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Simultaneous measurements of OClO, NO2 and O-3 in the Arctic polar vortex by the GOMOS instrument

by C Tetard, D Fussen, C Bingen, N Capouillez, E Dekemper, N Loodts, N Mateshvili, F Vanhellemont, E Kyrola, J Tamminen, V Sofieva, A Hauchecorne, F Dalaudier, J -L. Bertaux, O Fanton d'Andon, G Barrot, M Guirlet, T Fehr, L Saavedra show all authors
ATMOSPHERIC CHEMISTRY AND PHYSICS ()
  • ISSN: 1680-7316

Abstract

We present the first nighttime measurements of OClO from a limb-viewing\nsatellite instrument in the Arctic polar vortex. The relationship\nbetween OClO, NO2 and O-3 slant column densities in the Arctic polar\nvortex are analyzed from the GOMOS measurements. The retrieval process\nis based on a differential optical absorption spectroscopy (DOAS) method\napplied on the weighted median GOMOS transmittances. A study of the\nlongitudinal distributions of OClO, NO2 and O-3 above 65 degrees north\nin January 2008 is presented. It shows a strong halogen activation in\nthe lower stratosphere and a strong denoxification in the entire\nstratosphere inside the Arctic polar vortex. Time series of temperatures\nand OClO, NO2 and O-3 slant column densities for the winters 2002/2003\nto 2007/2008 are also presented. They highlight the correlation between\ntemperature, OClO and NO2. The GOMOS instrument appears to be a very\nsuitable instrument for the monitoring of OClO, NO2 and O-3 in the\nstratosphere during nighttime.

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