Rapid Airborne Measurements of Bulk Aerosol Ionic Composition During Aerosol Characterization Experiment (ACE)-Asia

该项目支持在ACE亚洲（气溶胶特性实验）期间对大量气溶胶离子组成进行快速空中测量。C-130研究飞机上将安装一个自动化仪器。该仪器包括一个耦合到双通道离子色谱（IC）分析系统的液体中的颗粒采样器。以下离子可以在样品积分间隔内以约5 pptv的灵敏度和约4分钟的占空比进行测量：氯化物、硝酸盐、硫酸盐、钠、铵、钾和钙。颗粒被直接收集到液体中，该液体被在线连续地注入离子色谱仪。快速离子浓度测量将用于化学表征和研究从亚洲平流输送的气溶胶羽流的演变。另一个目标是通过同步空气中的化学和物理测量来量化离子成分对气溶胶光学特性的贡献程度。

This project supports rapid airborne measurements of bulk aerosol ionic composition during ACE-Asia (Aerosol Characterization Experiment). An automated instrument will be deployed on the C-130 research aircraft. The instrument consists of a particle-in-liquid sampler coupled to a dual channel ion chromatograph (IC) analysis system. The following ions can be measured with a sensitivity of about 5 pptv over a sample integration interval and duty cycle of about 4 minutes: chloride, nitrate, sulfate, sodium, ammonium, potassium, and calcium. Particles are collected directly into a liquid which is injected online and continuously into the ion chromatograph. The rapid ionic concentration measurements will be used to chemically characterize and study the evolution of the aerosol plumes advected from Asia. Another objective is to quantify the extent to which ionic components contribute to aerosol optical properties by synchronizing the airborne chemical and physical measurements.