Ozone layer state and level of ultraviolet irradiance over the territory of Ukraine in 2019

  • M. V. Savenets
  • I. V. Dvoretska
  • A. P. Umanets
  • N. V. Grechana
Keywords: total ozone content, ultraviolet irradiance, UV-index, anomaly, deviation


The paper presents main results of total ozone column (TOC) and levels of ultraviolet irradiance daily monitoring conducted for the Ukrainian territory in 2019. Monitoring and analysis were performed using TOC data measured by the satellite Ozone Monitoring Instrument (the OMI) and estimated values of ultraviolet index. The research was made on the regular grid with 1° spatial resolution and separately for geographical coordinates of centers of Ukrainian administrative regions. In 2019 the TOC ranged within a multiyear average standard with and its average value was equal to 260–360 D.u. During winter ozone concentration reached its highest values due to intensification of Brewer-Dobson circulation. Weakened polar vortex and ozone-rich air masses advection at the upper atmospheric levels which transport high ozone concentrations, resulted in the TOC positive anomalies emergence over Ukraine. The air masses penetrated Ukrainian territory from the north-west and this led to emergence anomalously high TOC values during a number of periods: February 23–24, March 2, March 12–14, March 26. In these periods 450–500 D.u. was a typical ozone content. Seasonal TOC decrease, observed from April to June, was caused by a weakened Brewer-Dobson circulation and intensification of photochemical ozone loss. Nevertheless, TOC deviations from average standard were negligible and this resulted in absence of very high UV-index values. The highest UV-index values did not reach 7 units. In July the TOC was slightly higher than usual concentrations, which was probably caused by dynamic factors. Such TOC values influenced the level of ultraviolet irradiance and the UV-index varied within 3–4 units' range which is typical for Ukraine in April–May. Such ozone state in 2019 made it impossible for UV-index to reach extremely high levels, especially during the summer period. Further TOC changes were characterized by typical seasonal ozone decrease with minimum values observed in October resulted from formation and intensification of polar vortex. Average minimum values in October amounted to 260–270 D.u., however, it is a typical TOC content for this period with a relative deviation from the standard constituting about -0.3σ. Seasonal ozone increase in 2019 started in mid-November. At the end of December the first high positive deviations happened. The highest of them reached close to anomalous 2–2.4σ values.


Fabian, P. & Dameris, M. (2014). Ozone in the Atmosphere: Basic Principles, Natural and Human Impacts. Springer.

Dessler, A. (2005). The Chemistry and Physics of Stratospheric Ozone. International Geophysics Series. Vol. 74. Academic Press.

World Health Organization (2002). Global solar UV index: a practical guide. A joint recommendation of WHO, WMO, UNEP, ICMIRP.

Dvoretska, I.V., Savenets, M.V., Umanets, A.P. et al. (2019). [Examination of the ozone layer condition and level of ultraviolet irradiation within the territory of Ukraine in 2018]. Ukraïnsʹkij gìdrometeorologìčnij žurnal [Ukrainian hydrometeorological journal], (23), 34-41. https://doi.org/10.31481/uhmj.23.2019.04 (in Ukr.)

Ministry of Ecology of Ukraine (2002). Natsionalna dopovid pro stan navkolyshnioho pryrodnoho seredovysccha v Ukraini v 2002 rotsi [National report on the environment in Ukraine in 2003]. Kyiv. (in Ukr.)

NASA Ozone Watch. Available at: https://ozonewatch.gsfc.nasa.gov (Accessed: 08.01.2020)

Belyavskiy, A., Grishchenko, V., Kruchenitskiy, G. et al. (1999). Empiricheskaya model dlya rascheta ultrafioletovoy obluchennosti po dannym izmereniy, vypolnennykh v khode Vtoroy Ukrainskoy Antarkticheskoy ekspeditsii [Empirical model for solar UV-irradiance calculation based on Second Antarctic Expedition data]. Naukovi pratsi UkrNDGMI. [Scientific papers of UkrSRHMI], 243, pp. 30–36 (in Russ.)

Savenets, M., Dvoretska, I. & Kruchenitskiy, G. (2016). The method for prediction of total ozone and ultraviolet radiation over Ukraine based on satellite data. EUMETSAT Meteorological Satellite Conference 2016, 26–30 September, Darmstadt, Germany. Available at: https://www.eumetsat.int/website/wcm/idc/idcplg?IdcService=GET_FILE&dDocName=ZIP_CONF_2016_S6_POSTERS&RevisionSelectionMethod=LatestReleased&Rendition=Web (Accessed: 10.01.2019).

How is total ozone distributed over the globe? Available at: https://www.esrl.noaa.gov/csd/assessments/ozone/2010/twentyquestions/Q4.pdf (Accessed: 08.01.2020)

Khrgian, A.H. (1973). Fizika atmosfernogo ozona [The physics of atmospheric ozone]. Leningrad: Gidrometeoizdat. (in Russ.)

Yevtushevskyi, O.M. (2014). [Longitudinal Dependence of Seasonal Changes of Total Ozone Content in the Northern Midlatitudinal Atmosphere]. Ukrainskyi zhurnal dystantsiinoho zonduvannia Zemli [Ukrainian Journal of Remote Sensing], 3, pp. 49–58 (in Ukr.)

Cordeco, E.C. & Kawa, S.R. (2001). Ozone and tracer transport variations in the summer Northern Hemisphere stratosphere. Journal of Geophisical Research, 106(D11), 12,227–12,239.

Polar vortex emerges over the North Pole. Available at: https://www.severe-weather.eu/news/polar-vortex-emerges/ (Accessed: 08.01.2020)

How to Cite
Savenets, M. V., Dvoretska, I. V., Umanets, A. P., & Grechana, N. V. (2020). Ozone layer state and level of ultraviolet irradiance over the territory of Ukraine in 2019. Ukrainian Hydrometeorological Journal, (25), 53-62. https://doi.org/10.31481/uhmj.25.2020.05
Meteorology and Climatology