Ozone depletion in the Arctic winter 2007-2008

International audience The Arctic winter 2007-08 was characterized by cold temperatures and a strong vortex. Potentials for large areas of ice and Polar Stratospheric Clouds (PSCs) are observed during the winter. A vortex wide denitrification (removal of 60-80% of NOy) and intense chlorine activatio...

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Bibliographic Details
Published in:International Journal of Remote Sensing
Main Authors: Kuttippurath, Jayanarayanan, Godin-Beekmann, Sophie, Lefèvre, Franck, Pazmino, Andrea
Other Authors: 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)
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-00424295
https://doi.org/10.1080/01431160902821965
Description
Summary:International audience The Arctic winter 2007-08 was characterized by cold temperatures and a strong vortex. Potentials for large areas of ice and Polar Stratospheric Clouds (PSCs) are observed during the winter. A vortex wide denitrification (removal of 60-80% of NOy) and intense chlorine activation (0.6 to 1.05 ppb of ClO) are found inside the vortex at 475 K. This chemical morphology triggered a high rate of ozone loss during the winter. The simulated results from MIMOSA-CHIM show a large loss of ozone at 425-550 K from January to March, about 1.5-2.3 ppm. The vortex averaged loss at 475 K is about 2.5 ppm in mid-March, which is in very good agreement with the estimated loss (2.3 ppm) from the Microwave Limb Sounder (MLS) measurements. Similar analyses from MIMOSA-CHIM for recent winters show a cumulative loss of 2.1 ppm in 2006-07 and 2.0 ppm in 2004-05 in tune with the measurements. The measured and simulated results show the highest loss in 2007-08 in comparison with the analyses for the last four winters at 475 K.

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