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Earth Observatory Aerosol Optical Depth

Published by National Aeronautics and Space Administration | National Aeronautics and Space Administration | Catalog Last Checked: August 04, 2025 at 02:16 PM | Dataset Last Updated: March 31, 2025
Tiny solid and liquid particles suspended in the atmosphere are called aerosols. Windblown dust, sea salts, volcanic ash, smoke from wildfires, and pollution from factories are all examples of aerosols. Depending upon their size, type, and location, aerosols can either cool the surface, or warm it. They can help clouds to form, or they can inhibit cloud formation. And if inhaled, some aerosols can be harmful to people’s health.

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