Huang et al. (2025) Decrease in the spatial inhomogeneity of tropical cyclone rainfall in China

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Identification

• Journal: Environmental Research Letters
• Year: 2025
• Date: 2025-12-08
• Authors: Dong Huang, Shengyuan Liu, Xin Huang, Shunqi Zeng, Quanjia Zhong, Yan Yan, Deping Wu, Jianjun Xu, Shifei Tu
• DOI: 10.1088/1748-9326/ae293e

Research Groups

Not specified in the abstract.

Short Summary

This study reveals a significant 65% decrease in the spatial inhomogeneity of tropical cyclone (TC) rainfall across China from 1998–2023. This redistribution is driven by reduced rainfall in historically high-rainfall areas and increased rainfall in low-rainfall areas, primarily linked to northward TC migration.

Objective

• To investigate changes in the spatial inhomogeneity of tropical cyclone (TC) rainfall across China.

Study Configuration

• Spatial Scale: China (national to regional scale, including East China, North China, Taiwan, and Fujian).
• Temporal Scale: 26 years (1998–2023).

Methodology and Data

• Models used: Not explicitly mentioned for simulation or analysis beyond statistical methods.
• Data sources: High-resolution satellite precipitation data.

Main Results

• Tropical cyclone (TC) rainfall inhomogeneity across China decreased significantly by approximately 65% from 1998–2023.
• This decrease indicates a reduction in rainfall in historically high-TC-rainfall areas and an increase in low-TC-rainfall areas.
• In East China, the decline in inhomogeneity is mainly governed by the intra-regional component, with opposing rainfall trends between high- and low-rainfall areas reducing spatial disparities.
• North China experienced a marked increase in TC rainfall, accompanied by increased intra-regional but decreased inter-regional inhomogeneity, which largely offset each other.
• These spatial reorganizations of TC rainfall in East and North China are closely linked to the northward migration of TC activity in recent decades.
• This migration is driven by reduced landfalling TCs over Taiwan and Fujian and increased inland penetration of TCs into East and North China.

Contributions

• Reveals a significant restructuring of TC rainfall patterns across China, quantifying the decrease in spatial inhomogeneity.
• Emphasizes the growing regional contrasts in TC-related hydroclimatic impacts.
• Provides new insights crucial for disaster risk assessments and regional climate adaptation strategies in China.
• Links observed rainfall redistribution directly to the northward migration and altered landfalling patterns of TCs.

Funding

Not specified in the abstract.

Citation

@article{Huang2025Decrease,
  author = {Huang, Dong and Liu, Shengyuan and Huang, Xin and Zeng, Shunqi and Zhong, Quanjia and Yan, Yan and Wu, Deping and Xu, Jianjun and Tu, Shifei},
  title = {Decrease in the spatial inhomogeneity of tropical cyclone rainfall in China},
  journal = {Environmental Research Letters},
  year = {2025},
  doi = {10.1088/1748-9326/ae293e},
  url = {https://doi.org/10.1088/1748-9326/ae293e}
}