Yang et al. (2025) Modulation of Warm‐Season Heavy Precipitation Microphysics by Synoptic Patterns in the Yangtze‐Huaihe River Basin: Insights From GPM‐DPR and Principal Component Classification

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Identification

• Journal: Journal of Geophysical Research Atmospheres
• Year: 2025
• Date: 2025-11-26
• Authors: Ji Yang, Long Wen, Jing Wen, Jiafeng Zheng, Gang Chen, WU Hai-ying
• DOI: 10.1029/2025jd045076

Research Groups

Not explicitly mentioned in the abstract.

Short Summary

This study investigates the microphysical characteristics of warm-season heavy precipitation in the Yangtze–Huaihe River Basin across six identified synoptic patterns, revealing that while warm-rain processes generally dominate, monsoon-related patterns lead to high concentrations of small-to-medium raindrops, whereas convective patterns enhance ice-phase processes producing larger, less concentrated raindrops.

Objective

• To investigate the microphysical characteristics of warm-season heavy precipitation in the Yangtze–Huaihe River Basin with respect to different synoptic patterns.

Study Configuration

• Spatial Scale: Yangtze–Huaihe River Basin of China.
• Temporal Scale: Warm-season (April to September) over a 10-year period (2014–2023).

Methodology and Data

• Models used: Principal component analysis in T-mode classification.
• Data sources: Dual-frequency precipitation radar onboard satellite observations.

Main Results

• Six distinct synoptic patterns were identified, with three monsoon-related types (T1, T2, T3) contributing to 87% of heavy precipitation hours.
• Monsoon patterns (T1, T2, T3) are characterized by moderate convection and warm-rain dominance, leading to homogeneous microphysical features with high concentrations of small-to-medium raindrops.
• Perturbed synoptic patterns (T4: cold vortex, T5: typhoon-influenced, T6: weak disturbance) collectively account for 13% of events.
• T4 and T6 exhibit stronger convective activity, intensifying ice-phase processes and producing larger raindrops with low concentration.
• T5 (typhoon-influenced) shows substantial moisture, enhancing warm-rain processes and maximizing the concentration of small raindrops.
• Despite differences, all patterns generally exhibit maritime-like microphysics with dominant warm-rain processes.
• Moisture supply and convective intensity are identified as key factors regulating regional heavy precipitation microphysics by influencing warm-rain and ice-phase processes.

Contributions

• Provides observational benchmarks for comprehending precipitation extremes and improving model parameterization.
• Highlights the critical role of large-scale circulation in shaping regional precipitation microphysics.
• Offers a comprehensive analysis of heavy precipitation microphysics across different synoptic patterns in the Yangtze–Huaihe River Basin using a decade of satellite radar data.

Funding

Not explicitly mentioned in the abstract.

Citation

@article{Yang2025Modulation,
  author = {Yang, Ji and Wen, Long and Wen, Jing and Zheng, Jiafeng and Chen, Gang and Hai-ying, WU},
  title = {Modulation of Warm‐Season Heavy Precipitation Microphysics by Synoptic Patterns in the Yangtze‐Huaihe River Basin: Insights From GPM‐DPR and Principal Component Classification},
  journal = {Journal of Geophysical Research Atmospheres},
  year = {2025},
  doi = {10.1029/2025jd045076},
  url = {https://doi.org/10.1029/2025jd045076}
}