Improving Characterization of Aerosol Optical Properties: Combined Measurements of Angle-resolved Scattering and Ultraviolet-visible Absorption

该项目致力于开发用于测量大气气溶胶光学性质的新型仪器。这些仪器将提供对气溶胶的光散射和吸收的测量，并能够更好地表征煤烟颗粒和含有黑色和棕色碳的颗粒。需要更好地了解大气气溶胶的光学性质，以便更准确地从地面和卫星上反演大气气溶胶数据，并开发改进的全球气候模式。这项研究将：(1)建立一个便携式三波长极光浊度计，测量粒子的光散射随角度和光偏振的变化；(2)通过在光声分光光度计(PAS)上增加近红外通道，建造一台UV PAS仪器，并建造一台热传感器以更好地测量吸收中的黑碳和棕碳成分，来扩展测量环境气溶胶吸收的能力，以及(3)更准确地测量碳烟(黑碳和黑碳)的光学性质，特别是与气溶胶涂层相关的那些性质。

This project focuses on the development of new instrumentation for measuring the optical properties of atmospheric aerosol. These instruments will provide measurements of light scattering and absorption by aerosols and enable better characterization of soot particles and particles containing black and brown carbon. A better understanding of the optical properties of atmospheric aerosol is needed for more accurate ground-based and satellite retrievals of data on atmospheric aerosols and for developing improved global climate models.This research will: (1) build a portable 3-wavelength polar nephelometer to measure light scattering by particles as a function of angle and light polarization; (2) expand the capabilities for measuring ambient aerosol absorption by adding a near-IR channel to a photoacoustic spectrophotometer (PAS), building a UV PAS instrument, and constructing a thermodenuder to better measure the black and brown carbon components of absorption, and (3) more accurately measure the optical properties of soot (black and black carbon) and especially those properties associated with aerosol coatings.