Nonlinear Processes in Geophysics
Nonlinear Processes in Geophysics
NPG
Articles | Volume 33, issue 2
Articles | Volume 33, issue 2
https://doi.org/10.5194/npg-33-303-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/npg-33-303-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 33, issue 2
Research article
 | 
08 Jun 2026
Research article |  | 08 Jun 2026

Nonlinear quantitative relationship between the duration and occurrence frequency of droughts

Pengcheng Yan, Guolin Feng, Cailing Zhao, Ping Yang, Hao Wu, and Dongdong Zuo

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Short summary
In this study, we examine the relationship between drought duration and frequency across China using daily data. We find a clear double-logarithmic relationship between the duration and the frequency. We also show that droughts in dry northwestern areas tend to last for months, while those in wet southeastern regions are shorter but more frequent. This pattern holds across all drought intensities. Overall, our findings offer a simple tool for drought risk assessment and water management.
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Emerging predictability, prediction, and early-warning approaches...