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Discussion papers | Copyright
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 22 Feb 2018

Regular paper | 22 Feb 2018

Review status
This discussion paper is a preprint. A revision of the manuscript is under review for the journal Annales Geophysicae (ANGEO).

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

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, Univ ersitetskaya 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 (TOC) obtained using different remote sensing techniques (satellite and ground-based observations) and results of numerical modelling over the territory of the Urals and Siberia for the above period. We demonstrate that the provided monitoring systems (including new Russian Fourier- spectrometer IKFS-2) and modern 3-dimensional models are able to capture the observed TOC anomalies. However, the results of observations and modelling show discrepancies of up to 20–30% in TOC measurements. Analysis of the role of chemical and dynamical processes demonstrates that it is unlikely that observed short-term TOC variability may be a result of local photochemical destruction initiated by heterogeneous halogen activation on particles of polar stratospheric clouds that formed under low temperatures in the mid-winter.

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Yury M. Timofeyev et al.
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Yury M. Timofeyev et al.
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Publications Copernicus
Short summary
Atmospheric ozone plays a vital role, absorbing the ultraviolet Sun radiation and heating the air, thus forming the stratosphere itself. If not absorbed, UV radiation would reach Earth surface in amounts that are harmful to a variety of life-forms. Climate change may lead to increasing ozone depletion especially in Arctic. Observation and prediction of the ozone variability is both crucial for the investigation of its nature and for the prediction of potential increase of surface UV-radiation.
Atmospheric ozone plays a vital role, absorbing the ultraviolet Sun radiation and heating the...