Vegetation Index of Ghana, Togo, Benin and Nigeria10.3N 4.6E
This FAPAR image stretches along the coast of Africa, from Ghana (left), across Togo and Benin, to Nigeria (right). FAPAR stands for Fraction of Absorbed Photosynthetically Active Radiation, which corresponds to the area’s vegetation index.
In FAPAR images, the color spectrum over land runs from red (1.0), to green, to yellow and white (0.0), while bodies of water, such as Lake Volta in Ghana (lower left) and Lake Kainji in Nigeria (center), generally appear blue.
High photosynthetic activity is present in dark red regions, such as those along the coast here. Green areas are also productive. Yellow to white areas, on the other hand, indicate a low degree of photosynthetic activity. Here, the more photosynthetically active green areas gradually give way to less activa yellow and white zones as one approaches the drier Sahel, south of the Sahara desert.