西北师范大学学报（自然科学版）2017，Vol.53Issue(5)：128-134,7.DOI:10.16783/j.cnki.nwnuz.2017.05.022
用于气溶胶吸湿性测量的HTDMA系统设计及外场观测研究
Design of a HTDMA system for the measurement of aerosolhygroscopic properties and its applicationin Shouxian County observation
摘要
Abstract
A hygroscopic tandem differential mobility analyzer(HTDMA) is designed and constructed.The hygroscopicity of submicron particles in Shouxian is studied in July 2016,and the HTDMA is applied to measure the hygroscopic properties for particles with dry diameter between 50~250 nm.The statistical results show that,the average growth factor(FG) of the aerosol presents a distinct bimodal distribution.For the less-hygroscopic component,the FG is 1.07,and for more-hygroscopic compound,the FG is between 1.373~1.560 and positively correlated with the particle size.After humidification,the average spectral distribution of the peak value of the local polydisperse aerosol shows a slight increase with bimodal distribution,indicating the hygroscopic ability of different diameter particles are different,and the proportion of less-and more-hygroscopic component are also different.The difference between the spectral distribution of aerosols at different time(day and night) reflects the different source of aerosols.The less-hygroscopic components mainly come from local emissions and the more-hygroscopic components mainly come from distance transport.关键词
气溶胶/吸湿性/粒径谱/HTDMAKey words
aerosol/hygroscopicity/size distribution/HTDMA分类
资源环境引用本文复制引用
钱小东,鲍健,黄勇,邓学良,童应祥..用于气溶胶吸湿性测量的HTDMA系统设计及外场观测研究[J].西北师范大学学报（自然科学版）,2017,53(5):128-134,7.基金项目
国家自然科学基金资助项目(41330424) （41330424）
