Historical Shifts in Seasonality and Timing of Extreme Precipitation

G. J. Gründemann*, E. Zorzetto, N. van de Giesen, R. J. van der Ent

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Global warming impacts the hydrological cycle, affecting the seasonality and timing of extreme precipitation. Understanding historical changes in extreme precipitation occurrence is crucial for assessing their impacts. This study uses relative entropy to analyze historical changes in seasonality and timing of extreme daily precipitation occurrences on the global domain for 63 years of fifth generation of the European Reanalysis reanalysis data. Our analysis reveals distinct regional patterns of change. During the second half of the 20th century, Africa and Asia experienced high clustering of precipitation extremes. Over the past 60 years, clustering increased in Africa while becoming more spread out in Asia. North America and Australia had initially lower clustering and showed slight increases over time. Extreme events in extra-tropical land regions mainly occurred in summer, with modest shifts in timing. These findings have implications for risk assessments of natural hazard like flash floods and landslides, emphasizing the necessity for region-specific adaptation strategies.

Original languageEnglish
Article numbere2023GL105200
Number of pages11
JournalGeophysical Research Letters
Issue number24
Publication statusPublished - 2023


  • climate change
  • extreme precipitation
  • global domain
  • reanalysis
  • relative entropy
  • seasonality


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