An air pollution process and potential sources of Harbin
WANG Xing1,2, LI Li-li1,2, WANG Kun1,2, LIU Yu-ping3, JIA Lin-lin3, JIANG Jun-qiu1,2, ZHU Li-na1,2
1. State Key Laboratory of Urban Water Resources and Environment, Harbin 150090, China; 2. School of Environment, Harbin Institute of Technology, Harbin 150090, China; 3. Heilongjiang Academy of Environmental Sciences, Harbin 150090, China
Abstract：A case study was carried out in Harbin during the severe air pollution period from December 10th to 13th, 2018, with focuses on the formation, evolution and potential source areas. The results showed that the air pollution process was dominated by PM2.5. The pollution type was dominated by coal combustion from 00:00 on the 10th to 17:00 on the 11th, then developed into the secondary aerosol pollution from 17:00 on the 11th to 15:00 on the 13th, and eventually stabilized as being dominated by coal combustion after 15:00 on the 13th. Based on the analysis of weather situation, wind speed and wind direction, it can be seen that the pollution process was inseparable from the unfavorable diffusion conditions. The simulated 48h backward trajectories were mainly divided into 4categories after clustering analysis, most of them came from Inner Mongolia, Jilin and other directions. PM2.5 exceeded the air quality standard for 70.83% of the trajectories, indicating the polluted air mass from these directions had a greater impact on the air quality of Harbin. Through the PSCF and CWT analysis of the simulated 48h backward trajectory, it was found that the WPSCF and WCWT distribution characteristics in Harbin were similar. The high values of WPSCF and WCWT were mainly concentrated in Harbin's Shuangcheng, Bayan, Acheng, Jilin Province's central and western regions, as well as Daqing and Suihua, indicating that these areas were the potential source areas of PM2.5 in Harbin.
王醒, 李莉莉, 王琨, 刘玉萍, 贾琳琳, 姜珺秋, 朱莉娜. 哈尔滨市一次大气污染过程及潜在源分析[J]. 中国环境科学, 2019, 39(11): 4502-4510.
WANG Xing, LI Li-li, WANG Kun, LIU Yu-ping, JIA Lin-lin, JIANG Jun-qiu, ZHU Li-na. An air pollution process and potential sources of Harbin. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(11): 4502-4510.
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