HR: 11:20h
AN: A22A-04    [Abstracts]
TI: Using ACE-FTS Measurements to Investigate Partitioning Between the Inorganic Chlorine Reservoirs, HCl and ClONO2, During the 2005 Arctic Winter
AU: Dufour, G
EM: gdufour@acebox.uwaterloo.ca
AF: Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
AU: Nassar, R
EM: ray@acebox.uwaterloo.ca
AF: Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
AU: Boone, C
EM: cboone@acebox.uwaterloo.ca
AF: Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
AU: Skelton, R
EM: skelton@brutus.uwaterloo.ca
AF: Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
AU: * Walker, K A
EM: kwalker@uwaterloo.ca
AF: Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
AU: Bernath, P F
EM: bernath@uwaterloo.ca
AF: Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
AU: Rinsland, C
EM: c.p.rinsland@larc.nasa.gov
AF: NASA Langley Research Center, Mail Stop 401A, Hampton, VA 23681-3142 United States
AU: Semeniuk, K
EM: kirill@nimbus.yorku.ca
AF: Department of Space Science and Engineering, York University, 4700 Keele Street, Toronto, ON M3J 1P3 Canada
AU: Jin, J J
EM: jin@nimbus.yorku.ca
AF: Department of Space Science and Engineering, York University, 4700 Keele Street, Toronto, ON M3J 1P3 Canada
AU: McConnell, J C
EM: jack@nimbus.yorku.ca
AF: Department of Space Science and Engineering, York University, 4700 Keele Street, Toronto, ON M3J 1P3 Canada
AU: Manney, G L
EM: manney@mls.jpl.nasa.gov
AF: NASA 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 United States
AB: During January to March 2005, the Atmospheric Chemistry Experiment high resolution Fourier transform spectrometer (ACE-FTS) investigated changes occurring in the Arctic (50-80 °N) lower stratosphere under very cold winter conditions. ACE is a Canadian scientific satellite mission to perform remote sensing measurements of the Earth's atmosphere using solar occultation. The satellite, also known as SCISAT-1, was launched on August 12, 2003 into a 650 km altitude, 74 degree circular orbit. This paper focuses on the partitioning between the inorganic chlorine reservoirs, HCl and ClONO₂ and their activation into ClO. As far as we know, the ACE-FTS is the first space-borne instrument capable of measuring HCl, ClONO₂, and ClO simultaneously. The simultaneous measurement of these species by the ACE-FTS provides the data needed to follow chlorine activation during the Arctic winter and the recovery of the Cl-reservoir species ClONO₂ and HCl. The time evolution of HCl, ClONO₂ and ClO as well as the partitioning between the two reservoir molecules agree well with previous observations and with our current understanding of chlorine activation during Arctic winter. The results of a chemical box model are also compared with the ACE-FTS measurements and are generally consistent with the measurements.
DE: 0340 Middle atmosphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005