HR: 11:20h
AN: A32C-04    [Abstracts]
TI: A Study of Stratospheric Chlorine Partitioning in the Winter Polar Vortices Based on New Satellite Measurements and Modeling
AU: * Santee, M L
EM: mls@mls.jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: MacKenzie, I A
EM: iamack@mail.glg.ed.ac.uk
AF: University of Edinburgh, Department of Meteorology, Edinburgh, EH9 3JZ United Kingdom
AU: Manney, G L
EM: manney@mls.jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Manney, G L
EM: manney@mls.jpl.nasa.gov
AF: New Mexico Institute of Mining and Technology, Department of Physics, Socorro, NM 87801
AU: Bernath, P
EM: bernath@uwaterloo.ca
AF: University of Waterloo, Department of Chemistry, Waterloo, ON N2L 3G1 Canada
AU: Nassar, R
EM: ray@acebox.uwaterloo.ca
AF: University of Waterloo, Department of Chemistry, Waterloo, ON N2L 3G1 Canada
AU: Walker, K
EM: kwalker@acebox.uwaterloo.ca
AF: University of Waterloo, Department of Chemistry, Waterloo, ON N2L 3G1 Canada
AU: Boone, C
EM: cboone@acebox.uwaterloo.ca
AF: University of Waterloo, Department of Chemistry, Waterloo, ON N2L 3G1 Canada
AU: Chipperfield, M P
EM: martyn@env.leeds.ac.uk
AF: University of Leeds, The Environment Centre, Leeds, LS2 9JT United Kingdom
AU: Livesey, N J
EM: livesey@mls.jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Froidevaux, L
EM: lucien@mls.jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Read, W G
EM: bill@mls.jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AU: Waters, J W
EM: joe@mls.jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109 United States
AB: The Microwave Limb Sounder (MLS) onboard NASA's Earth Observing System (EOS) Aura satellite measures several key species involved in stratospheric ozone chemistry, including the first simultaneous daily global profiles of HCl and ClO. Here we examine chlorine partitioning during the deactivation phase of the 2004 Antarctic winter and throughout the entire 2004--2005 Arctic winter, which was exceptionally cold in the lower stratosphere. Measurements of ClONO2 from the Atmospheric Chemistry Experiment Fourier transform spectrometer (ACE-FTS) on the Canadian SCISAT-1 are also analyzed. Interhemispheric differences in the evolution of reactive and reservoir chlorine species in the polar vortices are explored throughout the lower stratosphere (400--750 K). In addition, theoretical understanding is tested by comparing the satellite measurements to near real time runs of the SLIMCAT 3D chemical transport model, sampled at the same location and local time as the EOS MLS measurements.
DE: 0340 Middle atmosphere: composition and chemistry
DE: 0341 Middle atmosphere: constituent transport and chemistry (3334)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005