Blowing dust swirled over (top left to bottom) Egypt, Sudan, and Eritrea, and the Red Sea (center) on July 16, 2004. Summertime dust storms such as these have a significant cooling influence on regional temperatures there and to a lesser extent on temperatures across the Northern Hemisphere. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASAâs Terra satellite captured this scene.
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NASA image courtesy Jacques Descloitres, MODIS Rapid Response Team at GSFC












