Ozone Depletion and Denitrification in the Arctic Winter 2010/2011
Abstract
Record ozone depletion has been observed in the Arctic winter 2010/2011. During this winter and spring the polar vortex had an rather small size but was stable until April. Temperatures below 195 K remained until the end of March. These conditions caused denitrification by sedimenting HNO3 containing particles peaking at around 475 K potential temperature and renitrification below 400 K potential temperature. These conditions further caused chlorine activation over an untypically long period, favoring strong ozone depletion. Observed and simulated ozone depletion were above 50% by the end of March. We show simulations of the Chemical Lagrangian Model of the Stratosphere (CLaMS) for this winter. The results of the simulation are compared with ACE-FTS satellite data for NOy and O3 as well as balloon-borne in situ observations of ClO and ClONO2 of the HALOX experiment on 1 April.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2011
- Bibcode:
- 2011AGUFM.A43C0147G
- Keywords:
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- 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE;
- 0340 ATMOSPHERIC COMPOSITION AND STRUCTURE / Middle atmosphere: composition and chemistry;
- 0341 ATMOSPHERIC COMPOSITION AND STRUCTURE / Middle atmosphere: constituent transport and chemistry;
- 3300 ATMOSPHERIC PROCESSES