Abstract
In order to understand the temporal-spatial patterns of air pollutants in Shanghai, the concentrations of six air pollutants (SO2, NO2, PM10, PM2.5, CO, O3) and air quality index (AQI) were analyzed. The results showed that, the percentage of excellent/good-AQI days was 70.7% during the whole year of 2015, and PM2.5, O3 and NO2 were the main air pollutants in Shanghai. Besides, the air quality in winter was most serious, followed by that in spring and autumn, and the air quality in summer was the best. From the perspective of spatial distribution, monitoring stations in YangpuSipiao and Putuo which were located in the urban area were affected by traditional industries and the air quality were poor, while those in Chuansha and Zhangjiang of Pudong which were located on the edge of the city showed relatively good air quality.
Highlights
For a better understanding on the mechanism of atmospheric pollution in China, it is indispensable to study the temporal and spatial differences of atmospheric pollution in typical cities
3.1 General air quality of Shanghai According to Technical Regulation for Ambient Air Quality Assessment (HJ 663—2013), in 2015, there were 258 days when air quality index (AQI) was excellent or good, which was one day less than in 2014
3.2 Daily change trends The results showed that the air quality of Shanghai showed obvious seasonal variation characteristics, with the most serious air pollution in winter, followed by spring and autumn, and the best was in summer. 300 250 200 150 100
Summary
For a better understanding on the mechanism of atmospheric pollution in China, it is indispensable to study the temporal and spatial differences of atmospheric pollution in typical cities. This article took Shanghai, where is of high intensity of human disturbance and has the background of rapid urbanization, as the research area. We conducted the research based on the atmospheric environment monitoring data which were collected following the new "Ambient Air Quality Standard" (GB3095-2012) in Shanghai in 2015. Six kinds of major air pollutants and air quality index (AQI) derived from ten automatic monitoring control points of environmental air quality in Shanghai were analyzed. The dominant air pollutants in Shanghai, their seasonal changes, change patterns, and spatial differentiation were evaluated and discussed. This research can provide the necessary reference for the public to be aware of the air quality in Shanghai and for the government to develop the air pollution control strategy
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