HR: 12:05h
AN: A32C-07    [Abstracts]
TI: Severe Arctic Ozone loss in the Winter 2004-2005 using ACE and Odin Measurements
AU: Jin, J J
EM: jianjun@yorku.ca
AF: Department of Earth and Space Science and Engineering, York University, 4700 Keele Street, Toronto, ON M3J 1P3 Canada
AU: Semeniuk, K
A32C-07 AF: Department of Earth and Space Science and Engineering, York University, 4700 Keele Street, Toronto, ON M3J 1P3 Canada
AU: Jonsson, A I
A32C-07 AF: Department of Earth and Space Science and Engineering, York University, 4700 Keele Street, Toronto, ON M3J 1P3 Canada
AU: Beagley, S R
A32C-07 AF: Department of Earth and Space Science and Engineering, York University, 4700 Keele Street, Toronto, ON M3J 1P3 Canada
AU: * McConnell, J C
A32C-07 AF: Department of Earth and Space Science and Engineering, York University, 4700 Keele Street, Toronto, ON M3J 1P3 Canada
AU: Dufour, G
A32C-07 AF: Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
AU: Nassar, R
A32C-07 AF: Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
AU: Walker, K A
A32C-07 AF: Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
AU: Boone, C D
A32C-07 AF: Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
AU: Bernath, P F
A32C-07 AF: Department of Chemistry, University of Waterloo, 200 University Avenue West, Waterloo, ON N2L 3G1 Canada
AU: Rinsland, C P
A32C-07 AF: NASA Langley Research Center, Mail Stop 401A, 21 Langley Boulevard, Hampton, VA 23681-2199 United States
AU: Urban, J
A32C-07 AF: Department of Radio and Space Science, Chalmers University of Technology, G”teborg, SE-41296 Sweden
AU: Murtagh, D
A32C-07 AF: Department of Radio and Space Science, Chalmers University of Technology, G”teborg, SE-41296 Sweden
AU: Petelina, S V
A32C-07 AF: Institute of Space and Atmospheric Studies, Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, SK S7N 5E2 Canada
AB: The Atmospheric Chemistry Experiment (ACE) is a Canadian satellite mission (SCISAT-1) for remote sensing of the Earth's atmosphere which was launched on 12 August 2003 with a primary mission to study polar ozone loss in the winter and spring seasons. Measurements from it and the Odin satellite are analyzed along with modeling for the Arctic ozone loss in the winter 2004-2005. The measurements show the winter was unusually cold and there was ozone depletion. The cold pool developed in November and stabilized around the North Pole before shifting towards Greenland and northern Europe in early February. The air began to warm after mid-March. As a result of the heterogeneous reactions on PSC particles extremely small HCl and ClONO2 mixing ratios were observed in January and February with concomitantly large values of ClO. Small NO and NO2 mixing ratios were also observed in the vortex. However, consistent with previous observations, no obvious dehydration was observed by ACE-FTS suggesting that the heterogeneous reactions and denitrification did not involve ice particles. A correlation method is employed to derive the chemical ozone loss from January to March 2005. By early March, the total column loss was 82 ± 12 DU and the maximum ozone was 1.5 ppmv occurring between the 430 K and 480 K isentropes inside the vortex, when mixing between intravortex and extravortex is excluded. The ozone loss ceased at mid-March, which was earlier than in previous cold winters. The total column ozone loss is comparable to the winter of 1999-2000 but smaller than the loss in the winter of 1995-1996. Comparisons are also made between the results from satellites and modeling.
DE: 0340 Middle atmosphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005