Abstract:Number concentrations of atmospheric particles were measured in the suburban area of Qingdao in the spring of 2010. Size distributions of number concentrations of atmospheric particles were investigated in terms of impacts of meteorological conditions (e.g., Micaps weather charts and the calculated air mass back trajectories) and various air mass origins. The results showed that number concentrations of particles at 0.3~1.0μm size range slightly increased since 12 hours prior to the dust events, then reduced by 20%~45% during dust events. However, number concentrations of particles > 1.0μm increased by a factor of 1~10 times during the dust events. Rainfall was found to remove more than 50% of particles >1.0μm from the atmosphere. It is interesting that number concentrations, especially in the submicron size range, increased rapidly post the rain. During fog and haze events, there were a significant increase of <1.0μm particles in number concentration. The increase was more obvious for 0.7~1.0μm particles in fog days and 0.5~0.7μm particles during haze events. The particle number concentrations and size distributions were also likely related to air mass trajectories. Air mass originated from Mongolia contains more super micron particles while the particles from the local air mass were mainly distributed in the <0.7μm size range.
李瑞芃, 石金辉, 张代洲. 天气条件及气团来源对青岛春季大气颗粒物数浓度谱分布的影响[J]. 中国环境科学, 2012, 32(8): 1392-1399.
LI Rui-Peng, SHI Jin-Hui, ZHANG Dai-Zhou. Size distribution of atmospheric particles in number concentration in relation to meteorological conditions and air mass origins in Qingdao in spring. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(8): 1392-1399.