Historical changes in drought characteristics and their impact on vegetation cover over Madagascar

Randriatsara, Herijaona Hani-Roge Hundilida; Holtanova, Eva; Rizwan, Karim; Babaousmail, Hassen; Rabezanahary, Mirindra Finaritra Tanteliniaina; Posset, Kokou Romaric; Alupot, Donnata; Ayugi, Brian Odhiambo

doi:https://doi.org/10.5194/nhess-25-2939-2025

Articles | Volume 25, issue 9

https://doi.org/10.5194/nhess-25-2939-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/nhess-25-2939-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 9

Research article

|

01 Sep 2025

Research article |

| 01 Sep 2025

Historical changes in drought characteristics and their impact on vegetation cover over Madagascar

Herijaona Hani-Roge Hundilida Randriatsara, Eva Holtanova, Karim Rizwan, Hassen Babaousmail, Mirindra Finaritra Tanteliniaina Rabezanahary, Kokou Romaric Posset, Donnata Alupot, and Brian Odhiambo Ayugi

Supplement

https://doi.org/10.5194/nhess-25-2939-2025-supplement

Data sets

ERA5-Land monthly av- eraged data from 1950 to present Copernicus Climate Change Service https://doi.org/10.24381/cds.68d2bb30

MODIS/Terra Vegetation Indices Monthly L3 Global 0.05Deg CMG V061 Kamel Didan https://doi.org/10.5067/MODIS/MOD13C2.061

Historical changes in drought characteristics and its impact on vegetation cover over Madagascar Herijaona Hani-Roge Hundilida Randriatsara Randriatsara et al. https://doi.org/10.5281/zenodo.15584300

Model code and software

The NCAR Command Language The NCAR Command Language https://doi.org/10.5065/D6WD3XH5

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Short summary

This study aims to analyze the spatiotemporal characteristics of drought (duration, frequency, severity, intensity) over Madagascar during 1981–2022 by using the Standardized Precipitation Index (SPI-3, SPI-6, and SPI-12). Additionally, impacts of drought on vegetation over the studied area were assessed based on an evaluation of the relationship between SPI and the Normalized Difference Vegetation Index (NDVI) during 2000–2022.