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SUMMARY:Formation and Transformation of Secondary Organic Aerosol - Prof. 
 Urs Baltensperger\, Laboratory of Atmospheric Chemistry Paul Scherrer Inst
 itut\, Switzerlzand.
DTSTART:20090205T140000Z
DTEND:20090205T150000Z
UID:TALK15479@talks.cam.ac.uk
CONTACT:Dr Francis Pope
DESCRIPTION:Organic aerosols (OA) comprise a large fraction of the total a
 tmospheric aerosol. There is considerable uncertainty about the fractions 
 of primary and secondary organic aerosol (POA and SOA\, respectively). In 
 addition\, models generally underestimate the measured ambient OA concentr
 ations by factors of up to 100. A major reason for this discrepancy is our
  incomplete understanding of the formation and transformation of secondary
  organic aerosol. Smog chambers are a highly suitable means to obtain the 
 required knowledge on SOA. This talk will present an overview of the resea
 rch performed at the PSI smog chamber. Nucleation as well as various aging
  processes will be covered. 
LOCATION:Pfizer Lecture Theatre\,  Department of Chemistry
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