摘要
激光雷达是大气边界层气溶胶和云的一个高效探测工具。2010年12月利用Mie散射激光雷达对广州城区冬季大气边界层进行系统观测,分析讨论了测站地域上空大气气溶胶的消光系数垂直分布和时间变化的主要特征。结果表明:冬季广州大气边界层气溶胶主要分布在1100m以下区域,气溶胶分布具有多层结构;大气边界层高度稳定分布在500~620m左右,边界层高度日变化不明显;冬季广州气溶胶源较为稳定并且变化慢;广州城区气溶胶浓度白天比晚上大,峰值出现11颐00~14颐00左右,谷值出现在20颐00左右。
Lidar is a more effective device in monitoring the planetary boundary laye(rPBL)aerosol and cloud. The systematic observational results over Guangzhou in Dec 2010 were obtained by using Mie scattering lidar. The spatial-temporal characteristics of aerosol extinction coefficient in PBL are analyzed and discussed. The results indicate that the aerosol mainly distributes within 1 100 m over Guangzhou in winter, and its distribution has a multi-layer structure. The PBL locates stably at 500~620 m, without obvious diurnal change. The sources of aerosol are stable and change slowly. The aerosol density is heavier at daytime than at night, and its peak value appears at 1 1:00~14:00, while its value appears at 20:00.
出处
《广州环境科学》
2011年第2期7-10,共4页
Guangzhou Environmental Science
