Arid
DOI10.1023/A:1015730900622
Land cover, rainfall and land-surface albedo in West Africa
Fuller, DO; Ottke, C
通讯作者Fuller, DO
来源期刊CLIMATIC CHANGE
ISSN0165-0009
出版年2002
卷号54期号:1-2页码:181-204
英文摘要

Land surface albedo is an important variable in General Circulation Models (GCMs). When land cover is modified through anthropogenic land use, changes in land-surface albedo may produce atmospheric subsidence and reduction of rainfall. In this study we examined albedo time series and their relationships with rainfall, land cover, and population in West Africa. This particular region was selected because it has become a focal point in debates over biophysical impacts of desertification and deforestation. Our analyses revealed that albedo and rainfall were related only modestly at short time scales (monthly and annual) and that mean annual albedo values remained relatively stable from 1982-1989 over a wide range of climatic and vegetation zones in West Africa. The relationship between long-term mean rainfall and mean albedo was strong and curvilinear (r(2) = 0.802). The same was true for the relationship between percent tree cover and mean albedo (r(2) = 0.659). These results suggest that long-term climate patterns, which control vegetation type and canopy structure, have greater influence on albedo than short-term fluctuations in rainfall. Our results reinforce other recent studies based on satellite data that have questioned the extent and pervasiveness of desertification in West Africa.


类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000175947800008
WOS关键词BIOSPHERE-ATMOSPHERE INTERACTIONS ; NOAA-AVHRR ; FEEDBACK MECHANISM ; VEGETATION INDEX ; SATELLITE DATA ; SAHEL CLIMATE ; BURNED AREA ; TIME-SERIES ; DATA SET ; DESERTIFICATION
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/142338
作者单位(1)George Washington Univ, Dept Geog, Washington, DC 20052 USA
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Fuller, DO,Ottke, C. Land cover, rainfall and land-surface albedo in West Africa[J],2002,54(1-2):181-204.
APA Fuller, DO,&Ottke, C.(2002).Land cover, rainfall and land-surface albedo in West Africa.CLIMATIC CHANGE,54(1-2),181-204.
MLA Fuller, DO,et al."Land cover, rainfall and land-surface albedo in West Africa".CLIMATIC CHANGE 54.1-2(2002):181-204.
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