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Adaptability evaluation of boundary layer schemes for simulation of sea and land breeze circulation in the west coast of the Yellow Sea
Atmospheric Research ( IF 4.5 ) Pub Date : 2022-07-25 , DOI: 10.1016/j.atmosres.2022.106354
Lei Zhang , Jinyuan Xin , Yan Yin , Zifa Wang , Dawei Wang , Yongjing Ma , Danjie Jia , Yunyan Jiang , Lin Wu , Xiaole Pan

In the study, a three dimensional Doppler Wind Lidar placed at a coastal city Rizhao in west coast of Yellow sea was used to evaluate the wind field simulated by ten different planetary boundary layer parameterization schemes (PBLS) in the Weather Research and Forecasting model. It is found that the characteristics of the simulated wind field are very sensitive to the boundary layer parameterization schemes used in the model, especially for the sea-land breeze (SLB). Analysis shows that Grenier-Bretherton-McCaa (GBM), Mellor-Yamada Nakanishi and Niino Level 2.5 (MYNN2), and Yonsei University (YSU) produced more realistic results of the three dimensional wind field, as well as the occurrence time, duration and heights of SLB. This is because the entrainment effect is adopted in the GBM scheme, which improves the radiation process between the ground and the atmosphere and ensures the accuracy of turbulent diffusion calculation caused by the differences of temperature and humidity in coastal area. The YSU scheme introduces a local gradient correction term, so that the non-local thermals brings the surface hot air to the middle and upper part of the boundary layer. This process increases the turbulent mixing induced by thermal forcing in the simulation of SLB. The MYNN2 scheme specifies the relationship between the length scale and buoyancy, turbulence scale and surface layer in turbulent kinetic energy equation, and introduces a set of closure parameters representing buoyancy and shear. However, the disadvantages of this scheme are that the influence of the underlying surface is not considered in detail, and the entrainment heat flux at the top of the convective boundary layer is underestimated.



中文翻译:

黄海西岸海陆风环流模拟边界层方案适应性评价

在研究中,一个三维多普勒测风激光雷达放置在黄海西海岸沿海城市日照,用于评估天气研究与预报模型中十种不同行星边界层参数化方案(PBLS)模拟的风场。发现模拟风场的特性对模型中使用的边界层参数化方案非常敏感,尤其是海陆风(SLB)。分析表明,Grenier-Bretherton-McCaa (GBM)、Mellor-Yamada Nakanishi and Niino Level 2.5 (MYNN2) 和延世大学 (YSU) 对三维风场以及发生时间、持续时间和SLB 的高度。这是因为在GBM方案中采用了夹带效应,改善了地面与大气之间的辐射过程,保证了沿海地区温湿度差异引起的湍流扩散计算的准确性。YSU 方案引入了局部梯度校正项,使非局部热气流将地表热空气带到边界层的中上部。该过程增加了 SLB 模拟中由热强迫引起的湍流混合。MYNN2方案规定了湍动能方程中长度尺度与浮力、湍流尺度与表层的关系,并引入了一组代表浮力和剪切力的闭合参数。但该方案的缺点是没有详细考虑下垫面的影响,

更新日期:2022-07-25
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