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SUMMARY:Oil Palms\, Alkenes\, SCIs and Ozone: New measurement approaches t
 o sidestep atmospheric chemical complexity - Bill Bloss (Birmingham)
DTSTART:20150309T130000Z
DTEND:20150309T140000Z
UID:TALK57568@talks.cam.ac.uk
CONTACT:Doris Allen
DESCRIPTION:Ozone is an important air pollutant\, harmful to human health\
 , agricultural crops and vegetation\; the main precursor to the atmospheri
 c oxidants which initiate the degradation of most reactive gases emitted t
 o the atmosphere\, and is an important greenhouse gas in its own right.  T
 he capacity to understand\, predict and so to manage tropospheric ozone le
 vels is a key goal for atmospheric science research.  This goal is hard to
  achieve\, as ozone is a secondary pollutant\, formed in the atmosphere fr
 om the complex oxidation of VOCs in the presence of NOx and sunlight\, and
  a combination of in situ chemical processes\, deposition and transport go
 vern ozone levels.  Uncertainties in all of these factors affect the accur
 acy of numerical models used to predict current and future ozone levels.\n
 This talk briefly presents results from complementary experimental approac
 hes (large atmospheric simulation chambers\, and field process studies) wh
 ich aim to provide new understanding of ozone formation in complex atmosph
 eric systems\, through an integrated process view :\n\n(a)	The impact of a
  new biogenic VOC\, Methyl Chavicol\, whose emissions are growing with the
  expansion of Oil Palm plantations\, upon ozone formation\n\n(b)	The impor
 tance of Criegee Intermediates\, formed from alkene-ozone reactions\, as 
 “new” atmospheric oxidants alongside species such as OH radicals. \n\n
 (c)	 A new approach for the direct measurement of local chemical ozone pro
 duction rates in the ambient atmospheric boundary layer.\n
LOCATION:MR5\, Centre for Mathematical Sciences
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