Assessment of future changes in compound extremes of air temperature and precitation in the XXI century for the Sevastopol region

E.V. Vyshkvarkova1,2, O.Yu. Sukhonos1,2, E.N. Voskresenskaya1,2

 1Institute of Natural and Technical Systems, RF, Sevastopol, Lenin St., 28

2Sevastopol State University, RF, Sevastopol, Universitetskaya St., 33


DOI: 10.33075/2220-5861-2022-2-5-11

UDC 551.583


   In the present work, an assessment of possible future changes in the compound extremes of air temperature and precipitation by the middle and end of the 21st century in the Sevastopol region was carried out. The simultaneous or sequential occurrence of extreme events related to air temperature and precipitation can lead to adverse consequences in various areas of the economy and have a detrimental effect on humans. To assess future changes in the compound extremes, an ensemble of modeling results from ten regional climate models of the CORDEX research project was used. The paper uses the calculated data of average monthly air temperatures and precipitation under the scenarios of greenhouse gas concentrations RCP4.5 (moderately optimistic) and RCP8.5 (pessimistic) for a point in the Sevastopol region. The 25th and 75th percentiles of the indicated characteristics were taken as threshold values for determining the compound extremes. Four combinations were used to identify compound extremes: CD (cold/dry), CW (cold/wet), WD (warm/dry), and WW (warm/wet). It shows a decrease in the frequency of “cold” indices (CD and CW) in both future periods, and an increase in the number of months with compound extremes in future periods relative to the base period for “warm” indices, with temperatures above the 75th percentile – WD and WW for all seasons. The increase in the WD and WW indices seems to be related to an increase in the average values and temperature variability. The results can be useful in developing options for adaptation and mitigation of climate change in the region.

Keywords: compound extremes, air temperature, precipitation, projections, Sevastopol region, CORDEX.

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  1. Zscheischler J., Martius O., Westra S., Bevacqua E., Raymond C., Horton R.M., van den Hurk B., AghaKouchak A., Jézéquel A., Mahecha M.D., Maraun D., Ramos A.M., Ridder N.N., Thiery W., and Vignotto E. A typology of compound weather and climate events. Rev. Earth Environ., 2020, Vol. 1, pp. 333–347.
  2. Hao Z., AghaKouchak A., and Phillips T.J. Changes in concurrent monthly precipitation and temperature extremes. Res. Lett., 2013, Vol. 8, pp. 034014.
  3. Hao Z., Singh V.P., and Hao F. Compound Extremes in Hydroclimatology: A Review. Water, 2018, Vol. 10, pp. 718.
  4. IPCC Climate Change 2014: Synthesis Report, 2014: Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. IPCC Core Writing Team. Pachauri RK, Meyer LA (Eds). Geneva, Switzerland, 151 p.
  5. Zhan W., He X., Sheffield J., and Wood E.F. Projected seasonal changes in largescale global precipitation and temperature extremes based on the CMIP5 ensemble. Clim., 2020, Vol. 33 (13), pp. 5651–5671.
  6. Wu X., Hao Z., Tang Q., Singh V.P., Zhang X., and Hao F. Projected increase in compound dry and hot events over global land areas. J. Climatol., 2021, Vol. 41 (1), pp. 393–403.
  7. (March 21, 2022).
  8. Intergovernmental Panel on Climate Change (IPCC). Good Practice Guidance Paper on Assessing and Combining Multi Model Climate Projections; National Center for Atmospheric Research: Boulder, CO, USA, 2010.
  9. Beniston M. Trends in joint quantiles of temperature and precipitation in Europe since 1901 and projected for 2100. Geophys Res Lett., 2009, Vol. 36, pp. L07707.
  10. Taylor K.E. Summarising multiple aspects of model performance in a single diagram. Geophys. Research. Atmos, 2001, Vol. 106, pp. 7183–7192.
  11. Meng Y., Hao Z., Feng S., Zhang X., and Hao F. Increase in compound dry-warm and wet-warm events under global warming in CMIP6 models. Global and Planetary Change, 2022, Vol. 210, pp. 103773.
  12. Manning C., Widmann M., Bevacqua E., Van Loon A.F., Maraun D., and Vrac M.l. Increased probability of compound long-duration dry and hot events in Europe during summer (1950–2013). Environmental Research Letters, 2019, Vol. 14(9), pp. 094006.
  13. Zscheischler J. and Seneviratne S.I. Dependence of drivers affects risks associated with compound events. Adv, 2017, Vol. 3 (6), pp. 1700263.
  14. Vyshkvarkova E. and Rybalko E. Forecast of changes in air temperatures and heat indices in the Sevastopol region in the 21st century and their impacts on viticulture. Agronomy, 2021, Vol. 11, pp. 954.
  15. Stefanovich A.A. and Voskresenskaya E.N. Bioklimaticheskaja ocenka komfortnosti rekreacionnyh uslovij Kryma (Bioclimatic assessment of the comfort of recreational conditions in the Crimea). Sistemy kontrolja okruzhajushhej sredy, 2019, No. 2(36), pp. 81–87.