Dependence of ozone lamina characteristics on the distance from the polar vortex edge—possible relation to climate change

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Monday, 18 January 2010
Peter Krizan, Institute of Atmospheric Physics, Prague, Czech Republic; and M. Kozubek

Handout (452.6 kB)

Ozone laminae are the narrow layers of enhanced (positive) or depleted (negative) concentration of total ozone. Large laminae are formed at the vicinity of polar vortex and they are one of mechanism of exchange of air masses between the polar vortex and its surrounding We observed similar long-term trend pattern in the total amount of ozone in lamina per profile and in the number of laminae per profile as in the case of total ozone (Krizan and Lastovicka, JGR, 2005). The aim of this poster is to find the dependence of the ozone lamina characteristics on the distance from the polar vortex edge in equivalent latitude space. We expect the ozone laminae will be more frequent near the vortex edge. The number of ozone laminae will decrease with increasing distance from the vortex edge. We use data from the European middle latitudes ozonosonde stations taken from WOUDC database in Toronto. altogether about 10 000 ozonosonde profiles. We compare the results from the European stations with that in Arctic stations, because Arctic stations are frequently situated inside vortex compared to the middle latitude stations. Possible changes with time of the dependence of ozone lamina characteristics on the the distance from the polar vortex edge as a consequence of long-term changes of ozone and greenhouse gas concentration in the lower stratosphere will be searched for.