Arising from discrete source points, the dust blows from northeast to southwest. Sand seas straddle the Mauritania-Algeria border, and many of the dust plumes arise in that region. In the southwest, over Mauritania, the plumes coalesce into a large mass of dust spanning more than 200 kilometers. Thinner plumes blow westward over Western Sahara toward the Atlantic coast.
NASA images courtesy Jeff Schmaltz, LANCE/EOSDIS MODIS Rapid Response Team at NASA GSFC. Caption by Michon Scott.
- Aqua - MODIS