2018年昆明市空气质量状况研究

2018年昆明市空气质量状况研究摘要：本文根据2018年昆明市7个测站点的6个空气质量指标数据，经相关性分析、聚类分析、主成分分析和时间尺度分析，揭示了2018年昆明市环境空气质量状况的时空差异性，最后分析了污染的成因。结果表明：7个监测点中呈贡新区和西山森林公园两个监测点的空气质量状况最优，空气质量级别为I级：金鼎山监测点空气质量状况最差，空气质量级别为Ⅱ级。东风东路和碧鸡广场两站点间相关性最强，而关上和龙泉镇两站点间相关性最弱。在6个空气指标中，O3和SO2的相关性最低，PM1o和PM25的相关性最高：工业企业排污和机动车尾气排放是影响昆明市空气质量的两个主要的污染源：7个监测点可聚类归为三大类，第一类为空气清洁对照点，包括呈贡新区和西山森林公园：第二类为机动车尾气排放区，包括碧鸡广场、东风东路和关上；第三类为工业污染排放区包括金鼎山和龙泉镇：根据箱式图结果，西山森林公园6种污染物均在3-5月月均浓度最高：东风东路监测点在冬、春两季，O3和NO2、PM25、PM1o月均浓度最高，CO在全年浓度都很高：金鼎山2-4月，PM25、PM1o、O3和CO月均浓度较高，且该点除了O3,其余5种污染物的浓度均高于西山森林公园和东风东路污染物的浓度值。关键字：空气质量相关性分析聚类分析主成分分析时间尺度分析Abstract:Based on the 6 air quality index data from 7 measuring stations inKunming in 2018,correlation analysis,cluster analysis,principal component analysisand time scale analysis will be conducted in this paper to reveal the spatio-temporaldifference of air quality in Kunming.At the same time,the causes of pollution canalso be analyzed.The results show that the air quality in Chenggong new area andXishan forest park is the best among the 7 measuring stations,and their air qualitylevel is level I But Jindingshan station's air quality is bad,the air quality level islevel II.Dongfeng east road station and Biji square station have high significantcorrelation,while Guanshang station and Longquan town station have no significantcorrelation.Of the six air quality index,O3 and SO2 have no significant correlation,while PMio and PM2s have high significant correlation.Exhaust emission fromindustrial enterprises and vehicle are two major pollution sources affecting air qualityin Kunming.The 7 measuring stations can be grouped into three categories:The first