Application of relative drought indices in assessing climate-change impacts on drought conditions in Czechia

  title={Application of relative drought indices in assessing climate-change impacts on drought conditions in Czechia},
  author={Martin Dubrovsk{\'y} and M. D. Svoboda and Miroslav Trnka and Michael J. Hayes and Donald A. Wilhite and Zděněk Žalud and Petr Hlavinka},
  journal={Theoretical and Applied Climatology},
The common versions (referred to as self-calibrated here) of the Standardized Precipitation Index (SPI) and the Palmer Drought Severity Index (PDSI) are calibrated and then applied to the same weather series. Therefore, the distribution of the index values is about the same for any weather series. We introduce here the relative SPI and PDSI, abbreviated as rSPI and rPDSI. These are calibrated using a reference weather series as a first step, which is then applied to the tested series. The… 
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