Journal article
Retrievals of chlorine chemistry kinetic parameters from Antarctic ClO microwave radiometer measurements
S Kremser, R Schofield, GE Bodeker, BJ Connor, M Rex, J Barret, T Mooney, RJ Salawitch, T Canty, K Frieler, MP Chipperfield, U Langematz, W Feng
Atmospheric Chemistry and Physics | COPERNICUS GESELLSCHAFT MBH | Published : 2011
Abstract
Key kinetic parameters governing the partitioning of chlorine species in the Antarctic polar stratosphere were retrieved from 28 days of chlorine monoxide (ClO) microwave radiometer measurements made during the late winter/ early spring of 2005 at Scott Base (77.85° S, 166.75° E). During day-time the loss of the ClO dimer chlorine peroxide (ClOOCl) occurs mainly by photolysis. Some time after sunrise, a photochemical equilibrium is established and the ClO/ClOOCl partitioning is determined by the ratio of the photolysis frequency, J, and the dimer formation rate, kf. The values of J and kf from laboratory studies remain uncertain to a considerable extent, and as a complement to these ongoing ..
View full abstractGrants
Awarded by Natural Environment Research Council
Funding Acknowledgements
We thank Alan Parrish for his significant input in both the development of the ClO microwave radiometer and the initiation of the ground-based measurement program. We thank S. Wood, M. Kotkamp and Antarctica New Zealand for their help in maintaining the ClO microwave radiometer and their help in obtaining the ClO measurements. The ground-based measurement program is funded by NASA, grant NNX09AF40G. R. Schofield was funded by European Union (EU) project WaVES (MIF1-CT-2006-039646). The participation of R. Salawitch and T. Canty was supported by the NASA Aura and ACMAP programs. The SLIMCAT modelling work at Leeds was supported by NERC NCAS and the EU GEOMON project. S. Kremser thanks the German Academic Exchange Service (DAAD) for their support throughout the Doktorandenstipendium, which allowed this work to be conducted. We would like to thank Marc von Hobe and one anonymous reviewer for valuable comments and suggestions that contributed to a much improved manuscript following initial submission.