HR: 1340h
AN: A13D-0982    [Abstracts]
TI: Comparison of Arctic Ozone Loss Observations during the 2004-2005 Winter
AU: * Singleton, C S
EM: shaw@lasp.colorado.edu
AF: Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder UCB 392, Boulder, CO 80309-0392 United States
AU: Randall, C E
EM: Cora.Randall@lasp.colorado.edu
AF: Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder UCB 392, Boulder, CO 80309-0392 United States
AU: Harvey, V L
EM: harvey@aura.colorado.edu
AF: Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder UCB 392, Boulder, CO 80309-0392 United States
AU: Chipperfield, M P
EM: martyn@env.leeds.ac.uk
AF: Institute for Atmospheric Science, School of Earth and Environment University of Leeds, Leeds, LS2 9JT United Kingdom
AU: Feng, W
EM: fengwh@env.leeds.ac.uk
AF: Institute for Atmospheric Science, School of Earth and Environment University of Leeds, Leeds, LS2 9JT United Kingdom
AU: Manney, G L
EM: manney@mls.jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 United States
AU: Manney, G L
EM: manney@mls.jpl.nasa.gov
AF: Department of Physics, New Mexico Institute of Mining and Technology, Socorro, NM 87801 United States
AU: Hoppel, K W
EM: karl.hoppel@nrl.navy.mil
AF: Naval Research Laboratory, Remote Sensing Physics Branch, Washington, DC 20375-5351 United States
AU: Froidevaux, L
EM: lucien@mls.jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 United States
AU: Bernath, P
EM: bernath@uwaterloo.ca
AF: Department of Chemistry, University of Waterloo, Waterloo, Ont N2L 3G1 Canada
AU: Boone, C
EM: cboone@sciborg.uwaterloo.ca
AF: Department of Chemistry, University of Waterloo, Waterloo, Ont N2L 3G1 Canada
AU: Walker, K
EM: kwalker@acebox.uwaterloo.ca
AF: Department of Chemistry, University of Waterloo, Waterloo, Ont N2L 3G1 Canada
AU: MacKenzie, I
EM: iamack@mail.glg.ed.ac.uk
AF: Institute of Atmospheric and Environmental Science, The University of Edinburgh, Edinburgh, EH9 3J2 United Kingdom
AB: The Arctic lower stratosphere during the 2004-2005 winter was exceptionally cold, with high potential for polar stratospheric cloud formation and prime conditions for ozone loss. Previous model simulations have shown that ozone in the University of Leeds' SLIMCAT global three-dimensional chemical transport model (CTM) agrees quite well with Polar Ozone and Aerosol Measurement (POAM) III observations made during the earlier 2002-2003 winter. For the first time, 2004-2005 Arctic ozone loss calculations using Earth Observing System Microwave Limb Sounder (EOS MLS), Atmospheric Chemistry Experiment Fourier Transform Spectrometer (ACE-FTS), and POAM III observations will be compared to simulations from the improved SLIMCAT CTM. The meteorological conditions during the 2004-2005 winter were different from 2002-2003 in that 2004-2005 temperatures remained low through early March, unlike conditions in 2002-2003 where two stratospheric warming events caused an increase in temperatures after December. Comparisons between observed and modeled chemical species and dynamical tracers such as O3, H2O, ClONO2, HCl, CH4, and N2O will be shown. In addition, we will compare estimates of ozone loss using different analysis techniques, such as the CTM passive subtraction, tracer correlation, and vortex average. Finally, POAM III, ACE-FTS, and EOS MLS measure stratospheric ozone with vertical resolutions of 1 km, 3-4 km, and 4-5 km, respectively. This work will examine the sensitivity of ozone loss inferences to the vertical resolution of the ozone profiles.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0340 Middle atmosphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005