北京边界层参数化敏感性模拟研究  

Study of Sensitivity Simulation of Planetary Boundary Layer Parameterization Schemes in Beijing

作　　者：梁甜 陈亮[1,2] 何建军[3,4] 张磊 龚山陵[3] 车慧正[3] LIANG Tian;CHEN Liang;HE Jianjun;ZHANG Lei;GONG Shanling;CHE Huizheng(Key Laboratory of Geographic Information Science(Ministry of Education),East China Normal University,Shanghai 200241,China;School of Geographic Sciences,East China Normal University,Shanghai 200241,China;State Key Laboratory of Severe Weather&Key Laboratory for Atmospheric Chemistry of China Meteorological Administration,Chinese Academy of Meteorological Sciences,Beijing 100081,China;Key Laboratory of Meteorological Disaster,Ministry of Education/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster,Nanjing University of Information Science and Technology,Nanjing 210044,Jiangsu,China)

机构地区：[1]华东师范大学地理信息科学教育部重点实验室,上海200241 [2]华东师范大学地理科学学院,上海200241 [3]中国气象科学研究院灾害天气国家重点实验室/中国气象局大气化学重点开放实验室,北京100081 [4]南京信息工程大学气象灾害教育部重点实验室、气象灾害预报预警与评估协同创新中心,江苏南京210044

出　　处：《高原气象》2021年第3期656-670,共15页Plateau Meteorology

基　　金：国家自然科学基金项目(41705080,41975131);国家重点研发计划大气污染专项(2019YFC0214601);气象灾害教育部重点实验室&气象灾害预报预警与评估协同创新中心开放课题(KLME201804);上海市自然科学基金项目(18ZR1410700);华东师范大学地理信息科学教育部重点实验室主任基金项目(KLGIS2019C01)。

摘　　要：利用中尺度数值天气预报模式WRF(Weather Research and Forecasting Model)模拟晴天条件下北京边界层的气象场特征,并通过敏感性试验研究四组边界层参数化方案(YSU、ACM2、MYJ和BL)对辐射、地表能量、近地面气象要素以及边界层结构的模拟差异。结果表明:四种边界层参数化方案都可以准确模拟向下短波辐射,对长波辐射的模拟能力相似。YSU方案模拟的感热通量最低,四种参数化方案对地表净辐射通量的模拟差异主要受到短波辐射的影响。MYJ方案模拟的2 m温度效果最好,YSU方案对2 m比湿以及10 m风速的模拟效果最优,综合而言,YSU方案对近地面气象要素的模拟效果较好。与探空数据对比,得到四种边界层参数化方案模拟的高层温度廓线偏冷,湿度偏高,风速偏低。与气象铁塔观测数据对比,白天四组试验都能够较为准确地反映温度垂直廓线,YSU方案在15 m以上模拟的相对湿度结果最接近观测值。YSU方案模拟的边界层高度最高,非局地方案模拟的边界层高度相对局地方案更高,MYJ方案模拟的边界层高度误差较大。In order to study the characteristic of planetary boundary layer structure and near surface meteorological elements in Beijing,the Weather Research and Forecasting Model(WRF)is used to simulate the boundary layer meteorological field in Beijing during clear days. The simulation differences of the four sets of planetary boundary layer parameterization schemes(YSU,ACM2,MYJ,BL)on radiation,surface energy budget,meteorological elements and planetary boundary layer structure are studied through sensitivity tests. Then,the measured data of observation stations,including 2 m-temperature,2 m-specific humidity and 10 m-windspeed,the sounding data and the observed data of 325 m meteorological tower are used to compare with the simulated data.The study is divided into four parts. The first part is the introduction. The second part mainly introduces the research area,data and methods. The third part analyzes the research results comparing the WRF model simulation results with the actual observation data and evaluates the simulation results. Then the fourth part is about the result and discussion. The results indicate that:All schemes can accurately simulate the downward shortwave radiation,and the abilities to simulate the longwave radiation are similar. MYJ scheme has the best simulation effect for 2 m-temperature,YSU scheme performs the best in 2 m-specific humidity and 10 m-wind speed,in general,YSU scheme is superior in simulating surface meteorological elements. However,all the experiments simulation results of 2 m-temperature at night are higher than the observed temperature,which may be caused by the model’s insufficient consideration of the urban surface and the particularity of the urban boundary layer. And the further research will be focused on this aspect. In addition,the temperature profiles which simulated by four PBL schemes are colder than the observation,the specific humidity profiles are higher and the wind speed profiles are lower. In order to analyze the vertical structure of the planetary boundary laye

关 键 词：WRF模式 边界层参数化方案 辐射 垂直廓线 

分 类 号：P435[天文地球—大气科学及气象学]