The trend of annual average *NDVI 1982-2004 is shown in the map.
The latitudal shift in vegetation over the last 2 decades was
calculated as the N-S shift in the isoline for annual average *NDVI = 30.
The figure shows the N-S shift in both *NDVI and rainfall over
Niger and Nigeria. Click here or under the map to see trends for
Mauritania and Senegal, or Burkina Faso and Mali.


