初始场和分辨率对WRF模拟对流性降水的影响

文章利用WRF模式分析了2015年7月29日内蒙古中部地区一次典型冷涡过程带来的对流性降水,探讨了初始场和网格分辨率对对流性降水模拟结果的影响。初始场和网格分辨率均会影响模式模拟结果,对于对流性短时强降水而言,在相同的初始场条件下,网格分辨率越高,对降水强度和落区的预报越准确,而在相同的高分辨率网格条件下,初始场的精度越高,模拟不同等级降水的TS评分均较高,表明在高分辨率网格和高精度的初始场条件下,模式对不同等级的降水均有较好的模拟。

The Impact of Initial Field and Resolution on a Simulation of Convective Precipitation

Based on the WRF model,a convective precipitation was analyzed and simulated in Central Inner Mongolia on 29 July,2015.The influence of initial field and grid resolution on simulation results of convection precipitation was discussed.Both the initial field and the grid resolution affect the results of model simulation.For convective short-time heavy precipitation,the higher the grid resolution under the same initial field conditions,the more accurate the forecast of precipitation intensity and rainfall area.Under the same high-resolution grid conditions,the higher the accuracy of the initial field,the higher the TS scores for simulating different grades of precipitation.It shows that the model has a good simulation for different grades of precipitation under high-resolution grid and high-precision initial field conditions.