2020年昆明市环境空气质量及分析

Ambient Air Quality and Analysis of Kunming City in 2020

本文利用2020年昆明市主城区国控点监测数据,分析昆明市环境空气质量现状、变化特征。2020年昆明市环境空气质量总体较好,六项污染物年平均浓度值均达到《环境空气质量标准》(GB3095-2012)二级标准要求。AQI、主要污染物浓度呈夏秋季偏低、冬春季偏高的特征。国控点环境空气质量日均值优良率为99.2%~100.0%,首要污染物主要为O_(3)和PM_(10),偶尔出现为PM_(2.5);超标污染物为O_(3)、PM_(10)。运用Pearson相关系数分析主要污染物相关性,有效控制NO_(2)、CO浓度,可以降低超标污染物浓度,可能提高昆明市空气质量。

This paper uses the monitoring data of national control points in 2020 to analyze the ambient air quality of Kunming City.In 2020,the ambient air quality of Kunming was generally good,and the annual mean concentration of six pollutants met the Grade II standard of"Ambient Air Quality Standard"(GB3095-2012).The AQI and concentration of main pollutants was characterized by low in summer and autumn and high in winter and spring.The average daily excellent rate of ambient air quality in national control points was 99.2%~100.0%,the primary pollutants were O_(3) and PM_(10),occasionally appear as PM_(2.5);the non-attainment pollutants were O_(3) and PM_(10).Using Pearson correlation coefficient to analyze the correlation of main pollutants,controlling the concentration of NO_(2) and CO can effectively reduce the concentration of non-attainment pollutants,which may improve the air quality in Kunming City.