2017-2021年虹口区空气质量变化趋势及特征分析

Analysis of the Trend and Characteristics of Air Quality in Hongkou District From 2017 to 2021

分析了虹口区2017~2021年环境空气质量变化趋势和特征,对二氧化硫(SO_(2))、二氧化氮(NO_(2))、可吸入颗粒物(PM_(10))、细颗粒物(PM_(2.5))、一氧化碳(CO)和臭氧(O_(3))6种污染物在该段时间内的年均、月均浓度变化规律进行了研究。结果表明:2017~2021年,虹口区环境空气质量得到明显改善,2021年空气质量指数(AQI)整体优良率达到90.9%,臭氧成为影响AQI优良率的关键性指标。SO_(2)、NO_(2)、PM_(10)、PM_(2.5)、CO月均浓度呈现春冬季高、夏秋季低的趋势,O_(3)浓度水平受到温度影响,春夏季月均浓度明显高于秋冬季,季节性变化规律显著。2017~2021年虹口区经环保投入与5项污染物(SO_(2)、PM_(10)、PM_(2.5)、CO、O_(3))未见显著相关性,与NO_(2)浓度呈现显著负相关关系,NO_(2)浓度数据随环保投入的增加得到一定改善。

This study analyzes the trends and characteristics of changes in air quality in Hongkou District from 2017 to 2021,focusing on six pollutants,namely sulfur dioxide(SO_(2)),nitrogen dioxide(NO_(2)),inhalable particulate matter(PM_(10)),fine particulate matter(PM_(2.5)),carbon monoxide(CO),and ozone(O_(3)).The overall air quality in Hongkou District has significantly improved during the period,with the annual average air quality index(AQI)reaching 90.9%in 2021,and ozone becoming a key factor affecting AQI.The monthly average concentrations of SO_(2),NO_(2),PM_(10),PM_(2.5),and CO show a trend of higher levels in spring and winter,and lower levels in summer and autumn,while O_(3)concentrations are influenced by temperature,with higher levels in spring and summer than in autumn and winter,showing significant seasonal variations.There is no significant correlation between the environmental investment and the concentrations of five pollutants(SO_(2),PM_(10),PM_(2.5),CO,and O_(3))in Hongkou District from 2017 to 2021.However,there is a significant negative correlation between NO_(2)concentration and environmental investment,indicating some improvement in NO_(2)concentration with increased environmental investment.