The causes of the large-scale ozone depletion over Antarctica in October 2015

V. V. Zuev

doi:10.1117/12.2500158

13 December 2018 The causes of the large-scale ozone depletion over Antarctica in October 2015

V. V. Zuev

Proceedings Volume 10833, 24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 1083394 (2018) https://doi.org/10.1117/12.2500158
Event: XXIV International Symposium, Atmospheric and Ocean Optics, Atmospheric Physics, 2018, Tomsk, Russian Federation

Abstract

The southern stratospheric polar vortex usually reaches its peak intensity in early September, and the size of the Antarctic ozone hole reaches its maximum in the second half of September. However, in 2015 the maximum values of the ozone hole area were observed in October and November and reached record values for these months for the last 39 years. An unusual increase in the ozone hole area in 2015 initially was explained by the influence of volcanic plume from the Calbuco eruption which occurred in April 2015 with a maximum plume altitude of 17 km. This conclusion is investigated in this study using the NOAA HYSPLIT trajectory model. It is shown that eruption plume from this Chilean volcano could not get inside the stratospheric polar vortex. The cause of the Antarctic ozone hole increase was an unusual strengthening of the polar vortex in October and November.

Citation Download Citation

V. V. Zuev "The causes of the large-scale ozone depletion over Antarctica in October 2015", Proc. SPIE 10833, 24th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 1083394 (13 December 2018); https://doi.org/10.1117/12.2500158

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