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Statistical analysis of extreme drought and wet events in Russia

Abstract

Statistical analysis of extreme drought and wet events in Russia has been carried out using the SPI index calculated over 500 stations, using records of monthly precipitations from 1966 to 2010. Different statistical parameters were calculated to characterize the spatiotemporal variability of drought and wet events. The calculations show a trend toward an increase in the intensity of drought and wetness extremes in Russia during the past 20 years, with a prevalence of wet events over drought ones. The drought propagation decreases for the European territory of Russia in June and August and increases in July. A trend for the wetness is opposite. For the Asian territory of Russia, drought significantly increases in July along with a decrease in wetness.

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Correspondence to D. N. Utkuzova.

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Original Russian Text © D.N. Utkuzova, V.M. Han, R.M. Vil’fand, 2015, published in Optika Atmosfery i Okeana.

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Utkuzova, D.N., Han, V.M. & Vil’fand, R.M. Statistical analysis of extreme drought and wet events in Russia. Atmos Ocean Opt 28, 336–346 (2015). https://doi.org/10.1134/S1024856015040144

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Keywords

  • precipitation
  • statistical analysis
  • extreme drought
  • extreme wetness
  • SPI index
  • climate variability