This map shows the global distribution of aerosols in August 2010, and the proportion of those aerosols that are large or small.
Image of the Day Atmosphere Human Presence
Solid particles and liquid droplets in the air come in a range of sizes, but those smaller than 2.5 micrometers pose the greatest risk to human health.
Image of the Day Atmosphere
This series of images, derived from a computer model, shows wind-blown dust from North Africa as it spread over the Atlantic Ocean on July 1, 2009.
Image of the Day
Image of the Day Atmosphere Dust and Haze
Patches of gray-white haze covered eastern China and snaked east to Korea on October 2, 2009.
Atmosphere Dust and Haze
Dust and Haze