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利用中尺度模式WRF(Weather Research and Forecasting Model)3.2版本模拟了一次冬季温带气旋过境过程,分析海气通量模拟对9种微物理方案和3种行星边界层方案的敏感性。LIN方案和YSU方案组合实验模拟出的平均风速最大,WSM3方案和ACM2方案组合平均风速最小。总体上,边界层方案对感热和潜热模拟的影响大于微物理方案的影响,风暴过境前,各实验模拟的海气通量对参数化选择不敏感;风暴期间,不同边界层参数化方案风速模拟差异较大,气温也存在差异,从而导致感热模拟差异较大;风暴过后,不同参数方案感热和潜热模拟差异较大,主要由于风速、气温和比湿综合作用导致。各种组合模拟出的海气通量均存在系统误差,这主要受近地面边界层方法限制,因此WRF 3.2还需进一步改善。
A winter mesosphere transition was simulated using the Weather Research and Forecasting Model (WRF) version 3.2. The sensitivity of the ocean flux simulation to nine micro-physical schemes and three planetary boundary layer schemes was analyzed. The average wind speed simulated by combination of LIN scheme and YSU scheme is the largest, and the average wind speed is the least in combination of WSM3 scheme and ACM2 scheme. In general, the influence of the boundary layer scheme on the sensible heat and latent heat is greater than that of the microphysical scheme. Before the storm crosses, the air-sea fluxes simulated by each experiment are insensitive to the choice of parameters. During the storm, The results show that there are significant differences in the sensible heat transfer simulation. After the storm, the sensible heat and latent heat simulations of different schemes have large differences, mainly due to the combination of wind speed, temperature and specific humidity. There are systematic errors in the air-sea fluxes simulated by various combinations. This is mainly limited by the near-surface boundary layer method, so WRF 3.2 needs to be further improved.