Arid
DOI10.1175/1520-0442(2001)014<0045:SDSRBO>2.0.CO;2
Satellite-derived surface radiation budget over the African continent. Part I: Estimation of downward solar irradiance and Albedo
Ba, MB; Frouin, R; Nicholson, SE; Dedieu, G
通讯作者Ba, MB
来源期刊JOURNAL OF CLIMATE
ISSN0894-8755
EISSN1520-0442
出版年2001
卷号14期号:1页码:45-58
英文摘要

Downward surface solar irradiance and albedo of the African continent are estimated from Meteosat B2 data at 30-km spatial resolution. The algorithm, based on Dedieu et al.’s approach, is verified against other satellite estimates and ground-based measurements. In the computations, the International Satellite Cloud Climatology Project’s (ISCCP) radiometric calibration is adjusted using the Libyan desert as a reference target of constant reflectance properties. Surface albedo is corrected for sun zenith angle effects, allowing for better detection of seasonal changes due to the vegetation cycle. The estimates obtained with Meteosat B2 data agree generally well with other satellite estimates, although biases of 20 W m(-2) (downward surface solar irradiance) and 0.15 (surface albedo) are obtained in some cases. There is evidence, from comparisons with surface measurements, that the clear-sky downward surface solar irradiance is overestimated over semiarid regions of Africa because of uncertainties in aerosol characteristics. In the Sahel region, where spatial albedo gradients are high, it is advantageous to use 30-km Meteosat B2 products instead of the current, coarser 280-km-resolution ISCCP products.


类型Article
语种英语
国家USA ; France
收录类别SCI-E
WOS记录号WOS:000166474100004
WOS关键词CLOUD CLIMATOLOGY PROJECT ; ECLATS FIELD EXPERIMENT ; SAHARAN AEROSOLS ; PHYSICAL MODEL ; DATA SETS ; VEGETATION ; SAHEL ; VARIABILITY ; METEOSAT ; ISCCP
WOS类目Meteorology & Atmospheric Sciences
WOS研究方向Meteorology & Atmospheric Sciences
来源机构French National Research Institute for Sustainable Development
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/141161
作者单位(1)Florida State Univ, Dept Meteorol, Tallahassee, FL 32306 USA;(2)Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA;(3)LERTS, CESBIO, Toulouse, France
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Ba, MB,Frouin, R,Nicholson, SE,et al. Satellite-derived surface radiation budget over the African continent. Part I: Estimation of downward solar irradiance and Albedo[J]. French National Research Institute for Sustainable Development,2001,14(1):45-58.
APA Ba, MB,Frouin, R,Nicholson, SE,&Dedieu, G.(2001).Satellite-derived surface radiation budget over the African continent. Part I: Estimation of downward solar irradiance and Albedo.JOURNAL OF CLIMATE,14(1),45-58.
MLA Ba, MB,et al."Satellite-derived surface radiation budget over the African continent. Part I: Estimation of downward solar irradiance and Albedo".JOURNAL OF CLIMATE 14.1(2001):45-58.
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