HR: 0830h
AN: A41C-0702    [PDF]
TI: Odin/SMR Limb Observations of Stratospheric Trace Gases During the 2002-03 Northern Hemisphere Winter
AU: * Urban, J
EM: urban@obs.u-bordeaux1.fr
AF: Observatoire Aquitain des Sciences de l'Univers, L3AB, 2, rue de l'Observatoire, B.P. 89, Floirac, 33270 France
AU: Lauti\'e, N
AF: Global Environmental Measurements Group, Chalmers University of Technology, G”teborg, 412 96 Sweden
AU: Le Flochmo\"en, E
AF: Observatoire Aquitain des Sciences de l'Univers, L3AB, 2, rue de l'Observatoire, B.P. 89, Floirac, 33270 France
AU: Dupuy, E
AF: Observatoire Aquitain des Sciences de l'Univers, L3AB, 2, rue de l'Observatoire, B.P. 89, Floirac, 33270 France
AU: Eriksson, P
AF: Global Environmental Measurements Group, Chalmers University of Technology, G”teborg, 412 96 Sweden
AU: Jimenez, C
AF: Global Environmental Measurements Group, Chalmers University of Technology, G”teborg, 412 96 Sweden
AU: de La No\"e, J
AF: Observatoire Aquitain des Sciences de l'Univers, L3AB, 2, rue de l'Observatoire, B.P. 89, Floirac, 33270 France
AU: Murtagh, D
AF: Global Environmental Measurements Group, Chalmers University of Technology, G”teborg, 412 96 Sweden
AU: Olberg, M
AF: Global Environmental Measurements Group, Chalmers University of Technology, G”teborg, 412 96 Sweden
AU: Ricaud, P
AF: Observatoire Aquitain des Sciences de l'Univers, L3AB, 2, rue de l'Observatoire, B.P. 89, Floirac, 33270 France
AU: Frisk, U
AF: Swedish Space Corporation, P O Box 4207, Solna, 171 04 Sweden
AB: The Sub-Millimeter Radiometer (SMR) on board the Odin satellite, launched in February 2001, employs 4 tunable single-sideband Schottky-diode heterodyne receivers in the $\sim$\,485-580\,GHz spectral range and a 1\,m telescope for passive observations of thermal emissions originating from the Earths limb. Spectra are recorded using 2 high resolution auto-correlator spectrometers. Measurements are performed in a time sharing mode with astronomical observations. In aeronomy mode, various target bands are dedicated to observations of trace constituents relevant to stratospheric/mesospheric chemistry and dynamics such as O$_3$, ClO, N$_2$O, HNO$_3$, H$_2$O, CO, and isotopes of H$_2$O and O$_3$. Profile information is retrieved from the spectral measurements of a limb scan by inverting the adiative transfer equation for a non-scattering atmosphere. A retrieval algorithm based on the ``Optimal Estimation Method'' has been adopted for the ground segments of Odin-SMR in Sweden and in France. We present results of stratospheric mode measurements taken during the 2002/2003 northern hemisphere winter. Activated chlorine was observed inside the Arctic polar vortex until mid-February. The accumulated chemical ozone loss in the lower stratosphere, derived from the correlation with the chemically passive tracer N$_2$O, is estimated to be in the order of 20-30\,%. Odin is a Swedish-led satellite project funded jointly by Sweden, Canada, Finland and France.
DE: 0340 Middle atmosphere--composition and chemistry
DE: 0341 Middle atmosphere--constituent transport and chemistry (3334)
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting