Observations of air quality on the outskirts of an urban agglomeration during the implementation of pollution reduction measures

Developmental Biology

Tao Song¹  Yang Sun¹  Junke Zhang¹  Tingting Liao²  Yuepeng Pan¹  Yuesi Wang¹ 

[1] State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100191, China$$;Plateau Atmospheric and Environment Key Laboratory of Sichuan Province, College of Atmosphere Sciences, Chengdu University of Information Technological, Chengdu, 610225, China$$

关键词: Ozone;    PM2.5;    PMF;    NOZ;    OPE;   

DOI  :  10.5094/APR.2014.088

学科分类：农业科学（综合）

来源: Dokuz Eylul Universitesi * Department of Environmental Engineering

【 摘 要 】

Based on observations at Heshan, a boundary area in the city agglomeration of the Pearl River Delta region in China, atmospheric pollutants such as PM_2.5, O₃, CO, SO₂, NO_Z, NO₂ and NO were monitored between the 12^th and 29^th November, 2010. Meteorological parameters, including temperature, humidity, dew point, air pressure, ultraviolet light, wind direction, and wind speed were also measured. By combining the meteorological parameters with the atmospheric pollutant data, we performed Positive Matrix Factorization (PMF) and ozone production efficiency (OPE) analysis to objectively understand the interrelations among the pollutants, as well as between the pollutants and the meteorological factors. During the observation period, there were various meteorological changes such as rainfall, cold air transit, and sunshine that created conditions for the formation or dispersal of pollutants. The study period coincided with the 16^th Asian Games, during which time the government adopted strict measures to reduce the discharge of pollutants around the Pearl River Delta area. However, we still observed serious pollution of PM_2.5 and O₃, of which the highest value of PM_2.5 was 210 μg m⁻³ and the highest value of O₃ reached 117 ppb. At the same time, the high concentrations of CO, NO, NO₂, NO_Z, and SO₂ could not be cleared away with rainfall in such a short period of time. On the basis of PMF analysis, we found that three factors influence the air quality of this region: local biomass burning, secondary pollutants of regional transport, and high industrial pollutant emissions. According to OPE analysis, the O₃ pollution was mostly found to be VOC–sensitive but occasionally NO_X–sensitive for OPE values greater than 10.

【 授权许可】

Unknown   

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