Journal
ANNUAL REVIEW OF ENVIRONMENT AND RESOURCES, VOL 36
Volume 36, Issue -, Pages 45-74Publisher
ANNUAL REVIEWS
DOI: 10.1146/annurev-environ-042009-094507
Keywords
aerosols; climate change
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Funding
- Div Atmospheric & Geospace Sciences [0929282] Funding Source: National Science Foundation
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Aerosols are suspensions of solid and/or liquid particles in the atmosphere and modify atmospheric radiative fluxes and chemistry. Aerosols move mass from one part of the earth system to other parts of the earth system, thereby modifying biogeochemistry and the snow surface albedo. This paper reviews our understanding of the impacts of aerosols on climate through direct radiative changes, aerosol-cloud interactions (indirect effects), atmospheric chemistry, snow albedo, and land and ocean biogeochemistry. Aerosols play an important role in the preindustrial (natural) climate system and have been perturbed substantially over the anthropocene, often directly by human activity. The most important impacts of aerosols, in terms of climate forcing, are from the direct and indirect effects, with large uncertainties. Similarly large impacts of aerosols on land and ocean biogeochemistry have been estimated, but these have larger uncertainties.
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