Cloud Resolving WRF Simulations of Precipitation and Soil Moisture Over the Central Tibetan Plateau: An Assessment of Various Physics Options
Cloud Resolving WRF Simulations of Precipitation and Soil Moisture Over the Central Tibetan Plateau: An Assessment of Various Physics Options
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DOI：
10.1029/2019ea000865
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发表时间：
2020-01
影响因子：
3.1
通讯作者：
M. Lv;Zhongfeng Xu;Zong‐Liang Yang
中科院分区：
文献类型：
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作者：
M. Lv;Zhongfeng Xu;Zong‐Liang Yang
区域气候模式的评价对模式的发展和应用具有重要意义。2015年7月至8月，我们评估了天气研究和预报（WRF）云解析模拟的性能，其中包括青藏高原中部（TP）降水和土壤湿度的各种物理选项。微物理方案对降水的影响最大，其次是陆面模式，后者对土壤水分的模拟起着至关重要的作用，而行星边界层方案和辐射方案对降水和土壤水分的影响相对较小。具体而言，强降水事件与陆面模式有着密切的关系。在不同的WRF方案中，新的Thompson微物理方案、诺亚陆面模型、GFDL辐射方案和Mellor-Yamada行星边界层方案在中心TP上的表现相对优于其他方案。相比之下，Lin和WRF Single‐Moment 6级微物理方案往往模拟日循环中较早的降水峰值、过高的强度以及高降水事件的更高频率。快速更新周期模型对降水时空格局的模拟效果最差，并明显夸大了土壤水分的日变化。这些结果可为进一步开展青藏高原陆气相互作用的精细模拟研究提供有价值的指导。
The evaluation of the regional climate model is of great importance for model's developments and applications. We assessed the performance of Weather Research and Forecasting (WRF) cloud resolving simulations with various physics options in terms of precipitation and soil moisture over the central Tibetan Plateau (TP) for a 2‐month simulation from July to August in 2015. The simulated precipitation is most sensitive to the microphysics scheme, followed by the land surface model, which plays a vital role in the soil moisture simulation, while the planetary boundary layer and radiation schemes have relatively minor impacts on the precipitation and soil moisture. Specifically, the heavy precipitation event has a close relationship with the land surface model. Among the different WRF schemes, the new Thompson microphysics scheme, the Noah land surface model, the GFDL radiation scheme, and the Mellor–Yamada planetary boundary layer scheme perform relatively better than other options over the central TP. In contrast, the Lin and WRF Single‐Moment 6‐class microphysics schemes tend to simulate an earlier precipitation peak in the diurnal cycle, excessively higher intensities, and greater frequencies for high precipitation events. The Rapid Update Cycle model performs the worst in the spatiotemporal pattern of precipitation and markedly exaggerates the diurnal variation of soil moisture. These results can provide valuable guidance for further fine‐scale simulation studies of land–atmosphere interaction over the TP.