摘要大气中PM25的污染特征分析是大气污染的防控的科学基础及重要依据。本文根据福建省2015-2019年大气中PM25的质量浓度月均值，分析大气中细颗粒物的浓度的时空特征及其影响因素，本课题主要研究内容和研究结果有：(1)对福建省环境质量月报进行的研究性分析，根据月度变化，季节性变化以及年际变化，从而得出福建省M25的变化特征以及时空分布特征。(2)福建省M25的质量浓度变化存在明显的时空变化现象。总体大气状况以优良为主，春天污染比较严重，其次是冬天与夏天，秋天的污染最轻。同时，根据大气指数可以观察到福建省沿海地区的污染程度会高于内陆地区。(3)通过数据分析和影响因素的分析，可以得出PM25的质量浓度与气温、风速、极端天气、降雨量以及湿度有着很大的关系，与气温呈负相关，极端天气在一定程度上对污染有一定的缓解作用，相对湿度及降雨量呈负相关。关键词：PM25;质量浓度；污染特征；影响因素；雾霾1AbstractThe analysis of PM2s pollution characteristics in the atmosphere can providescientific basis for the prevention and control of air pollution.Based on the monthlymean of PM2smass concentration in the atmosphere from 2015 to 2019 in fujianprovince,this paper analyzed the temporal and spatial characteristics of theconcentration of fine particulate matter in the atmosphere and its influencing factors.The main research contents and results obtained are as follows:(1)A research-based analysis of the monthly environmental quality report offujian province was conducted to obtain the change characteristics and spatial andtemporal distribution characteristics of PM2s in fujian province based on the monthly,seasonal and annual changes.(2)There is a significant spatiotemporal change in the PM2.5 mass concentrationin Fujian Province.The overall atmospheric condition is mainly good,with moreserious pollution in spring,followed by winter and summer,and the lightest pollutionin autumn.At the same time,according to the atmospheric index,it can be observedthat the pollution level of coastal areas of Fujian Province will be higher than that ofinland areas.(3)Through data analysis and analysis of influencing factors,it can be concludedthat the mass concentration of PM2.5 has a great relationship with air temperature,wind speed,extreme weather,rainfall and humidity,and is negatively correlated withtemperature,extreme weather is to a certain extent The above has a certain mitigatingeffect on pollution,and the relative humidity and rainfall are negatively correlated.Key words:PM2s;mass concentration;pollution characteristics;influencing factors;haze2目录1绪论…41.1研究背景1.1.1PM2s的来源与形成41.1.2PL2s对生活环境的影响551.2国内外研究现状......1.2.1国内研究现状61.2.2国外研究现状1.3.1研究意义61.3.2研究目的·71.4研究内容和技术路线1.4.1研究内容71.4.2技术路线72研究区域、研究方法介绍92.1.1自然环境概况92.1.2能源消耗概况.·92.1.3区域工业概况102.2评价标准与数据来源102.2.1评价标准....10111112123.2时空变化特征123.2.1月度变化..123.2.2季节性变化..163.2.3年际变化203.2.4空间变化213.3污染因素的相关性分析.2233.1温度.…22233.3.3降水量与湿度243.4章节小结.…4结论与展望27274.1.1时空分布特征.4.1.2气象因子的影响288参考文献…29致谢…303