Yang et al. (2025) Modeling Tropical Cyclone Boundary Layer Wind Fields over Ocean and Land: A Comparative Assessment

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

Identification

• Journal: Atmosphere
• Year: 2025
• Date: 2025-11-11
• Authors: Jian Yang, Jiuwei Zhao, Yanan Tang, Zhongdong Duan
• DOI: 10.3390/atmos16111280

Research Groups

Not explicitly mentioned in the provided text.

Short Summary

This study evaluates four tropical cyclone boundary layer models under idealized and real-case conditions, demonstrating that incorporating nonlinear vertical advection and spatially varying surface roughness significantly improves the accuracy of wind field simulations, particularly near landfall.

Objective

• To comprehensively evaluate four representative tropical cyclone boundary layer models (M95, K01, Y21a, Y21b) under idealized and real tropical cyclone conditions, focusing on the roles of vertical advection, turbulent diffusion, and surface roughness parameterization in shaping wind field structures.

Study Configuration

• Spatial Scale: Tropical cyclone boundary layer (regional scale, coastal regions).
• Temporal Scale: Not explicitly stated, but implies the duration of a tropical cyclone event, including landfall (hours to days).

Methodology and Data

• Models used: M95, K01, Y21a, Y21b (tropical cyclone boundary layer models). WRF (Weather Research and Forecasting) model for comparison/benchmark.
• Data sources: Idealized experiment setups; Real case data for Typhoon Mangkhut (2018) landfall; WRF simulation outputs for validation.

Main Results

• Model Y21a, which includes nonlinear vertical advection, generates stronger and more realistic super-gradient phenomena compared to linear models M95 and K01.
• Model Y21b, incorporating spatially varying drag coefficients and a terrain-following coordinate system, successfully reproduces asymmetric wind patterns observed in WRF simulations during landfall, achieving a correlation coefficient (R) of 0.93.
• Integrating spatially varying drag coefficients into linear models (M95, K01) improved their correlation with WRF simulations by approximately 37%.
• The study highlights the critical need for incorporating nonlinear advection, dynamic turbulence, and surface heterogeneity for physically consistent tropical cyclone boundary layer simulations.

Contributions

• Provides a comprehensive evaluation of existing tropical cyclone boundary layer models, identifying key physical processes (nonlinear advection, dynamic turbulence, surface heterogeneity) crucial for accurate simulations.
• Demonstrates the significant impact of spatially varying surface roughness parameterization on reproducing asymmetric wind patterns during tropical cyclone landfall.
• Offers valuable guidance for improving parametric wind field models and enhancing tropical cyclone wind hazard assessments, especially over complex coastal terrains.

Funding

Not mentioned in the provided text.

Citation

@article{Yang2025Modeling,
  author = {Yang, Jian and Zhao, Jiuwei and Tang, Yanan and Duan, Zhongdong},
  title = {Modeling Tropical Cyclone Boundary Layer Wind Fields over Ocean and Land: A Comparative Assessment},
  journal = {Atmosphere},
  year = {2025},
  doi = {10.3390/atmos16111280},
  url = {https://doi.org/10.3390/atmos16111280}
}