The spatial scale of ozone depletion events derived from an autonomous surface ozone network in coastal Antarctica

Jones, A.E. and Wolff, E. W. and Brough, N. and Bauguitte, S.J.-B. and Weller, R. and Yela, M. and Navarro-Comas, M. and Ochoa, H.A. and Theys, N. (2013) The spatial scale of ozone depletion events derived from an autonomous surface ozone network in coastal Antarctica. Atmospheric Chemistry and Physics, 13 (3). pp. 1457-1467. ISSN 1680-7316, ESSN: 1680-7324 DOI 10.5194/acp-13-1457-2013

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Abstract

To probe the spatial extent of tropospheric ozone depletion events during Antarctic spring, a network of 10 autonomous ozone monitors was established around the Dronning Maud Land sector of Antarctica for a full calendar year. Together with manned stations in the area, the network covered a ~1200 km stretch of coast, as well as a transect ~300 km inland and to ~2000 m above sea level (a.s.l.). Here we present results from the spring period (August to October 2008). While some ozone depletion events were evident at only a single site, implying localised ozone destruction, others were evident across the network. The fact that, on occasions, ozone depletion events were observed at all coastal sites simultaneously, suggests the depleted air mass had a scale of at least 1200 km. As the ozone-poor air was advected from the Weddell Sea sea ice zone, the data imply that large areas over the Weddell Sea sea ice zone are significantly depleted in ozone on occasions during Antarctic spring.

Item Type: Article
Uncontrolled Keywords: NIL AREP
Subjects: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Journal or Publication Title: Atmospheric Chemistry and Physics
Volume: 13
Page Range: pp. 1457-1467
Identification Number: 10.5194/acp-13-1457-2013
Depositing User: Sarah Humbert
Date Deposited: 07 Jul 2013 01:11
Last Modified: 23 Jul 2013 10:06
URI: http://eprints.esc.cam.ac.uk/id/eprint/2809

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