Arctic cloud chemistry: Can the Halogen 'explosion' oxidise material at air-water interface of cloud droplets.
The Arctic polar climate is strongly influenced by clouds. The oxidative processing of pollutants in Arctic clouds affects droplet size and optical properties, important climatic effects. Arctic clouds contain naturally occurring organic lipids forming organic films on the droplet. Arctic cloud chemistry unusually involves chlorine radical chemistry. Oxidation and removal of this film can cause cloud evaporation or new cloud formation. In this work we will study the kinetics of chlorine radicals with DPPC. Specifically we will (a) demonstrate that a common aqueous cloud oxidant, chlorine radical, can penetrate deep into the organic film and remove the film, (b) calculate the effect of the reaction on the hygroscopic properties of a cloud droplet and demonstrate removal of the organic film may cause a cloud to evaporate, (c) measure the kinetic rate constants for film oxidation and assess atmospheric relevance relative to ozone oxidation(d) Support a STFC/NERC CASE award PhD students initial studies.
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KING Martin; Richard A. Campbell; JONES Stephanie; MARKS Amelia; RENNIE Adrian R. and WARD Andy. (2012). Arctic cloud chemistry: Can the Halogen 'explosion' oxidise material at air-water interface of cloud droplets.. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-10-1192
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