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Updated: Sep 19, 2025

Simulating Temperature in a Soil Incubation Experiment
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Warming accelerates global drought severity.

Solomon H Gebrechorkos1,2, Justin Sheffield3, Sergio M Vicente-Serrano4

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This summary is machine-generated.

Global drought severity is increasing, with atmospheric evaporative demand (AED) significantly worsening drought conditions worldwide. This trend is expanding drought-affected areas and is expected to continue with future warming.

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Area of Science:

  • Environmental Science
  • Climate Science
  • Earth Science

Background:

  • Droughts are complex global hazards impacting environments and economies.
  • Uncertainties exist in global drought trends and the role of atmospheric evaporative demand (AED).

Purpose of the Study:

  • To investigate global drought trends from 1901-2022.
  • To quantify the impact of atmospheric evaporative demand (AED) on drought characteristics.

Main Methods:

  • Development of high-resolution global drought datasets (1901-2022).
  • Analysis of drought trends and the contribution of AED.

Main Results:

  • A global increasing trend in drought severity was observed.
  • AED increased global drought severity by an average of 40%.
  • Drought-affected areas expanded by 74% (2018-2022) vs. 1981-2017, with AED contributing 58% of this increase.

Conclusions:

  • AED plays an increasingly critical role in driving severe droughts.
  • Both dry and wet regions are experiencing drying trends due to increased AED.
  • This trend is projected to continue under future warming scenarios.