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SUMMARY:Global modelling of tropospheric halogens and their impacts on air
  quality and climate - Dr Tomás Sherwen\, University of York
DTSTART:20170220T141500Z
DTEND:20170220T151500Z
UID:TALK70626@talks.cam.ac.uk
CONTACT:Paul Griffiths
DESCRIPTION:Halogens have established impacts on the air we breathe in the
  troposphere\, but our models of air-quality and climate models do not con
 sider them. Known impacts of halogens include destruction of ozone\, a key
  climate and air-quality gas\, and perturbation of HOx (OH+HO2) and NOx (N
 O+NO2) families. Over the past few years many new observations and new tro
 pospheric halogen sources have been reported. This talk will describe the 
 development of a global halogen simulation within the GEOS-Chem global che
 mical transport model (www.geos-chem.org) and explore the impacts on air-q
 uality and climate. First the significant gas-phase impacts on tropospheri
 c composition in present day are explored\, then implications for pre-indu
 strial ozone and modelled aerosol-phase iodine will be discussed.\n
LOCATION:Pfizer Lecture Theatre\, Department of Chemistry
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