摘要
随着城市化和工业化的发展,空气质量逐渐下降,空气污染问题越来越突出。选取2014-2022年重庆市空气质量指数数据和6项主要污染物浓度数据,分析在该时间段内的年度、季度、月度变化特征和趋势,并对空气质量与6种污染物的相关性、首要污染物进行研究。结果表明:2014-2022年重庆市环境空气质量得到明显改善,2022年空气质量指数(AQI)整体优良率达91.23%;AQI值总体呈现下降趋势。除臭氧外其他5种污染物浓度均呈现下降趋势,季节尺度上PM_(2.5)、PM_(10)、SO_(2) 、CO、NO_(2) 浓度呈现冬季重,夏季轻现象,臭氧则相反;在月尺度上PM_(2.5)、PM_(10)的浓度均呈“U”形分布,O_(3) 则呈倒“U”形分布。AQI值与PM_(2.5)、PM_(10)、CO呈显著正相关,与O_(3) 呈现负相关,且相关性不显著,夏季相关性最显著。此外近年来臭氧逐渐成为影响空气质量的关键指标。
With the development of urbanization and industrialization,air quality is gradually declining,and air pollution problems are becoming increasingly prominent.This paper selects the air quality index data and concentration data of six major pollutants in Chongqing from 2014 to 2022,analyzes the annual,quarterly,and monthly changes and trends during this time period,and studies the correlation between air quality and six pollutants,as well as the primary pollutants.The results indicate that,from 2014 to 2022,the environmental air quality in Chongqing has significantly improved,with an overall excellent air quality index(AQI)rate of 91.23%in 2022;The overall AQI value shows a downward trend.Except for O_(3) ,the concentrations of the other five pollutants show a decreasing trend at the seasonal scale.PM_(2.5),PM_(10),SO_(2) ,CO and NO_(2) shows a phenomenon of being heavy in winter and light in summer;the concentrations of the O_(3) is the opposite;On a monthly scale,PM_(2.5) and PM_(10) exhibit a U-shaped distribution;O_(3) shows an inverted U-shaped distribution.The AQI value is significantly positively correlated with PM_(2.5),PM_(10) and CO,while negatively correlated with O_(3) ,and the correlation is not significant.The correlation is most significant in summer.In addition,in recent years,ozone has gradually become a key indicator affecting air quality.
作者
张春艳
Zhang Chunyan(Chongqing Wanzhou District Planning and Design Institute,Chongqing 400000,China)
出处
《绿色科技》
2024年第10期149-155,共7页
Journal of Green Science and Technology
关键词
空气质量
污染物
特征分析
相关性分析
air quality
pollutants
feature analysis
correlation analysis
作者简介
张春艳(1992-),女,硕士,工程师,研究方向为测绘与地理信息技术、数据分析与挖掘、土地利用变化、国土空间规划等。
