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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 36, issue 6 | Copyright
Ann. Geophys., 36, 1495-1505, 2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 05 Nov 2018

Regular paper | 05 Nov 2018

Case study of ozone anomalies over northern Russia in the 2015/2016 winter: measurements and numerical modelling

Yury M. Timofeyev1, Sergei P. Smyshlyaev2, Yana A. Virolainen1, Alexander S. Garkusha1, Alexander V. Polyakov1, Maxim A. Motsakov2, and Ole Kirner3 Yury M. Timofeyev et al.
  • 1Saint Petersburg State University, 7/9, Universitetskaya Emb., St. Petersburg, 199034, Russia
  • 2Russian State Hydrometeorological University, 79 Voronezhskaya str., St. Petersburg, 192027, Russia
  • 3Steinbuch Centre for Computing, Karlsruhe Institute of Technology, Kaiserstrasse 12, 76131 Karlsruhe, Germany

Abstract. Episodes of extremely low ozone columns were observed over the territory of Russia in the Arctic winter of 2015/2016 and the beginning of spring 2016. We compare total ozone columns (TOCs) from different remote sensing techniques (satellite and ground-based observations) with results of numerical modelling over the territory of the Urals and Siberia for this period. We demonstrate that the provided monitoring systems (including the new Russian Infrared Fourier Spectrometer IKFS-2) and modern three-dimensional atmospheric models can capture the observed TOC anomalies. However, the results of observations and modelling show differences of up to 20%–30% in TOC measurements. Analysis of the role of chemical and dynamical processes demonstrates that the observed short-term TOC variability is not a result of local photochemical loss initiated by heterogeneous halogen activation on particles of polar stratospheric clouds that formed under low temperatures in the mid-winter.

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Short summary
Atmospheric ozone plays a vital role, absorbing the ultraviolet solar radiation and heating the air, thus forming the stratosphere itself. If not absorbed, UV radiation would reach Earth's surface in amounts that are harmful to a variety of lifeforms. Climate change may lead to increasing ozone depletion, especially in the Arctic. Observation and prediction of the ozone variability are crucial for the investigation of its nature and the prediction of potential increase in surface UV radiation.
Atmospheric ozone plays a vital role, absorbing the ultraviolet solar radiation and heating the...