首页|Sensitivity Simulations of the 30 March 2020 Xichang Wildfire in Southwest China Based on the WRF-Fire Model

Sensitivity Simulations of the 30 March 2020 Xichang Wildfire in Southwest China Based on the WRF-Fire Model

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This paper describes a fire forecast system—Weather Research and Forecasting-Fire(WRF-Fire)—that is em-ployed to simulate a real wildfire case in Xichang,Sichuan Province,Southwest China on 30 March 2020 at a 100-m resolution over the fire area,in order to provide a fine representation of the terrain and fuel heterogeneities and expli-citly resolve the atmospheric turbulence.Four sensitivity experiments were conducted to analyze the impacts of at-mospheric model grid spacing and fire-atmosphere interaction on simulated meteorological fields and fire behavior.The results indicate that finer horizontal grid spacing in the atmospheric model improves the accuracy of wind,tem-perature,and moisture simulations in the near surface layer.Especially,it can better describe local wind field charac-teristics,capture microscale wind speed fluctuations,and produce more significant effect from fire-atmosphere inter-action.The mass and energy released by the fire model and its feedback to the atmospheric model exhibit enhanced heterogeneous characteristics.The simulated fire area aligns well with the observation,with KAPPA coefficient(KC)of 0.56-0.59 and spatial correlation coefficient(SC)of 0.52-0.59.For this real case,the influence of heterogeneous land surface on the fire behavior is much greater than the atmosphere-fire interaction.The study suggests that WRF-Fire holds high potential as a real wildfire simulation tool,offering a new and feasible approach for fire prediction.

Weather Research and Forecasting-Firewildfirecoupled fire-atmosphere modelingfire behaviorlarge-eddy simulation(LES)

Yujue LIU、Shiguang MIAO、Hanbin ZHANG

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Institute of Urban Meteorology,China Meteorological Administration,Beijing 100089

Key Laboratory of Urban Meteorology,China Meteorological Administration,Beijing 100089

National Key Research and Development Program of ChinaNational Natural Science Foundation of China

2022YFC300410542275201

2024

10.1007/s13351-024-3171-5

气象学报(英文版)
中国气象学会

气象学报(英文版)

CSTPCD
影响因子：0.57
ISSN：0894-0525
年,卷(期)：2024.38(4)