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Published September 28, 2004 | Published
Journal Article Open

Organic aerosol and global climate modelling: a review


The present paper reviews existing knowledge with regard to Organic Aerosol (OA) of importance for global climate modelling and defines critical gaps needed to reduce the involved uncertainties. All pieces required for the representation of OA in a global climate model are sketched out with special attention to Secondary Organic Aerosol (SOA): The emission estimates of primary carbonaceous particles and SOA precursor gases are summarized. The up-to-date understanding of the chemical formation and transformation of condensable organic material is outlined. Knowledge on the hygroscopicity of OA and measurements of optical properties of the organic aerosol constituents are summarized. The mechanisms of interactions of OA with clouds and dry and wet removal processes parameterisations in global models are outlined. This information is synthesized to provide a continuous analysis of the flow from the emitted material to the atmosphere up to the point of the climate impact of the produced organic aerosol. The sources of uncertainties at each step of this process are highlighted as areas that require further studies.

Additional Information

All papers, comments, figures and other material published by this journal is copyrighted by the author(s) and, unless otherwise noted, is licenced under the Creative Commons Attribution - NonCommercial - ShareAlike Licence . Received: 3 August 2004 – Accepted: 16 August 2004 – Published: 28 September 2004. This work has been supported by the EU project PHOENICS: EVK2-CT2001-00098. We thank all participants of the PHOENICS workshop on Organic Aerosol in Belgirate in Sept. 2003 for communication of their results and fruitful discussions. B. Ervens acknowledges support by the NOAA Office of Global programs. The authors are looking forward to constructive comments on the manuscript during the interactive phase of ACPD discussion.

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