Modeling study on boundary layer height in pollution weather by WRF with different boundary layer schemes
LU Zheng-qi1, HAN Yong-xiang1, XIA Jun-rong1,2, ZHAO Tian-liang1
1. Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044, China;
2. Key Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
Atmospheric boundary layer height (ABLH) is one of important factors affecting concentrations of air pollutants,but different boundary layer (BL) schemes in numerical models could result in uncertainties in predicting ABLH.By using five BL schemes in the Weather Research and Forecast (WRF) model,combined with the Lidar observed data at Xianghe in spring,autumn and winter of 2006 and 2007,this study compared the simulated ABLH with different BL schemes in the pollution periods,analyzed the cause of simulation errors.The results indicated that five BL schemes could capture the variations of ABLH,but there were obvious discrepancies between the simulated and the observed ABLH.In autumn and winter,the monthly maximums of ABLH were modeled better than those in spring.Also,the root mean square errors in diurnal changes of simulated ABLH were assessed with spring > autumn > winter,especially in the afternoon between 2~6pm in local time.The non-local YSU scheme presented the best simulation in polluted days.The ABLH simulation errors could be mainly caused by the differences in atmospheric profiles,turbulent kinetic energy and the ABLH calculation.
陆正奇, 韩永翔, 夏俊荣, 赵天良. WRF模式对污染天气下边界层高度的模拟研究[J]. 中国环境科学, 2018, 38(3): 822-829.
LU Zheng-qi, HAN Yong-xiang, XIA Jun-rong, ZHAO Tian-liang. Modeling study on boundary layer height in pollution weather by WRF with different boundary layer schemes. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(3): 822-829.
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