大气颗粒物理化特征和影响效应的研究进展及展望

大气颗粒物，尤其是细颗粒物PM_2.5，是有毒和有害物质的载体，对人体健康具有重要的影响，同时大气颗粒物具有吸湿性、光学吸收和散射能力以及云凝结核活性等，对环境和气候变化具有重要的作用，大气颗粒物进一步的长距离输送还会对区域和全球地球化学循环产生重要影响.总结了当前大气颗粒物的物理化学特征研究进展，分析了离线和在线分析技术在大气颗粒物主要组分检测中的应用，阐述了大气颗粒物源解析技术的应用现状，以及由于大气颗粒物污染对环境、气候、人体健康和地球化学循环等产生的影响，最后展望未来大气颗粒物研究的重点问题. 

Physicochemical Characteristics and Effects of Airborne Particles: Research Progress and Prospects

Airborne particulate matter, especially the fine particles PM_2.5, is an important component of ambient air. Airborne particles have serious impacts on human health due to their association with toxic matters. They can also exert important effects on environment and climate through hygroscopic growth, cloud condensation nuclei activity and light absorption and scattering. The long range transport of particulate matter can affect the regional and global geochemical cycle. In this paper, physical and chemical characteristics of airborne particles are discussed and the on-line and off-line analytical techniques are introduced. In addition, application of source apportionment methods has been evaluated and the effects of airborne particles on environment, climate, human health, and global geochemical cycle have been expounded. Finally, the research prospect of airborne particles is presented.