The field-measured size-dependent volatility of ambient fine particles at different heating temperatures and the retrieval of aerosol chemical composition

The observations were conducted at the southeast of Beijing station (39.81°N, 116.48°E) during the winter period from January 28th to February 22nd, 2019, and the summer period from July 15th to August 7th, 2019. To obtain the volatile properties of aerosols by measuring the particle size of aerosols before and after heating using the VTDMA system at heating temperatures of 80, 150, 200, and 300 °C in winter and 25, 100, 200, and 300 °C in summer.本研究的观测实验于北京站东南侧（北纬39.81°，东经116.48°）开展，观测时段分为2019年冬季（1月28日至2月22日）与夏季（2019年7月15日至8月7日）。为获取气溶胶的挥发性特性，本研究采用挥发性串列差分迁移率分析仪（Volatile Tandem Differential Mobility Analyzer，VTDMA）系统，通过测量气溶胶在对应加热温度下加热前后的粒径完成表征；其中冬季实验设置的加热温度为80、150、200及300℃，夏季实验设置的加热温度为25、100、200及300℃。