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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
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Volume 5, issue 3 | Copyright
Atmos. Chem. Phys., 5, 715-737, 2005
https://doi.org/10.5194/acp-5-715-2005
© Author(s) 2005. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  03 Mar 2005

03 Mar 2005

Global indirect aerosol effects: a review

U. Lohmann1 and J. Feichter2 U. Lohmann and J. Feichter
  • 1ETH Institute of Atmospheric and Climate Science, Schafmattstr. 30, CH-8093 Zurich, Switzerland
  • 2Max Planck Institute for Meteorology, Bundesstr. 53, D-20146 Hamburg, Germany

Abstract. Aerosols affect the climate system by changing cloud characteristics in many ways. They act as cloud condensation and ice nuclei, they may inhibit freezing and they could have an influence on the hydrological cycle. While the cloud albedo enhancement (Twomey effect) of warm clouds received most attention so far and traditionally is the only indirect aerosol forcing considered in transient climate simulations, here we discuss the multitude of effects. Different approaches how the climatic implications of these aerosol effects can be estimated globally as well as improvements that are needed in global climate models in order to better represent indirect aerosol effects are discussed in this paper.

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