Monitoring the grasslands of the Sahel 1984-1985
作者:
C. J. TUCKER,
C. O. JUSTICE,
S. D. PRINCE,
期刊:
International Journal of Remote Sensing
(Taylor Available online 1986)
卷期:
Volume 7,
issue 11
页码: 1571-1581
ISSN:0143-1161
年代: 1986
DOI:10.1080/01431168608948954
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Normalized difference vegetation index data obtained from polar-orbiting meteorological satellites were used to compare the growing or rainy seasons of 1984 and 1985 for the Sahelian zone of Africa. A substantial difference was found between these two years, with 1985 generally having higher normalized difference vegetation index values indicating higher levels of primary production in 1985 than in 1984. 1 km data were compared for Senegal, Mali, Niger and Sudan, and 7 km data were compared for sub-Saharan Africa. The qualitative comparison of these data suggests the use of similar data to assist in centralized monitoring of rangeland conditions, to identify areas of deficiencies in primary production and provide synoptic information in support of regional drought monitoring
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