讲座报告 Seminar
MEL Seminar: Relationships between molecular composition change and organic aerosol optical properties  

【时间 Time】:2019-1-10 (星期四) 10:00am-11:00am    【浏览次数 Count】:332   【发布时间 Updated】:2019-1-7
【地点 Venue】:周隆泉楼B3-204   B3-204 Zhou Long Quan Building
【主讲人 Speaker】:Yinon Rudich,Professor   
【来访单位 Institution】:Department of Earth and Planetary Sciences, Weizmann Institute, Rehovot,Israel     
【邀请人 Host】:汪冰冰  Bingbing Wang      【联络人 Contact】:黄迎   Ying Huang 2181571

Abstract:
The wavelength-dependence of the complex refractive indices (RI) in the visible spectral range of secondary organic aerosols (SOA) and of biomass burning aerosol, and the evolution of the RI with atmospheric aging are largely unknown. In this study, we apply a novel white light-broadband cavity enhanced spectroscopy to measure the changes in the RI (365−650 nm) of biogenic and anthropogenic SOA produced and aged in an oxidation flow reactor, simulating daytime aging under different NOx concentrations. In addition, we use novel new tar balls proxies to study the effect of atmospheric aging on the optical properties of biomass burning aerosols. Correlating the observed optical properties with aerosol mass spectrometer measurements allows to correlate changes in the chemical composition of the aerosols and their optical properties. Comparison with field samples will be presented.