BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Ozone-alkene reactions: The role of trees in atmospheric chemistry
     - Dr Michael Newland\, University of East Anglia
DTSTART:20151123T141500Z
DTEND:20151123T151500Z
UID:TALK61597@talks.cam.ac.uk
CONTACT:Paul Griffiths
DESCRIPTION:Biogenic volatile organic compounds (VOCs) account for about 9
 0% of global VOC emissions and these are dominated by the unsaturated hydr
 ocarbons isoprene and the monoterpenes. Ozone is ubiquitous throughout the
  troposphere\, formed in the photolytic cycling of nitrogen oxides. The re
 action of alkenes with ozone in the atmosphere has in recent years been in
 creasingly recognised as playing a central role in tropospheric chemistry.
 \n\nAlkene-ozone reactions are a significant source of the most important 
 atmospheric oxidant\, the hydroxyl radical (OH). Recent work has focussed 
 on the production of Stabilized Criegee Intermediates (SCI) from these rea
 ctions. SCIs have been proposed to be important oxidants in the atmosphere
 \, potentially representing a significant additional oxidation route for S
 O2 to sulfate aerosol. This has implications for our understanding of this
  part of the climate system.\n\nAnother role of alkene ozonolysis is the e
 fficient formation of secondary organic aerosol. This can occur through th
 e formation of low volatility products via standard oxidation mechanisms\,
  via oligomerisation reactions\, or via the recently elucidated ‘ELVOC
 ’ auto-oxidation mechanism.
LOCATION:Unilever Lecture Theatre\, Department of Chemistry
END:VEVENT
END:VCALENDAR