WRF-Lake模式不同参数化方案对纳木错湖区夏季大气边界层模拟的影响  

Influence of WRF-Lake Model on Summer Atmospheric Boundary Layer Simulation in Nam Co Lake Area under Different Subgrid Parameterization Schemes

作　　者：王梓奕 杨显玉 吕雅琼 孟宪红 王黎欢 WANG Ziyi;YANG Xianyu;LÜYaqiong;MENG Xianhong;WANG Lihuan(College of Atmospheric Sciences,Chengdu University of Information Technology/Sichuan Key Laboratory of Plateau Atmosphere and Environment,Chengdu 610225,Sichuan,China;Institute of Mountain Hazards and Environment,Chinese Academy of Sciences,Chengdu 610299,Sichuan,China;Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,Gansu,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]成都信息工程大学大气科学学院/高原大气与环境四川省重点实验室,四川成都610225 [2]中国科学院、水利部成都山地灾害与环境研究所,四川成都610299 [3]中国科学院西北生态环境资源研究院中国科学院寒旱区陆面过程与气候变化重点实验室,甘肃兰州730000 [4]中国科学院大学,北京100049

出　　处：《高原气象》2024年第6期1416-1432,共17页Plateau Meteorology

基　　金：国家自然科学基金项目(41975153,41975130);成都信息工程大学教师科技创新能力提升计划项目(KYQN202239);中国科学院、水利部成都山地灾害与环境研究所科研项目(IMHE-ZDRW-06)。

摘　　要：采用改进湖泊动力参数模块的WRF-Lake模式(WRF4.4.1),选取6种微物理方案、5种积云对流方案、2种边界层方案,共60种参数化方案组合对纳木错湖区2008年7月5-13日天气进行模拟,通过敏感性试验对比分析不同参数化方案组合对大气边界层内变量的模拟效果,利用“排名方法”对不同参数化方案在纳木错湖区夏季大气边界层的模拟能力进行综合评估。结果表明,模式能较好捕捉纳木错夏季平均2 m温度的总体时空分布特征,但湖上2 m温度模拟值偏高;受积云对流参数化方案和模式性能影响,各试验组对降水的模拟效果差异化显著并对日降水量存在不同程度的高估;模式对纳木错测站潜热通量日平均变化模拟性能最好,感热和风向较好,风速最差。整体而言,综合分析各试验组对纳木错湖夏季大气边界层的模拟能力发现,方案58(SBU-Tiedtke-MYNN3)对纳木错湖夏季2 m温度、日降水量、10 m风场及地表热通量的模拟效果最好。2 m温度RMSE值为2.38℃,日降水量RMSE值为10.48 mm,10 m风速日平均变化的相关系数为-0.41,标准差之比为0.94,10 m风向日平均变化的相关系数为0.59,标准差之比为0.73,感热通量日平均变化的相关系数为0.94,标准差之比为1.89,潜热通量日平均变化的相关系数为0.89,标准差之比为0.91。因此,建议使用以上次网格参数化方案进行纳木错湖区夏季大气边界层模拟。In this study,the improvements of lake dynamic module parameters in the literature were added to WRF-Lake(WRF4.4.1)at first,then six microphysical schemes,five cumulus convection schemes and two boundary layer schemes were selected.A total of 60 WRF-Lake simulations with different parameterization schemes were carried out from July 5 to 13,2008 in the Nam Co Lake area.Sensitivity experiments were conducted to comparatively analyze the effects of different parameterization scheme combinations on atmospheric boundary layer variables.The"ranking method"was employed to comprehensively evaluate the simulation capabilities of different parameterization schemes in the summer atmospheric boundary layer over Nam Co Lake.The results indicated that the model captures the overall spatial and temporal distribution characteristics of the summer average two-meter temperature in Nam Co.However,the simulated values of the two-meter temperature over the lake were higher than the land surface data.Due to the selection of cumulus convection parameterization schemes and the impact of model performance,there was significant differentiation in the simulation effects of precipitation among experimental groups,leading to varying degrees of overestimation of daily precipitation.The daily average variations of latent heat fluxes showed the best correlation with observational values,while sensible heat and wind direction exhibited relatively good performance,and wind speed showed the least satisfactory results.Overall,comprehensive analysis of the simulation capabilities of each experimental group for the summer atmospheric boundary layer over Nam Co Lake revealed that Scheme 58(SBU-Tiedtke-MYNN3)performed the best in simulations of 2 m temperature,daily precipitation,10 m wind fields,and surface heat fluxes.The RMSE value for two-meter temperature and daily precipitation was 2.33°C and 10.48 mm,respectively.The correlation coefficient for the daily average variation of 10 m wind speed was-0.41,and the ratio of standard deviations was 0.94

关 键 词：纳木错湖 WRF-Lake 参数化方案 边界层 

分 类 号：P456.7[天文地球—大气科学及气象学]