气象科技进展Issue(1)：29-35,7.DOI:10.3969/j.issn.2095-1973.2014.01.004
北京上甸子典型天气个例的大气气溶胶数谱分布特征
The Characteristics of Particle Number Size Distribution under Typical Meteorological Conditions at Shangdianzi Regional Station in Beijing
摘要
Abstract
By using the instruments of Twin Differential Mobility Particle Sizer (TDMPS) system and an Aerodynamic Particle Sizer, measurements of particle number size distribution (PNSD) in the range of 3 nm~10 μm were taken at Shangdianzi Regional Station. Based on the dataset in 2008, the characteristics of particle number size distribution under different meteorological conditions such as dust storms, new particle formation events and haze days were investigated. On a dust storm day, the air mass originated from the northwest, with high wind speed. The coarse mode particle number concentration increased sharply and PM10 mass concentration could reach up to milligrams per cubic meter. A new particle formation event of a typical “banana shape” occurred when the atmosphere background was quite dry, clean and clear, with the air mass coming from the northeast. The nucleation mode particle could grow to a larger size, around 80 nm, having the potential to be activated as cloud condensation nuclei. A haze day usually occurred when southwest air mass arrived, along with the meteorological conditions of high humidity. The conditions favored ifne particles (<1μm) accumulating. The case study showed that the PNSD on a haze day was dominated by the accumulation mode and higher number concentration than a non-haze day. The mass concentration of PM2.5 could increase by 10 times on a haze day, which was mainly attributed to fine particles. On haze days, the accumulation mode particles, with a high number of concentration were mainly transported from the urban area. Thus the study of PNSD at rural sites could also provide information for analyzing the complex emission sources in the urban area.关键词
沙尘天气/干洁天气/雾/霾/气溶胶数谱分布/新粒子生成事件Key words
dust storm/dry and clean day/fog/haze/particle number size distribution/new particle formation event引用本文复制引用
沈小静,孙俊英,张养梅,张璐,周怀刚,周礼岩,董璠..北京上甸子典型天气个例的大气气溶胶数谱分布特征[J].气象科技进展,2014,(1):29-35,7.基金项目
资助信息国家重点基础研究发展计划（2011CB403401）；国家自然科学基金（41175113）、公益性行业（气象）科研专项（GYHY200906038， GYHY 201206037）；中国气象科学研究院基本科研业务费项目 （）
