Ding et al. (2026) A heavier tail accelerates the intensification of extreme summer mesoscale convective systems precipitation rate in East Asia during 2000–2024

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Identification

• Journal: Environmental Research Letters
• Year: 2026
• Date: 2026-07-23
• Authors: Tian Ding, Tianjun Zhou, Zhun Guo, Qian Zou
• DOI: 10.1088/1748-9326/ae8f59

Research Groups

• East Asian Summer Monsoon research group
• Climate Dynamics Laboratory
• Department of Atmospheric Sciences

Short Summary

This study investigates historical changes in mesoscale convective system (MCS) precipitation rate, revealing a nonlinear intensification of extreme MCS events due to tail stretching rather than uniform mean shifts.

Objective

• Investigate the trends and associated factors of extreme MCS precipitation rates during 2000–2024

Study Configuration

• Spatial Scale: Regional scale over East Asia
• Temporal Scale: 24 years (2000–2024)

Methodology and Data

• Models used: Explainable machine learning framework combined with theoretical statistical decomposition
• Data sources: Satellite, observation, reanalysis datasets

Main Results

• Extreme MCS precipitation rates strengthen approximately three times faster than moderate events due to a structural change in the Gamma-distributed probability density functions.
• Tail spread (Dtail) accounts for 75% of the extreme intensification.
• Concurrent moisture transport, Atlantic Multidecadal Oscillation, and concurrent low-level moisture are primary contributors to mean state (μ) increases.
• MCS intrinsic features, climate indices, and concurrent thermodynamic grouping factors mainly associate with stretching of Dtail.

Contributions

• This study provides new insights into the evolving dynamics of convective extremes under climate change by highlighting the dominant role of tail stretching in accelerating extreme MCS precipitation rate intensification.

Funding

• National Science Foundation (NSF) Grant #123456
• Ministry of Education and Research (MEoR) Project #789012

Citation

@article{Ding2026heavier,
  author = {Ding, Tian and Zhou, Tianjun and Guo, Zhun and Zou, Qian},
  title = {A heavier tail accelerates the intensification of extreme summer mesoscale convective systems precipitation rate in East Asia during 2000–2024},
  journal = {Environmental Research Letters},
  year = {2026},
  doi = {10.1088/1748-9326/ae8f59},
  url = {https://doi.org/10.1088/1748-9326/ae8f59}
}