Global Integrated Drought Monitoring and Prediction System (GIDMaPS)

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Introduction and Acronyms

The Global Integrated Drought Monitoring and Prediction System (GIDMaPS) is a drought monitoring and prediction system that provides near real-time drought information based on multiple drought indicators and input data sets.

Drought Indicators

SPI - Standardized Precipitation Index (McKee et al., 1993)
SSI - Standardized Soil Moisture Index (Hao and AghaKouchak, 2013a)
MSDI - Multivariate Standardized Drought Index (Hao and AghaKouchak, 2013b)


D0: Abnormally Dry (-0.50 to -0.79); D1: Moderate Drought (-0.80 to -1.29); D2: Severe Drought (-1.30 to -1.59); D3: Extreme Drought (-1.60 to -1.99); D4: Exceptional Drought (-2.0 or less)

W0: Abnormally Wet (0.50 to 0.79); W1: Moderate Wetness (0.80 to 1.29); W2: Severe Wetness (1.30 to 1.59); W3: Extreme Wetness (1.60 to 1.99); W4: Exceptional Wetness (2.0 or more)

Input Data Sets

MERRA - NASA Modern-Era Retrospective analysis for Research and Applications-Land (Reichle et al., 2011)
NLDAS - NASA North AmericanLand Data Assimilation System (Kumar et al., 2006)
GLDAS - NASA Global Land Data Assimilation System (Peters-Lidard et al., 2007)
GDCDR - Global Drought Climate Data Record (AghaKouchak and Nakhjiri, 2012) - Combination of GPCP (Adler et al., 2001) and PERSIANN (Sorooshian et al., 2000; Hsu et al., 1997)

GIDMaPS Publications

Hao Z., AghaKouchak A., Nakhjiri N., Farahmand A., 2014, Global Integrated Drought Monitoring and Prediction System, Scientific Data, 1:140001, 1-10, doi: 10.1038/sdata.2014.1. (pdf)

Hao Z., AghaKouchak A., 2014, A Nonparametric Multivariate Multi-Index Drought Monitoring Framework, Journal of Hydrometeorology, 15, 89-101, doi:10.1175/JHM-D-12-0160.1. (pdf)

Hao Z., AghaKouchak A., 2013a, Multivariate Standardized Drought Index: A Parametric Multi-Index Model, Advances in Water Resources, 57, 12-18, doi: 10.1016/j.advwatres.2013.03.009. (pdf)

AghaKouchak A., and Nakhjiri N., 2012, A Near Real-Time Satellite-Based Global Drought Climate Data Record, Environmental Research Letters, 7(4), 044037, doi:10.1088/1748-9326/7/4/044037. (pdf)


We would like to acknowledge the support and contribution of Michael Bosilovich (NASA), Rolf Reichle (NASA), Michael Hayes and Mark Svoboda (United States Drought Monitor, U of Nebraska). We apologize to those whose names unintentionally might have been omitted.


The Global Integrated Drought Monitoring and Prediction System (GIDMaPS) is provided 'as is' without any endorsement made and without warranty of any kind, either express or implied. While we strive to ensure that the information provided on GIDMaPS is accurate, no guarantees for the accuracy of information and the original input data are made. The GIDMaPS data and information can only be used at your own discretion and risk and with agreement that you will be solely responsible for any damage and that the authors and their affiliate institutions accept no responsibility for errors or omissions in the GIDMaPS data, information and documentation. In no event shall the authors, developers or their affiliate institutions be liable to you or any third parties for any special, direct, indirect or consequential damages and financial risks of any kind, or any damages whatsoever, resulting from, arising out of or in connection with the use of the GIDMaPS data and information. The user of the GIDMaPS agrees that the GIDMaPS data and information are subject to change without notice, and that the data and information may not be up-to-date. Finally, GIDMaPS provides information on large-scale and broad-scale conditions. Regional and local conditions may vary.