Organic aerosol and global climate modelling: a review

[摘要] The present paper reviews existing knowledge with regard to Organic Aerosol(OA) of importance for global climate modelling and defines critical gapsneeded to reduce the involved uncertainties. All pieces required for therepresentation of OA in a global climate model are sketched out with specialattention to Secondary Organic Aerosol (SOA): The emission estimates ofprimary carbonaceous particles and SOA precursor gases are summarized. Theup-to-date understanding of the chemical formation and transformation ofcondensable organic material is outlined. Knowledge on the hygroscopicity ofOA and measurements of optical properties of the organic aerosolconstituents are summarized. The mechanisms of interactions of OA withclouds and dry and wet removal processes parameterisations in global modelsare outlined. This information is synthesized to provide a continuousanalysis of the flow from the emitted material to the atmosphere up to thepoint of the climate impact of the produced organic aerosol. The sources ofuncertainties at each step of this process are highlighted as areas thatrequire further studies.

[学科分类] 大气科学