昆明市PM_(2.5)浓度时空变化特征及其与气象条件的关系  

Temporal and spatial distribution of PM_(2.5) concentration and the correlation of PM_(2.5) and meteorological factors in Kunming City

作　　者：张朝能[1] 王梦华[1] 胡振丹 袁园[1] 刘慧[1] 邱飞[2] 

机构地区：[1]昆明理工大学环境科学与工程学院,云南昆明650500 [2]云南省环境监测中心站,云南昆明650032

出　　处：《云南大学学报（自然科学版）》2016年第1期90-98,共9页Journal of Yunnan University(Natural Sciences Edition)

基　　金：云南省教育厅重大专项:昆明市空气质量预报研究

摘　　要：针对高原山地城市PM2.5的污染及防治问题,利用2014年4月—2015年3月昆明市主城区PM2.5小时浓度平均值及对应的气象参数连续观测资料,采用普通克里格插值法、非参数分析法对昆明市主城区PM2.5浓度时空特征及其与气象因素的影响进行了研究分析.研究结果表明:昆明市主城区PM2.5浓度季节高低为春季>冬季>秋季>夏季.PM2.5日变化趋势呈双峰单谷型,上午PM2.5浓度高于下午浓度,这种变化趋势与人们出行高峰和当天气象条件有关.普通克里格插值法得到昆明市PM2.5高浓度主要分布在主城区西北至东南一带,五华区、盘龙区浓度高于西山区、呈贡区.通过Spearman秩相关分析得出日均温度、气压、风速气象因子对环境PM2.5浓度的季节分布具有显著影响.To address PM2.5pollution problem and develop effective mitigation strategies in plateau mountainous city,the hourly average concentration of PM2.5and meteorological elements in Kunming from April 2014 to March 2015 have been taken to explore the temporal and spatial distribution of PM2.5concentrations and relationships between PM2.5concentrations and meteorological factors with the Original Kriging interpolation and nonparametric statistical analysis methods.Results show that PM2.5highest in spring followed in winter,and lower concentration in Kunming in the autumn and summer. The diurnal variation curves of PM2.5concentrations present bimodal and single valley with high concentration in a. m. and low in p. m. This trend varies with the morning rush hours and meteorological conditions of the same day.The Original Kriging interpolation results show that the high PM2.5concentration distributed in northwest part to southeast part of Kunming.And the PM2.5concentration of the Wuhua and Panlong districts is generally higher than that of the Xishan and Chenggong districts.By the Spearman rank correlation analyses,it has demonstrated that meteorological factors such as daily average temperature,atmospheric pressure and wind speed had significant influence on the concentration of PM2.5for the seasonal distribution.

关 键 词：PM2.5 时空分布 气象条件 克里格插值 

分 类 号：X513[环境科学与工程—环境工程]