HR: 0830h
AN: A41C-0703    [PDF]
TI: Chlorine activation during the SOLVE 2 / VINTERSOL campaign as measured by the Odin satellite
AU: * Ricaud, P
EM: ricaud@obs.u-bordeaux1.fr
AF: Observatoire de Bordeaux, 2, Rue de l'Observatoire, Floirac, 33270 France
AU: Murtagh, D
EM: Donal.Murtagh@rss.chalmers.se
AF: Chalmers University, Chalmers University, Gotenburg, 08 Sweden
AU: Urban, J
EM: urban@obs.u-bordeaux1.fr
AF: Observatoire de Bordeaux, 2, Rue de l'Observatoire, Floirac, 33270 France
AU: Ericksson, P
EM: Patrick.Ericksson@rss.chalmers.se
AF: Chalmers University, Chalmers University, Gotenburg, 08 Sweden
AU: Leflochmoen, E
EM: lefloch@obs.u-bordeaux1.fr
AF: Observatoire de Bordeaux, 2, Rue de l'Observatoire, Floirac, 33270 France
AU: Jimenez, C
EM: Carlos.Jimenez@rss.chalmers.se
AF: Chalmers University, Chalmers University, Gotenburg, 08 Sweden
AU: Lefevre, F
EM: lefevre@aero.jussieu.fr
AF: Service d'Aeronomiea, Universit‚ Paris VI-Jussieu, Paris, 75 France
AB: The Odin mini-satellite is a Swedish-led project funded jointly by Sweden, Canada, France and Finland. It was placed into a 600 km sun-synchronous, terminator orbit by a START-1 rocket on 20 February 2001 from Svobodny, far eastern Russia. Odin contains two instruments. A UV-Visible and Infra-Red instrument, the Optical Spectrograph and Infrared Imaging System (OSIRIS), is capable of detecting O3 and NO2. Odin also carries the Sub-Millimeter Radiometer (SMR) that can simultaneously measure O3, ClO and N2O in the frequency domain 501.18-502.38 GHz, together with HNO3 at 544.20-545.00 GHz both in the stratosphere and in the mesosphere. During the SOLVE II/VINTERSOL Campaign, the SMR instrument has detected the first traces of chlorine activation (volume mixing ratios greater than 0.2 ppbv) beginning of December 2002 from 425 K to 550 K (heights from 17 to 25 km, respectively) at the edge of the inner vortex. The maximum of activation occurred mid-January 2003 when ClO peaked around 1.2 ppbv at 465 K although the solar zenith angle of the measurements was about 100 deg, i.e. for night-time conditions. After mid-March 2003, SMR shows a complete chlorine deactivation at least to within 0.2 ppbv.
UR: http://www.obs.u-bordeaux1.fr
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0322 Constituent sources and sinks
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting