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Atmosphere 2013, 4(2), 94-112; doi:10.3390/atmos4020094
Article

Spatio-Temporal Analysis of Droughts in Semi-Arid Regions by Using Meteorological Drought Indices

1,*  and 2,3
Received: 27 February 2013 / Revised: 25 March 2013 / Accepted: 12 April 2013 / Published: 25 April 2013
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Abstract

Six meteorological drought indices including percent of normal (PN), standardized precipitation index (SPI), China-Z index (CZI), modified CZI (MCZI), Z-Score (Z), the aridity index of E. de Martonne (I) are compared and evaluated for assessing spatio-temporal dynamics of droughts in six climatic regions in Iran. Results indicated that by consideration of the advantages and disadvantages of the mentioned drought predictors in Iran, the Z-Score, CZI and MCZI could be used as a good meteorological drought predictor. Depending on the month, the length of drought and climatic conditions of the region, they are an alternative to the SPI that has limitations both because of only a few available long term data series in Iran and its complex structure.
Keywords: drought monitoring; drought index; standardized precipitation index; semi-arid region; Iran drought monitoring; drought index; standardized precipitation index; semi-arid region; Iran
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Shahabfar, A.; Eitzinger, J. Spatio-Temporal Analysis of Droughts in Semi-Arid Regions by Using Meteorological Drought Indices. Atmosphere 2013, 4, 94-112.

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