生态环境学报2016，Vol.25Issue(11)：1760-1766,7.DOI:10.16258/j.cnki.1674-5906.2016.11.004
成都市空气质量指数与雾霾的关系研究
The Relational Study of Chengdu AQI and Haze
摘要
Abstract
The daily data of Chengdu AQI and the hourly concentration data of six indexes combined with the data of the air visibility and the relative humidity are collected and analyzed in this paper.Besides,this paper adopts the non-linear fitting methods to study the relationship between the Chengdu AQI and haze,and respectively discusses the relationship between the visibility and relative humidity,and the relationship between the visibility and AQI.The results show that the present AQI index conditions of Chengdu are closely related with the particle pollution,and that the trends of AQI indexes in 2013 and 2014 are basically the same,for between April and September in these two years the pollution is mostly mild and the indexes are both rather low;however the indexes reach its peak in the autumn and winter.Moreover,the monthly AQI in 2014 is generally lower than that in 2013,thus reflecting the improvement of air quality in a way.Besides,the trends of the average air visibility of these two years are also basically the same with better air quality in spring and summer while with poor air conditions in autumn and winter.Moreover,with the gradual increase of relative humidity,the nonlinear interaction coefficient between the air visibility and AQI is gradually increasing and is provided with relatively preferable relativity.Under different air quality degrees,the nonlinear interaction coefficient between the relative humidity and the visibility is generally higher than the linearly dependent coefficient between them.Besides,the obtained nonlinear model of AQI and haze has common accuracy in judging haze days but has high degree of accuracy in judging fog days with the annual average accuracy rate reaching more than ninety-eight percent.This high accuracy can be embodied apparently in autumn and winter when the fitting value one hundred percent coincides with the observed results.Simultaneously,this model is relatively accurate in judging haze days and non-haze days.In autumn and winter especially when haze is prevalent,the accuracy reaches eighty-nine point four four percent and ninety-two point seven eight percent.And the accuracy in judging haze days can even reach as high as eighty-eight point eight nine percent and eighty-five percent.Moreover,the quarterly model is more accurate than the yearly model in the seasonal judgment.关键词
空气质量指数(AQI)/雾霾/大气能见度/大气相对湿度/非线性模型Key words
AQI/haze/air visibility/relative air humidity/non-linear model分类
资源环境引用本文复制引用
李云祯,周平,陈军辉,徐友..成都市空气质量指数与雾霾的关系研究[J].生态环境学报,2016,25(11):1760-1766,7.基金项目
国家环境保护公益性行业科研专项(201509024) （201509024）
四川省科技厅公益性科研院所基本科研项目(2016YSKY0167) （2016YSKY0167）
成都市科技惠民技术研发项目(2015-HM01-00019-SF) （2015-HM01-00019-SF）
成都市软科学研究项目(2015-RK00-00016-ZF) （2015-RK00-00016-ZF）
