Very early chlorine activation and ozone loss in the Arctic winter 2002-2003

Details Very early chlorine activation and ozone loss in the Arctic winter 2002-2003 Very early chlorine activation and ozone loss in the Arctic winter 2002-2003

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30wasc7t&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 23, pp. ASC 7-1, CiteID 2201, DOI 10.1029/2003GL018079

Physics

11

Atmospheric Composition And Structure: Middle Atmosphere-Composition And Chemistry, Atmospheric Composition And Structure: Middle Atmosphere-Constituent Transport And Chemistry (3334), Atmospheric Composition And Structure: Instruments And Techniques

Scientific paper

Chlorine activation and chemical ozone destruction is investigated in the Arctic winter 2002-03 using the tracer-tracer correlation technique. Consistent with very low temperatures in the early vortex, strong chlorine activation at 520 K potential temperature was observed already in mid-December 2002 by the MkIV balloon and at 400-500 K in early January 2003 from HALOE satellite measurements. Large column ozone loss was derived inside the outer vortex in January (23 +/- 9 DU) and substantially greater losses in February (51 +/- 9 DU) inside the vortex core in 380-550 K. Calculated ozone loss is similar in February in the two completely separated parts of the vortex. Little influence of mixing in of mid-latitude is noticeable after the reunification of the vortex. Further, some ozone loss at lower altitudes likely occurred during March and April consistent with polar stratospheric clouds detected by MIPAS-ENVISAT towards the end of March.

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