Particulate matter trends and quantification of the spring sand-dust contribution in Hohhot,Inner Mongolia,from 2013 to 2017 |
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| Authors: | Wenkang Gao Lingyun Zhu Zhanyun Ma Qingxian Gao Xuepu Yu Sufen Wu Yu Gu |
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| Affiliation: | 1. State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Science, Beijing, China;2. Environmental Monitoring Center Station of Inner Mongolia Autonomous, Hohhot, China;3. Shanxi Province Institute of Meteorological Sciences, Shanxi Provincial Meteorological Bureau, Taiyuan, China;4. Chinese Research Academy of Environmental Sciences, Beijing, China;5. Chifeng Ecological Environment Monitoring Centre, Chifeng, China;6. Shanxi Province Changzhi Meteorological Bureau, Changzhi, China |
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| Abstract: | On 10 September 2013,the State Council promulgated the Action Plan for the Prevention and Control of Air Pollution(hereinafter referred to as the Action Plan).To study the variations in the air pollutant concentrations in Hohhot during the implementation of the Action Plan and the effects of various measures,the daily concentrations of air pollutants(fine particulate matter(PM2.5),inhalable PM(PM10),SO2,and NO2)in Hohhot published by the China Environmental Monitoring Station were obtained to analyze the general meteorological conditions in Inner Mongolia from 2013 to 2017.The variations and causes of the ambient PM concentration in Hohhot were examined,and the quantitative influence of sandstorms on the ambient PM concentration in Hohhot was analyzed by selecting the spring season with frequent sandstorms as an example.The results showed the following.(1)The air quality in Hohhot continuously improved,and compared with those in 2013,the PM2.5 and PM10 concentrations decreased by 24.6％and 48.2％,respectively,in 2017.However,the air pollutant concentrations remained high,with the average PM2.5 and PM10 concentrations exceeding the national secondary standards by 22.9％and 35.7％,respectively.(2)The reductions in the spring PM2 5 and PM10 concentrations were 5.6％and 8.9％,respectively,and the annual decreases in the PM2.5 and PM10 concentrations were 3.6 and 15.1 μg m-3 yr-1,respectively,from 2013 to 2017.(3)The absolute contribution ranges of dust weather to the concentrations of PM2.5,PM10,and TSP during 2013-17 were 0.6-5.2 μg m-3,9.0-16.9 μg m-3,and 14.7-30.0 μg m-3,respectively,in Hohhot during the spring. |
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| Keywords: | Air pollution prevention and control action plan Air pollution Spring Sand-dust Hohhot |
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