不同边界层方案在数值模拟中的应用——以华北地区无人机航路中一次暴雨为例

Application of Different Boundary Layer Schemes in Numerical Simulation—A Case Study of a Storm in the Flight Path of UVAs in North China

摘要: 本文基于WRF (Weather Research and Forecasting Model)中尺度数值模式，通过改变气候模式中的边界层参数化方案和η坐标系垂直分层的方式，模拟并分析2010年7月19日华北地区无人机低空公共航路所在区域的一次暴雨，定量分析各气候模式数据的精确度，从而为今后华北地区的无人机低空飞行气象保障提供关键技术支撑。研究分析表明：降雨模拟结果受边界层参数化方案的选择影响较大，YSU方案精确度高于MRF方案；风场模拟效果受η坐标系的垂直分辨率影响较大，垂直分辨率越高，模拟效果越好。

Abstract: This paper is based on the WRF (Weather Research and Forecasting Model) mesoscale numerical model, by changing the boundary layer parameterization scheme in the climate model and the vertical layering of the η coordinate system. Simulating and analyzing a storm in the area where the low-altitude public route of UAVs in North China was located on July 19, 2010, quantitative analysis of the accuracy of each climate model data, in order to provide the key technical support for the low-altitude flight meteorological protection of UAVs in North China in the future. Research and analysis show that rainfall simulation results are greatly affected by the choice of boundary layer parameterization scheme, and YSU scheme is more accurate than MRF scheme. The wind field simulation effect is greatly influenced by the vertical resolution of eta coordinate system; the higher vertical resolution simulates the better results.