Spatio-temporal Changes of Air Quality in Harbin City during Spring Festival

GUO Xinqiao; WAN Luhe; YANG Xu

doi:10.3969/j.issn.1003-6504.2017.07.003

Abstract：Air quality monitoring data of the Spring Festival (7-13 February,2016) collected from 11 Harbin municipal monitoring stations were analyzed regarding six major pollutant parameters in terms of spactio-temporal characteristics,which were compared with the monitoring data collected during the period without firecrackers setting-off;furthermore,combined with meteorological data during snowing weather,the effects of snowfall on the air pollutants were discussed.The results showed that PM2.5 and PM10 pollution was particularly serious in Xiangfang District of Harbin during the Spring Festival,while NO2 pollution the most serious in Acheng District,SO2 pollution in Daowai District,and CO and O3 in Pingfang District;fireworks and firecrackers setting-off greatly increased PM2.5,PM10 and SO2 concentrations,causing air quality rapid deterioration on the Lunar New Year Eve,the concentrations doubled,till the early morning of Lunar New Year Day when three kinds of air pollutant concentration went up to a maximum value;however,the impacts of the setting-off of fireworks and firecrackers on NO2,CO and O3 were relatively small.In conclusion,the discharge of fireworks and firecrackers made the greatest contribution to the extent of gaseous pollutants SO2,and secondly,the atmosphere coarse PM (the fine PM less);snowfall was conducive to the removal of the pollutants,particularly,among others,the atmospheric particles (coarse more than fine),but removal of the gaseous pollutants was less.From the spatial perspectives the effect of snowing weather on the removal of atmospheric PM was higher at the suburban areas and urban fringe than that in the downtown area.