南通大学学报（自然科学版）2018，Vol.17Issue(4)：48-55,8.
南京市一次大气污染事件时空演化特征及影响因素
Temporal and Spatial Evolution Characteristics and Influencing Factors of One Air Pollution Event in Nanjing
摘要
Abstract
The air quality index (AQI) in 2015 and the data of the pollutant index on January 21st to 27th were analyzed by the means of mathematical statistics and backward trajectory to study the time and spatial characteristics and influencing factors of atmospheric pollution in Nanjing. It is revealed that in 2015, the number of the days that AQI index reached the degree of pollution is the most at Ruijin Rode site and Maigao bridge site, while it is the least at Xuanwu Lake site;AQI index is high in autumn and winter, and it is low in spring and summer. It is inferred that AQI index in Nanjing is mainly determined by area pollution discharge at different functional area and weather changes in different seasons. In the air pollution event from January 21st to January 27th, AQI index is the highest at Xianlin campus which is 211.094;AQI is the lowest at Xuanwu Lake which is 168.881. The average concentration of PM10 at Aoti centre is the highest which is 229.472, it is the lowest at Xuanwu Lake which is 179.932. The dimensional distributing feature of PM2.5 is the same as that of PM10. The spatial distribution of concentration of SO2, NO2 and O3 has no much difference. During the event, the general trend of AQI index is on the fluctuating rise, it appears3 peak values on 21st, 24th and 26th, and it declines on 25th and 27th. The changing trend of concentration of PM10, PM2.5, NO2 is related to the AQI, while the changing trend of concentration of O3 is negative to AQI. Therefore, the air pollution in Nanjing has obvious regional characteristics in space and cumulative feature in time, and it is affected by weekend effect and the influence of weather. The pollution is automobile exhaust emission, coal-burning and waste gas emission. The back trajectories of pollution show that air pollution is mainly from Nanjing and north-west China.The changing of wind direction of air on 25th resulted in the level of the pollution dropping, so refer that air pollution is comprehensively affected by air pollution in air mass from other places and weather change.关键词
大气污染事件/时空分布/轨迹分析/影响因素/南京Key words
air pollution event/time and space distribution/trajectory analyze/influence factors/Nanjing分类
资源环境引用本文复制引用
张雨梦,钱鹏,查书平..南京市一次大气污染事件时空演化特征及影响因素[J].南通大学学报（自然科学版）,2018,17(4):48-55,8.基金项目
国家自然科学基金项目(41671003) （41671003）
