Collaborative Research: Submicron Organic Aerosol Measurements During ACE-Asia

这项与普林斯顿大学林恩·罗素合作的研究项目是对有机物种在大气颗粒物中的作用进行的调查。在ACE-Asia实地计划期间，将从船上(NOAA R/V Brown)和飞机(NCAR C-130)测量东亚外流中的气溶胶有机物。测量包括：1)使用热光检测技术的半连续元素/有机碳(EC/OC)分析，以及2)用于傅立叶变换红外光谱分析的时间积分滤片样品。EC/OC的测量为燃烧排放在采样的空气质量中的作用提供了一个重要的指标。FTIR有机分析描述了有机物种的质量，并根据官能团和在不同极性的溶剂中的溶解度对这些物种进行了分类。这提供了有关有机化合物的质量分数的信息，这些有机化合物是水溶性的，有助于增强颗粒对水的吸收。不溶于颗粒水相的疏水有机部分也将被定量。

This collaborative research project with Lynn Russell, Princeton University, is an investigation of the role of organic species in atmospheric particles. Measurements of aerosol organics in east Asian outflow will be made from shipboard (NOAA R/V Brown) and aircraft (NCAR C-130), during the ACE-Asia field program. The measurements include: 1) semi-continuous elemental/organic carbon (EC/OC) analysis using a thermo-optical detection technique, and 2) time-integrated filter samples for analysis by Fourier Transform Infrared spectroscopy. The EC/OC measurements provide an important indicator for the role of combustion emissions in the air masses sampled. The FTIR organic analyses describe the mass of organic species and classify those species by functional group and solubility in solvents of different polarity. This provides information about the mass fraction of organic compounds that are water-soluble and contribute to enhanced water uptake by particles. The hydrophobic organic fraction that does not dissolve in the particulate aqueous phase will also be quantified.