This map shows the abundance of airborne particulates, or aerosols,
over Southern Africa during the period August 14September 29, 2000.
Low particle concentrations are shown in shades of blue, and high
concentrations in shades of red. The results were generated from Multi-angle
Imaging Spectroradiometer (MISR)
imagery acquired over this time period, and processed using MISRs
automated software system. The approach for deriving aerosol amount
makes use of the variation of scene brightness and contrast as a
function of observation angle. Black areas over the land area correspond
to places where a result was not obtained, for example, due to the
presence of clouds.
Extensive burning of grass and shrubland for land management and
agriculture comprises a principal source of these aerosols. Vegetation
availability increases northward, hence the greater abundance of haze
and smoke in Angola and southern Zaire. The lower aerosol abundance
around Lesotho and southeastern South Africa is consistent with the
higher terrain elevations near the Drakensberg Mountains.