为了验证中尺度数值模式WRF中参数化方案对新疆中天山地带巴音布鲁克盆地天气模拟的适用性,以寻找对该区域天气模拟WRF 模式中最优参数化方案组合。利用WRF模式对新疆中天山地带巴音布鲁克盆地2场强降水过程进行数值模拟,选取2种不同的边界层参数化方案(YSU,MYJ),2种不同的云动力参数化方案(Grell-Freitas,Grell-3),3种不同的云微物理参数化方案(Lin,WSM6,Thompson),3种不同的长短辐射参数化组合方案(New Goddard/New Goddard,Dudhia/RRTM,GFDL/GFDL),组成36种参数化方案组合。模式模拟采用双层嵌套的方式,其中内层嵌套区域为4 km精度,对中天山地带巴音布鲁克盆地进行数值模拟。同时,借助气象部门的自动站观测资料,与小时降雨量、空气温度、10 m风速、表面大气压强等边界层结构特征进行了比较分析,评估不同参数化方案的模拟差异。得出最优参数化方案组合:陆面参数化方案为YSU方案,云动力方案为Grell-Freitas方案,云微物理方案为WSM6,长波辐射和短波辐射参数化方案为Duhia/RRTM。各边界层参数化方案组合均能够模拟出降雨趋势变化特征,但最优参数化方案组合模拟结果与实际观测结果仍然存在一些差异。
刘洋
,
李诚志
,
刘志辉
,
邓兴耀
,
朱金焕
. 基于WRF模式的新疆巴音布鲁克盆地强降雨天气数值模拟效果分析[J]. 干旱区研究, 2016
, 33(1)
: 28
-37
.
DOI: 10.13866/j.azr.2016.01.03
In this paper, we evaluate the fitness of WRF physics schemes when simulate weather in Bayanbulak basin of the Tianshan Mountain area in Xinjiang, and seek the best performance one. So we use WRF to simulate two heavy precipitations in this area. We choose two cloud and convective parameterization schemes(Grell-Freitas,Grell-3), two boundary layer parameterization schemes(YSU,MYJ), three cloud microphysical parameterization schemes(Lin,WSM6,Thompson), three combination schemes of short and long radiation(New Goddard/New Goddard,Dudhia/RRTM,GFDL/GFDL). Based on these, we form 36 different combination schemes, and adopt double nested manner in WRF to simulate experimental area. Meanwhile, by using meteorological observational data of automatic weather station, we analyze hourly rainfall, 10 m wind speed, surface atmospheric pressure, atmospheric temperature and characteristics of boundary layer structure. Finally, we evaluate the difference among parameterization schemes and get the most stable ensemble parameterization schemes are YSU, Grell-Freitas, WSM6 and Duhia/RRTM. But even the best performance, one also have some gap to the observation.
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