摘要
基于2014年1月21日至2月5日成都市人民南路四段逐时PM_(2.5)质量浓度、大气能见度资料以及同期Mie散射激光雷达探测数据,遵循消光系数与细颗粒物质量浓度之间的关系,探讨污染边界层高度的演变特征。结果表明:污染时段内的污染边界层高度偏低,平均为221m;污染边界层高度与地面PM_(2.5)浓度的变化具有明显相关性,但污染边界层高度改变在前,地面PM_(2.5)浓度响应在后;污染边界层高度的日变化表现为单峰单谷型,峰值和谷值分别出现在08:00时和14:00时前后。
Based on the monitoring data of PM_（2.5）mass concentration,and atmospheric visibility at Renmin South Road Station and the synchronous Mie scattering lidar detection data from January 21 to February 5 in 2014,according to the relationship between extinction coefficient and mass concentration of fine particulate matter,the characteristics of pollution boundary layer was analyzed. The results showed that： The pollution boundary layer height was low in the period of pollution process and its average height was 221m; the pollution boundary layer height was obvious positive correlative with PM_（2.5）mass concentration on the ground,and the pollution boundary layer changed earlier while PM_（2.5）mass concentration on the ground responsed successively; diurnal variation of the pollution boundary layer height showed a characteristic of one single peak and one single valley,and the height attained its maximum and minimum at about 08： 00 and 14： 00,respectively.
出处
《环境工程》
CAS
CSCD
北大核心
2017年第1期98-102,共5页
Environmental Engineering
基金
四川省环境保护重大科技专项(2013HBZX01)
四川省教育厅重点项目(15Z091)
关键词
成都
PM2.5质量浓度
消光系数
污染边界层高度
演变
Chengdu
PM2.5 mass concentration
extinction coefficient
the pollution boundary layer height
evolution
