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Monitoring East African vegetation using AVHRR dataNOAA 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 the Acacia 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.
Document ID
19870037507
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Justice, C. O.
(Maryland, University College Park, United States)
Holben, B. N.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Gwynne, M. D.
(UN, Environment Program, Global Environmental Monitoring System Nairobi, Kenya)
Date Acquired
August 13, 2013
Publication Date
November 1, 1986
Publication Information
Publication: International Journal of Remote Sensing
Volume: 7
ISSN: 0143-1161
Subject Category
Earth Resources And Remote Sensing
Accession Number
87A24781
Funding Number(s)
CONTRACT_GRANT: NAG5-399
Distribution Limits
Public
Copyright
Other

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