Comparison of the WRF and MM5 Models for Simulation of Heavy Rainfall along the Baiu Front
Comparison of the WRF and MM5 Models for Simulation of Heavy Rainfall along the Baiu Front
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DOI：
10.2151/sola.2005-051
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发表时间：
2005
期刊：
影响因子：
1.9
通讯作者：
H. Kusaka;A. Crook;J. Dudhia;K. Wada
中科院分区：
文献类型：
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作者：
H. Kusaka;A. Crook;J. Dudhia;K. Wada
通过对一次沿着白乌锋面暴雨过程的数值模拟，比较了WRF模式和MM5模式的性能差异。WRF和MM5模式模拟的降水型与实况基本一致。然而，WRF，MM5和观测之间的细节不同。在WRF和观测中，最大降雨量的位置是在陆地上，而在MM5中则是在海上。在垂直速度场中，位置的差异更明显。此外，WRF的垂直速度场比MM5的更详细。垂直速度的功率谱密度清楚地显示了差异。敏感性实验表明，这是由于模式动力学的数值方案的差异，而不是在云微物理。
A comparison of WRF and MM5 models was conducted to investigate the differences in the performance for a simulation of a heavy rainfall event along the Baiu front. The simulated precipitation pattern from WRF and MM5 roughly agrees with the observations. However, details are different among WRF, MM5, and observations. The position of the heaviest rainfall is found onshore in WRF and the observations, whereas it is found offshore in MM5. The difference in the position is more clearly found in the vertical velocity field. Additionally, the vertical velocity field of WRF is more detailed than that of MM5. Power spectral density of the vertical velocity clearly shows the difference. Sensitivity experiments indicate that this is due to the differences in the numerical scheme for the model dynamics, not in the cloud microphysics.