Variations in the stratospheric ozone in the Scandinavian sector of the Arctic during the AASE campaign and 1989

Kjell Henriksen; Soren H. H. Larsen; Oleg I. Shumilov; Bardi Thorkelsson

doi:10.1117/12.163497

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2 November 1993 Variations in the stratospheric ozone in the Scandinavian sector of the Arctic during the AASE campaign and 1989

Kjell Henriksen, Soren H. H. Larsen, Oleg I. Shumilov, Bardi Thorkelsson

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Proceedings Volume 2047, Atmospheric Ozone; (1993) https://doi.org/10.1117/12.163497
Event: High Latitude Optics, 1993, Tromso, Norway

Abstract

The Airborne Arctic Stratospheric Expedition (AASE) carried out measurements from Jan. 3 to Feb. 15, 1989. Enhanced levels of chlorine compounds were found in the Arctic stratosphere, and on two single flights ozone decrease of 17% were measured, interpreted as essential features of the Arctic stratosphere, caused by a combined effect of enhanced amounts of chlorine compounds and the presence of polar stratospheric clouds. Related model calculations also indicate extended ozone depletion maximizing in late March 1989 and amount to 5 - 8% in column at 70 degree(s) N. Ground-based ozone measurements, however, show that the most characteristic features during this period are temporal variations and a strong enhancement of ozone, probably due to an extended stratospheric warming. From these measurements it is hard to see any effect of an eventual enhanced burden of stratospheric chlorine, which might show up as an extended and long-lasting decrease of stratospheric ozone, but its eventual existence is masked by the temporal variations.

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Kjell Henriksen, Soren H. H. Larsen, Oleg I. Shumilov, and Bardi Thorkelsson "Variations in the stratospheric ozone in the Scandinavian sector of the Arctic during the AASE campaign and 1989", Proc. SPIE 2047, Atmospheric Ozone, (2 November 1993); https://doi.org/10.1117/12.163497

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