Monitoring East African vegetation using AVHRR data
作者:
C. O. JUSTICE,
B. N. HOLBEN,
M. D. GWYNNE,
期刊:
International Journal of Remote Sensing
(Taylor Available online 1986)
卷期:
Volume 7,
issue 11
页码: 1453-1474
ISSN:0143-1161
年代: 1986
DOI:10.1080/01431168608948948
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
NOAA Advanced Very High Resolution Radiometer satellite data are applied to regional vegetation monitoring in East Africa. Normalized Difference Vegetation Index (NDVI) data for a one-year period from May 1983 are used to examine the phenology of a range of vegetation types. The integrated NDVI data for the same period are compared with an ecoclimatic zone map of the region and show marked similarities. Particular emphasis is placed on quantifying the phenology of theAcacia Commiphora bushlands.Considerable variation was found in the phenology of the bushlands as determined by the satellite NDVI, and is explained through the high spatial variability in the distribution of rainfall and the resulting green-up of the vegetation. The relationship between rainfall and NDVI is further examined for selected meteorological stations existing within the bushland. A preliminary estimate is made of the length of growing season using an NDVI thresholding technique
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