DOI: 10.1175/JCLI-D-17-0586.1
Scopus记录号: 2-s2.0-85048507313
论文题名: Quantifying the contribution of different cloud types to the radiation budget in southern West Africa
作者: Hill P.G. ; Allan R.P. ; Chiu J.C. ; Bodas-Salcedo A. ; Knippertz P.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 13 起始页码: 5273
结束页码: 5291
语种: 英语
英文关键词: Africa
; Atmosphere
; Cloud radiative effects
; Clouds
; Radiation budgets
; Tropics
Scopus关键词: Atmospheric structure
; Budget control
; Climate models
; Clouds
; Earth atmosphere
; Tropics
; Africa
; Atmospheric profile
; Cloud radiative effects
; Passive satellites
; Radiation budget
; Radiative transfer calculations
; Top of the atmospheres
; Vertical structures
; Radiation effects
; CALIPSO
; climate modeling
; cloud cover
; cloud radiative forcing
; CloudSat
; MODIS
; radiation budget
; satellite data
; shortwave radiation
; West Africa
英文摘要: The contribution of cloud to the radiation budget of southern West Africa (SWA) is poorly understood and yet it is important for understanding regional monsoon evolution and for evaluating and improving climate models, which have large biases in this region. Radiative transfer calculations applied to atmospheric profiles obtained from the CERES-CloudSat-CALIPSO-MODIS (CCCM) dataset are used to investigate the effects of 12 different cloud types (defined by their vertical structure) on the regional energy budget of SWA (5°-10°N, 8°W-8°E) during June-September. We show that the large regional mean cloud radiative effect in SWA is due to nonnegligible contributions from many different cloud types; eight cloud types have a cloud fraction larger than 5% and contribute at least 5% of the regional mean shortwave cloud radiative effect at the top of the atmosphere. Low clouds, which are poorly observed by passive satellite measurements, were found to cause net radiative cooling of the atmosphere, which reduces the heating from other cloud types by approximately 10%. The sensitivity of the radiation budget to underestimating low-cloud cover is also investigated. The radiative effect of missing low cloud is found to be up to approximately -25 W m-2 for upwelling shortwave irradiance at the top of the atmosphere and 35 W m-2 for downwelling shortwave irradiance at the surface. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111473
Appears in Collections: 气候减缓与适应
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作者单位: University of Reading, Reading, United Kingdom; National Centre for Earth Observation, Reading, United Kingdom; University of Reading, Reading, United Kingdom; Colorado State University, Fort Collins, CO, United States; Met Office Hadley Centre, Exeter, United Kingdom; Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
Recommended Citation:
Hill P.G.,Allan R.P.,Chiu J.C.,et al. Quantifying the contribution of different cloud types to the radiation budget in southern West Africa[J]. Journal of Climate,2018-01-01,31(13)