P3.16
Disaggregating Land Cover Change and Climate Change in the West African Sahel using Landsat Mosaics and AVHRR NDVI from 1981-2004
Molly. E. Brown, NASA, Greenbelt, MD; and C. Neigh and C. J. Tucker
Land use change in the Sahel is a topic of ongoing concern. The impact of increasing population pressure and a changing rainfall regime on land cover and land use is still being debated. By using long time series coarse resolution rainfall and NDVI data in conjunction with fine-spatial resolution Landsat data, we hope to disaggregate land cover change from climate change during the past quarter century. This is done by first finding the trends in AVHRR normalized difference vegetative index and rainfall datasets from 1981 to 2004, and comparing them to change maps from eight Landsat Mosaic tiles from the 1990s and 2000s. Selected locations that show change in both the AVHRR-rainfall data and the Landsat Mosaic data will be further examined using the original Landsat orthorectified data from the Geocover database. By disaggregating land cover change areas from areas with changing climate, a map can be created that identifies regions with changing climate and static land cover, regions with land cover change coupled with a change in climate, and regions with neither land cover change or climate change.
Poster Session 3, Land Atmosphere Interactions Posters
Wednesday, 12 January 2005, 2:30 PM-4:00 PM
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