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大气边界层高度对大气颗粒物污染具有重要的影响。为研究京津冀区域的大气边界层高度变化特征,利用该地区多个站点的激光雷达数据,进行了统计研究,并将激光雷达观测值与美国国家气象局国家环境预报中心全球资料同化系统模式模拟结果进行了对比。观测数据表明,京津冀地区的大气边界层具有明显的日变化特征和季节变化特征:白天的大气边界层高度高于夜晚,且边界层高值出现在14:00左右;夏、冬季的大气边界层高度高于春、冬季;冬季大气边界层高度有降低趋势。此外,2014年11月多个站点由激光雷达测得的边界层高度的统计分析表明,京津冀地区大气边界层高度在300~900m之间,且东南方向较高。
Atmospheric boundary layer height has an important impact on atmospheric particulate matter pollution. In order to study the characteristics of atmospheric boundary layer height variation in the Beijing-Tianjin-Hebei region, a statistical study was carried out by using lidar data from multiple sites in the area. The data from the lidar observations were compared with the global data assimilation system model of the National Center for Environmental Preservation The simulation results are compared. The observation data show that the atmospheric boundary layer in Beijing-Tianjin-Hebei region has obvious diurnal and seasonal variations: the daytime atmospheric boundary layer height is higher than that of the night, and the boundary layer height appears around 14:00; the summer and winter atmosphere The height of boundary layer is higher than that in spring and winter; the height of atmospheric boundary layer in winter tends to decrease. In addition, the statistical analysis of the boundary layer height measured by lidar at multiple sites in November 2014 shows that the height of the atmospheric boundary layer in Beijing-Tianjin-Hebei region is between 300 and 900 m and the southeast direction is high.