Lidar Monitoring of Atmospheric Atomic Mercury and Sulfur Dioxide in Guangzhou, China
A Differential Absorption Lidar(DIAL)system based on a dye laser pumped by a 20 Hz Nd:YAG laser was constructed and used for range-resolved atomic mercury and sulfur dioxide monitoring.These gases are both severe pollutants in China,and there is a considerable interest to map such gases.Measurements were performed from a fixed laboratory,with the eye-safe laser beam pointing upwards at a 15? angle,to assess the vertical distribution of the gases.Long term quasi-continuous monitoring of background mercury and sulfur dioxide concentrations is presented.In particular,the influence of weather conditions was studied during prolonged measurement sequences.We have now studied prominent wash-out effects on mercury due to rainfall.For sulfur dioxide,a pollutant that causes acid rain quite high concentrations measured in Guangzhou were observed to fall drastically at rainfall due to wash-out.
Guangyu Zhao Xiuxiang Wu Ming Lian Sune Svanberg
Center for Optics and Electromagnetic Research South Normal China University City Campus,Guangzhou 5 Center for Optics and Electromagnetic Research South Normal China University City Campus,Guangzhou 5
国际会议
Progress in Electromagnetics Research Symposium 2014(2014年电磁学研究新进展学术研讨会)
广州
英文
2711-2714
2014-08-01（万方平台首次上网日期，不代表论文的发表时间）