Article Spatiotemporal Characteristics of Air Pollutants (PM10, PM2.5, SO2, NO2, O3, and CO) in the Inland Basin City of Chengdu, Southwest China Kuang Xiao 1,2,*, Yuku Wang 2,*, Guang Wu 1, Bin Fu 2 and Yuanyuan Zhu 2 1 Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, Sichuan, China;
[email protected] 2 Institute of Mountain in Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China;
[email protected] (B.F.);
[email protected] (Y.Z.) * Correspondence:
[email protected] (K.X.);
[email protected] (Y.W.); Tel.: +86-028-8523- 0627 (Y.W.) Received: 4 October 2017; Accepted: 13 February 2018; Published: 16 February 2018 Abstract: Most cities in China are experiencing severe air pollution due to rapid economic development and accelerated urbanization. Long-term air pollution data with high temporal and spatial resolutions are needed to support research into physical and chemical processes that affect air quality, and the corresponding health risks. For the first time, data on PM10, PM2.5, SO2, NO2, O3 and CO concentrations in 23 ambient air quality automatic monitoring stations and routine meteorological were collected between January 2014 and December 2016 to determine the spatial and temporal variation in these pollutants and influencing factors in Chengdu. The annual mean concentrations of PM2.5 and PM10 exceeded the standard of Chinese Ambient Air Quality and World Health Organization guidelines standards at all of the stations. The concentrations of PM10, PM2.5, SO2 and CO decreased from 2014 to 2016, and the NO2 level was stable, whereas the O3 level increased markedly during this period.