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SUMMARY:The reactivity\, hygroscopicity and volatility of atmospheric aero
 sols - Dr Francis Pope (University of Cambridge)
DTSTART:20101018T131500Z
DTEND:20101018T141500Z
UID:TALK25911@talks.cam.ac.uk
CONTACT:Dr Alex Archibald
DESCRIPTION:Atmospheric aerosols are of great importance in the Earth’s 
 atmospheric system.  They are central to our understanding of the climate\
 , where they both directly and indirectly interact with solar radiation.  
 Directly they can scatter and absorb radiation.  Indirectly\, they form cl
 oud condensation nuclei\, and ice nuclei\, which dictate the formation of 
 clouds and therefore further perturb the albedo of the Earth.  Aerosols al
 so provide surfaces and volumes for important atmospheric reactions to occ
 ur upon.  Aerosols are also implicated in human health issues.\n\nIn this 
 talk I will highlight my work from the last two years looking into how the
  physical characteristics of aerosols change in a dynamic atmospheric envi
 ronment.  In particular I will discuss how changes in atmospheric temperat
 ure\, relative humidity and chemical oxidant concentration can perturb aer
 osol composition and size.  A variety of laboratory and modelling tools ha
 ve used for this investigation including electrodynamic balance\, aerosol 
 flow tube\, environmental scanning electron microscope\, and high resoluti
 on mass spectrometry.  Furthermore I will discuss recent work on the role 
 of pollen as aerosol and their potential role as giant cloud condensation 
 nuclei.\n
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
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