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SUMMARY:The role of glassy aerosol in cirrus ice cloud formation - Theodor
 e Wilson\, University of Leeds
DTSTART:20111114T141500Z
DTEND:20111114T150000Z
UID:TALK34577@talks.cam.ac.uk
CONTACT:Dr Alex Archibald
DESCRIPTION:An increasing body of evidence suggests that some atmospheric 
 aerosol exist in a glassy or other amorphous solid state. The physical sta
 te of aerosol affects the way in which they nucleate ice. This can change 
 cirrus cloud ice particle size and number\, which in turn impacts the clou
 ds radiative properties. In this talk\, experiments performed at the AIDA 
 cloud simulation chamber are presented which show that glassy aerosols cat
 alyse ice formation by nucleating ice heterogeneously in the deposition mo
 de at temperatures up to ~220 K. Using a one dimensional model\, we show t
 hat ice nucleation by glassy aerosol affects cirrus cloud ice particle siz
 e and number.
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
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