On the left side of this image are aerosol optical depths observed by the Moderate Resolution Imaging Spectroradiometer (MODIS) on April 13, 2001, and August 22, 2001. On the right side are simulations of the optical depths done by the Goddard Chemistry Aerosol Radiation and Transport (GOCART) model. In the images, red indicates fine model aerosols like smoke and pollution, while green indicates coarse mode aerosols such as sea salt and dust. The April images depict the movement of heavy dust and pollution from Asia to the Pacific, and the transport of dust from Africa to the Atlantic. In the August images, there are big smoke plumes over Southern African and South America.
April 26, 2010 4:00 AM PDT
Photo by: Mian Chin, NASA Science MissionDirectorate