Liu et al. (2026) Microphysical Characteristics of a Squall Line Modulated by the Northeast China Cold Vortex Using Polarimetric Radar and Disdrometer Observations

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

Identification

• Journal: Remote Sensing
• Year: 2026
• Date: 2026-04-13
• Authors: Li Liu, Yuting Sun, Zhikang Fu, Lei Yang, Zhaoping Kang, Lingli Zhou
• DOI: 10.3390/rs18081163

Research Groups

Not explicitly mentioned in the provided text.

Short Summary

This study comprehensively analyzes the microphysical processes within a Northeast China Cold Vortex (NCCV)-influenced squall line using polarimetric radar and disdrometer data, revealing that convective rain exhibits a continental-type raindrop size distribution (DSD) driven by vigorous ice-phase processes, contrasting with Mei-yu events.

Objective

• To systematically examine the raindrop size distribution (DSD) characteristics and three-dimensional microphysical structure of an NCCV-influenced squall line in Liaoning Province, and compare its warm-rain microphysical mechanisms with a Mei-yu event.

Study Configuration

• Spatial Scale: Liaoning Province, Northeast China (focused on a single squall line event).
• Temporal Scale: A single squall line event.

Methodology and Data

• Models used: None mentioned in the provided text.
• Data sources: Coordinated S-band polarimetric radar, surface disdrometer observations.

Main Results

• Convective rain in the NCCV squall line exhibits a continental-type DSD, characterized by fewer but larger raindrops compared to other heavy rainfalls in China.
• Mei-yu frontal convection under NCCV influence shows a transitional DSD pattern between maritime and continental types, with raindrops smaller and denser than those in the NCCV squall line.
• The vertical structure of the mature squall line's convective region shows prominent differential reflectivity (ZDR) and specific differential phase (KDP) columns above the melting level, indicating vigorous riming growth of graupel and hail driven by strong updrafts.
• The stratiform region is characterized by ice crystals and aggregates, primarily formed through deposition and aggregation processes.
• The large but sparse raindrops in the NCCV squall line are shaped by the subsequent melting of ice-phase particles, followed by collision–coalescence and evaporation-driven size sorting.
• Surface DSD is modulated by environmental conditions and vertical microphysics: a drier, more unstable environment in the NCCV squall line favors deep convection with active ice-phase processes, while a relatively moist and stable environment in Mei-yu convection supports shallower convection dominated by warm-rain processes.

Contributions

• Provides a comprehensive analysis of microphysical processes within an NCCV-influenced squall line using coordinated polarimetric radar and disdrometer observations.
• Offers a comparative analysis of DSD and warm-rain microphysical mechanisms between NCCV squall lines and Mei-yu events, highlighting the role of environmental conditions in shaping precipitation microphysics.
• Enhances understanding of the distinct microphysical characteristics of heavy precipitation events in Northeast China.

Funding

Not mentioned in the provided text.

Citation

@article{Liu2026Microphysical,
  author = {Liu, Li and Sun, Yuting and Fu, Zhikang and Yang, Lei and Kang, Zhaoping and Zhou, Lingli},
  title = {Microphysical Characteristics of a Squall Line Modulated by the Northeast China Cold Vortex Using Polarimetric Radar and Disdrometer Observations},
  journal = {Remote Sensing},
  year = {2026},
  doi = {10.3390/rs18081163},
  url = {https://doi.org/10.3390/rs18081163}
}