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Global Aerosol Climatology Project (GACP)

Atmospheric aerosols, or fine particles, are one of the greatest sources of uncertainty in the interpretation and prediction of global climate change. Natural variations of aerosols, especially due to episodic eruptions of large volcanos, are recognized as a significant climate forcing, that is, a factor that alters the planetary radiation balance and thus may cause a global temperature change. In addition, aerosols from soil dust, biomass burning, and fossil fuel use are altering the amount and geographic distribution of atmospheric aerosols, and thus possibly affecting climate. The Global Aerosol Climatology Project (GACP) is concerned with the climate forcing due to changing aerosols, including both the direct radiative forcing by the aerosols and the indirect radiative forcing caused by effects of changing aerosols on cloud properties.

For More Information

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Points of Contact

Donald Anderson (Program Manager)
Sun-Earth System Division
NASA Science Mission Directorate
300 E Street, SW
Washington, DC 20546 USA

Joyce E. Penner (Science Team Leader)
Department of Atmospheric, Oceanic and Space Sciences
University of Michigan
2455 Hayward Street
Ann Arbor, MI 48109-2143

Michael Mishchenko (Project Manager)
2880 Broadway
New York, NY 10025