BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Interaction between gaseous halogen oxides and other radical famil
 ies - Dr David Rowley\, University College\, London
DTSTART:20170213T141500Z
DTEND:20170213T151500Z
UID:TALK70625@talks.cam.ac.uk
CONTACT:Valerio Ferracci
DESCRIPTION:Halogen oxide radicals\, XO (where X = Cl\, Br\, I)\, are know
 n to self- and cross-interact in cycles leading to catalytic depletion of 
 atmospheric ozone in both the troposphere and the stratosphere. The former
  affects the atmospheric oxidative capacity\, and hence the lifetime of po
 llutants including greenhouse gases. This perturbation of oxidants may als
 o have implications for regional air quality. The latter\, stratospheric o
 zone loss\, affects solar UV radiation.\n\nBut\, whilst the self- and cros
 s-reactions of halogen oxide free radicals are important\, their interacti
 ons with other species\, notably peroxy radicals formed through HOx and VO
 C degradation chemistry are far less well characterised. These reactions o
 f XO + RO2 (R = H or CH3) are key\, since they control the effect of XO ch
 emistry on atmospheric ozone in regions where the halogen oxide concentrat
 ion is not especially elevated.\n\nThis talk will show results from some o
 f our recent studies of the XO + RO2 reactions in the laboratory. Aside fr
 om the fundamental kinetics of these processes\, we have also assessed the
  branching ratios\, which dictate the extent that these reactions contribu
 te to the destruction of ozone and their subsequent consequences.\n\n
LOCATION:Pfizer Lecture Theatre\, Department of Chemistry
END:VEVENT
END:VCALENDAR