Ozone deficiencies measured during EASOE in Iceland: the 15.1.92 episode

Manuel Gil; Margarita Yela; Michel Van Roozendael; Paul C. Simon; Borgthor Jonnson

doi:10.1117/12.163498

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2 November 1993 Ozone deficiencies measured during EASOE in Iceland: the 15.1.92 episode

Manuel Gil, Margarita Yela, Michel Van Roozendael, Paul C. Simon, Borgthor Jonnson

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Proceedings Volume 2047, Atmospheric Ozone; (1993) https://doi.org/10.1117/12.163498
Event: High Latitude Optics, 1993, Tromso, Norway

Abstract

UV-Vis spectrometry measurements at zenith were carried out at Keflavik (64 N, 23 W) during the EASOE Campaign in the winter of 1991/92. During the middle of January, a situation of low ozone was observed associated to a very low temperature field in the lower stratosphere. Ozonesounding on day 15 January 1992 exhibits two different patterns, up and down 70 hPa. From the potential vorticity fields and backward trajectories analysis, the different origin of the air masses at the two layers are shown. While at the lower levels the ozone deficiency is the result of low latitudes advection, at the upper levels a more structured profile of 30% less than 10 days before is found to be air from inside the vortex presumably processed by PSC. The partial chemical depletion is supported by the very low NO₂ content measured at the same period at the station.

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Manuel Gil, Margarita Yela, Michel Van Roozendael, Paul C. Simon, and Borgthor Jonnson "Ozone deficiencies measured during EASOE in Iceland: the 15.1.92 episode", Proc. SPIE 2047, Atmospheric Ozone, (2 November 1993); https://doi.org/10.1117/12.163498

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