Analysis of the pollution process in the Beijing-Tianjin-Hebei region during the Spring Festival of 2018
SUN Ting-ting1,2, ZHANG Tian-shu1,3, XIANG Yan1,3, Lü Li-hui1,3
1. Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Hefei, Hefei 230031, China;
2. University of Science and Technology of China, Hefei 230037, China;
3. Institutes of Physical Science and Information Technology, Anhui University, Hefei 230039, China
In order to investigate the air pollution condition in Beijing-Tianjin-Hebei area during the Spring Festival in 2018, the pollution process was comprehensively analyzed by using near-surface pollutant concentration data and lidar observation data combined with WRF meteorological elements, particulate matter transport flux and HYSPLIT air mass trajectory. The results showed that there were three pollution processes during the Spring Festival. The concentration of PM2.5 in each station did not exceed 200μg/m3 during the first pollution process before the Spring Festival. On New Year's Eve, the peak concentration of PM2.5 at Langfang Station reached 504μg/m3, 26 times that of clean weather. From the second to the fifth day of the Lunar New Year, the PM2.5 at each station was always higher than 120μg/m3, and the pollution was mainly concentrated below the height of 500 meters. There was high-altitude transportation in Beijing area, and the maximum transportation flux at 800 meters reaches 939μg/(m2·s). This heavy pollution process was a typical regional accumulation and transportation process. This study revealed that the Beijing-Tianjin-Hebei region is under strict control, and the peak concentration of PM2.5 when fireworks are set off can reach 3.2 times of that when no fireworks are set off. In order to prevent the occurrence of heavy pollution during the Spring Festival, preventive measures need to be taken for setting off fireworks and firecrackers in stable weather.
孙婷婷, 张天舒, 项衍, 吕立慧. 2018年春节期间京津冀地区污染过程分析[J]. 中国环境科学, 2020, 40(4): 1393-1402.
SUN Ting-ting, ZHANG Tian-shu, XIANG Yan, Lü Li-hui. Analysis of the pollution process in the Beijing-Tianjin-Hebei region during the Spring Festival of 2018. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(4): 1393-1402.
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