Articles | Volume 21, issue 10
Hydrol. Earth Syst. Sci., 21, 4989–5007, 2017
https://doi.org/10.5194/hess-21-4989-2017
Hydrol. Earth Syst. Sci., 21, 4989–5007, 2017
https://doi.org/10.5194/hess-21-4989-2017
Research article
06 Oct 2017
Research article | 06 Oct 2017

Effects of different reference periods on drought index (SPEI) estimations from 1901 to 2014

Myoung-Jin Um et al.

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Short summary
This study aims to understand how different reference periods (i.e., calibration periods) of climate data for estimating the drought index influence regional drought assessments. Specifically, we investigate the influence of different reference periods on historical drought characteristics such as trends, frequency, intensity and spatial extents using the Standard Precipitation Evapotranspiration Index (SPEI) estimated from the two widely used global datasets.