Two opposing effects of absorbing aerosols on global-mean precipitation

Yi Ming, V. Ramaswamy, Geeta Persad

Research output: Contribution to journalArticle

108 Scopus citations

Abstract

Absorbing aerosols affect global-mean precipitation primarily in two ways. They give rise to stronger shortwave atmospheric heating, which acts to suppress precipitation. Depending on the top-of-the-atmosphere radiative flux change, they can also warm up the surface with a tendency to increase precipitation. Here, we present a theoretical framework that takes into account both effects, and apply it to analyze the hydrological responses to increased black carbon burden simulated with a general circulation model. It is found that the damping effect of atmospheric heating can outweigh the enhancing effect of surface warming, resulting in a net decrease in precipitation. The implications for moist convection and general circulation are discussed.

Original languageEnglish (US)
Article numberL13701
JournalGeophysical Research Letters
Volume37
Issue number13
DOIs
StatePublished - Jul 1 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

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