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本文利用多种资料对华北地区一次雷雨天气过程进行了分析,并采用WRF中尺度数值模式对本次过程进行了模拟,同时对不同的起报时间、不同的嵌套方式等进行了敏感性试验。结果表明:(1)WRF模式较好地模拟出了雷雨发生的形势场、水汽条件和能量条件;(2)起报时间和嵌套方式对形势场预报影响不大;(3)三层双向嵌套和两层双向嵌套相比,对于降水偏大的情况有明显的改善。
In this paper, we use a variety of data to analyze the process of a thunderstorm in North China, and use WRF mesoscale numerical model to simulate this process. At the same time, we carried out the sensitivity test for different starting times and different nesting methods . The results show that: (1) WRF mode simulates well the situation field, water vapor condition and energy condition of thunderstorm; (2) The time and nesting mode have little effect on the prediction of the situation; (3) Compared with two-way two-way nesting, the nesting has obvious improvement for the case of large rainfall.