Simultaneous measurements of OClO, NO 2 and O 3 in the Arctic polar vortex by the GOMOS instrument

• Published in: Atmospheric Chemistry and Physics
• Main Authors: Tétard, Cédric, Fussen, Didier, Bingen, Christine, Capouillez, N., Dekemper, Emmanuel, Loodts, N., Mateshvili, Nina, Vanhellemont, Filip, Kyrölä, Erkki, Tamminen, Johanna, Sofieva, Viktoria, Hauchecorne, Alain, Dalaudier, Francis, Bertaux, Jean-Loup, Fanton d'Andon, Odile, Barrot, Gilbert, Guirlet, Marielle, Fehr, T., Saavedra, L.
• Other Authors: Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Finnish Meteorological Institute (FMI), STRATO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Analytic and Computational Research, Inc. - Earth Sciences (ACRI-ST), European Space Research Institute (ESRIN), Agence Spatiale Européenne = European Space Agency (ESA)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2009
• Subjects: [PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]; Arctic
• Online Access: https://hal.science/hal-00425395; https://hal.science/hal-00425395/document; https://hal.science/hal-00425395/file/acp-9-7857-2009.pdf; https://doi.org/10.5194/acp-9-7857-2009

International audience We present the first nighttime measurements of OClO from a limb-viewing satellite instrument in the Arctic polar vortex. The relationship between OClO, NO 2 and O 3 slant column densities in the Arctic polar vortex are analyzed from the GOMOS measurements. The retrieval process is based on a differential optical absorption spectroscopy (DOAS) method applied on the weighted median GOMOS transmittances. A study of the longitudinal distributions of OClO, NO 2 and O 3 above 65° north in January 2008 is presented. It shows a strong halogen activation in the lower stratosphere and a strong denoxification in the entire stratosphere inside the Arctic polar vortex. Time series of temperatures and OClO, NO 2 and O 3 slant column densities for the winters 2002/2003 to 2007/2008 are also presented. They highlight the correlation between temperature, OClO and NO 2 . The GOMOS instrument appears to be a very suitable instrument for the monitoring of OClO, NO 2 and O 3 in the stratosphere during nighttime.