 W m-2) caused by shortwave reflection, resulting in a net warming effect (~5.1 ± 3.8 W m-2) globally on the earth-atmosphere system. The net warming is over 15 W m-2 in the tropical deep convective regions, whereas cooling occurs in the midlatitudes, which is less than 10 W m-2 in magnitude. Seasonal variations of ice cloud radiative effects are evident in the midlatitudes where the net effect changes from warming during winter to cooling during summer, whereas warming occurs all year-round in the tropics. Ice cloud optical depthτis shown to be an important factor in determining the sign and magnitude of the net radiative effect. Ice clouds withτ < 4.6 display a warming effect with the largest contributions from those withτ≈ 1.0. In addition, ice clouds cause vertically differential heating and cooling of the atmosphere, particularly with strong heating in the upper troposphere over the tropics. At Earth's surface, ice clouds produce a cooling effect no matter how small theτvalue is. © 2016 American Meteorological Society. 资助项目: NASA, National Aeronautics and Space Administration
; NASA, National Aeronautics and Space Administration
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50114
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, FL, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
Hong Y.,Liu G.,Li J.-L.F.. Assessing the radiative effects of global ice clouds based on CloudSat and CALIPSO measurements[J]. Journal of Climate,2016-01-01,29(21)