Thi et al. (2025) Recent Spatiotemporal Trends in Extreme Rainfall Events in South Korea: From Sub‐Hourly to Multi‐Day Scales

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: International Journal of Climatology
• Year: 2025
• Date: 2025-12-19
• Authors: An Hoang Thi, Juyoung Shin, Sunghun Kim
• DOI: 10.1002/joc.70226

Research Groups

Not explicitly stated in the abstract.

Short Summary

This study investigated temporal trends in annual maximum precipitation (AMP) across South Korea from 2004 to 2024 for eight durations ranging from 30 minutes to 3 days, revealing that extreme rainfall trends are highly dependent on duration and are becoming more spatially heterogeneous.

Objective

• To examine temporal trends in annual maximum precipitation (AMP) across South Korea for various rainfall durations (30 minutes to 3 days) from 2004 to 2024, and to identify monotonic trends and spatial patterns.

Study Configuration

• Spatial Scale: South Korea, utilizing data from 425 weather stations.
• Temporal Scale: A 21-year period from 2004 to 2024. Rainfall durations analyzed ranged from 1800 seconds (30 minutes) to 259200 seconds (3 days).

Methodology and Data

• Models used: Mann–Kendall test, modified Mann–Kendall test, block bootstrap Mann–Kendall test, and linear slope estimation for identifying monotonic trends.
• Data sources: Observational data from 425 weather stations across South Korea.

Main Results

• Annual maximum precipitation (AMP) trends exhibit a pronounced dependence on rainfall duration.
• Short-duration events (1800–7200 seconds) showed spatially scattered and mixed trends, likely influenced by local convection.
• Long-duration events (43200–259200 seconds) displayed distinct spatial patterns, with increases along the southern and southeastern coasts and decreases in central and northern inland regions.
• The spatial dispersion of AMP, quantified by the coefficient of variation, increased across all durations, indicating growing spatial heterogeneity in extreme rainfall.

Contributions

• Provides novel insights into sub-hourly and multi-day variability of extreme rainfall trends in South Korea, addressing a gap in existing literature that primarily focused on hourly or daily timescales.
• Demonstrates that extreme rainfall in South Korea is becoming both more spatially uneven and increasingly duration-dependent.
• Highlights the critical need to integrate multi-duration, spatially explicit information into hydrologic design standards and broader climate-resilient planning efforts.

Funding

Not explicitly stated in the abstract.

Citation

@article{Thi2025Recent,
  author = {Thi, An Hoang and Shin, Juyoung and Kim, Sunghun},
  title = {Recent Spatiotemporal Trends in Extreme Rainfall Events in South Korea: From Sub‐Hourly to Multi‐Day Scales},
  journal = {International Journal of Climatology},
  year = {2025},
  doi = {10.1002/joc.70226},
  url = {https://doi.org/10.1002/joc.70226}
}