HR: 1340h
AN: A13D-0985    [Abstracts]
TI: Towards a Better Quantitative Understanding of Polar Stratospheric Ozone Loss
AU: * Frieler, K
EM: kfrieler@awi-potsdam.de
AF: Alfred Wegener Institute for Polar and Marine Research, Telegrafenberg A43/A45, Potsdam, 14473 Germany
AU: Canty, T
EM: tcanty@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Mail Stop 182-601, Pasadena, CA CA 91109 United States
AU: Dorf, M
EM: marcel.dorf@iup.uni-heidelberg.de
AF: University of Heidelberg, Institut fuer Umweltphysik, INF 229, Heidelberg, 69120 Germany
AU: Godin-Beekmann, S
EM: sophie.godin@aero.jussieu.fr
AF: Service d'Aeronomie-CNRS, Institut Pierre Simon Laplace, UPMC - B102 4 Place Jussieu, Paris, 75252 Germany
AU: Lehmann, R
EM: rlehmann@awi-potsdam.de
AF: Alfred Wegener Institute for Polar and Marine Research, Telegrafenberg A43/A45, Potsdam, 14473 Germany
AU: Pfeilsticker, K
EM: klaus.pfeilsticker@iup.uni-heidelberg.de
AF: University of Heidelberg, Institut fuer Umweltphysik, INF 229, Heidelberg, 69120 Germany
AU: Rex, M
EM: mrex@awi-potsdam.de
AF: Alfred Wegener Institute for Polar and Marine Research, Telegrafenberg A43/A45, Potsdam, 14473 Germany
AU: Salawitch, R
EM: rjs@caesar.jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Mail Stop 182-601, Pasadena, CA CA 91109 United States
AU: Stimpfle, R
EM: stimpfle@huarp.harvard.edu
AF: Harvard University, Department of Chemistry, 12 Oxford Street, Link Bldg., Cambridge, MA MA 02138 United States
AU: Streibel, M
EM: mstreibel@awi-potsdam.de
AF: Alfred Wegener Institute for Polar and Marine Research, Telegrafenberg A43/A45, Potsdam, 14473 Germany
AU: von der Gathen, P
EM: gathen@awi-potsdam.de
AF: Alfred Wegener Institute for Polar and Marine Research, Telegrafenberg A43/A45, Potsdam, 14473 Germany
AU: Weisenstein, D
EM: weisenstein@aer.com
AF: Atmospheric and Environmental Research, Inc., 131 Hartwell Avenue, Lexington, MA 02421-3126 United States
AB: Numerous previous studies have shown that observed large ozone loss rates in cold Arctic Januaries cannot be explained with current understanding of the loss processes (currently recommended reaction kinetics and standard assumptions about total stratospheric chlorine and bromine). Data collected during recent field campaigns suggest faster rates of photolysis and thermal decomposition of ClOOCl and have shown levels of BrO that indicate stratospheric bromine is larger than previously assumed. Here, we show that a model that accounts for these changes largely resolves the January Arctic ozone loss problem. Considering the winter 1999/2000, the model provides for the first time consistency between observed Arctic ozone loss rates throughout winter and observed levels of ClO, ClOOCl, and BrO. In addition, we will show the results of a Bayesian Monte Carlo Analysis that allows to combine the information about reaction kinetics from different sources where the weight of each source is solely determined by its individual uncertainty. Here, we use the JPL-02 recommendations based on laboratory measurements in combination with the information from stratospheric measurements to re-evaluate the uncertainties associated with our description of the polar ozone loss cycles.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0317 Chemical kinetic and photochemical properties
DE: 0340 Middle atmosphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005