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New Drought Index Reveals Global Trends Since 1981

6/5/2025

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Summary

Drought Analysis Insights

The SPEI31 drought index, spanning data from 1981 to 2022, measures drought severity through a unique blend of precipitation and atmospheric evaporative demand. By creating four high-resolution indices, this study dives deep into global precipitation and AED datasets, revealing critical trends and insights into the evolving nature of droughts worldwide.

Summary

Drought Intensified by Climate

Since 1981, atmospheric evaporative demand (AED) has intensified global drought severity by a staggering 40%, driven by climate change. In 2022, a shocking 30% of land experienced moderate to extreme drought, with AED playing a crucial role. Areas like Australia and Africa are bearing the brunt, urgently calling for innovative strategies to combat water loss and alleviate drought effects.

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Drought Analysis Insights

The SPEI31 drought index, spanning data from 1981 to 2022, measures drought severity through a unique blend of precipitation and atmospheric evaporative demand. By creating four high-resolution indices, this study dives deep into global precipitation and AED datasets, revealing critical trends and insights into the evolving nature of droughts worldwide.

1 / 2