ATom: Ultra-High Sensitivity Aerosol Spectrometer Calibration and Performance Data

This dataset provides extensive calibration and in-flight performance data for two Ultra-High Sensitivity Aerosol Spectrometers (UHSAS) used for particle size distribution and volatility measurements during the NASA Atmospheric Tomography Mission (ATom) airborne campaign. UHSAS-1 was equipped with a compact thermodenuder operating at 300 degrees C and UHSAS-2 was operated without a thermodenuder to determine the number and volume fraction of volatile particles. Laboratory studies utilized aerosols from limonene ozonolysis (limon), atomization of ammonium sulfate (AS), and atomization of 2-diethylhexyl (dioctyl) sebacate (DOS). Data include: UHSAS detection efficiency, sizing calibration, performance at a range of pressures and at a range of thermodenuder temperatures, comparison of UHSAS-2 and condensation particle counter (CPC) particle number concentrations, comparisons of UHSAS-1 and UHSAS-2 for dry particle number concentration, surface area and volume collected onboard of a NASA DC-8 aircraft during August 2016, and dry aerosol size distributions for thermodenuded and non-thermodenuded instrument collected in February 2017.

该数据集提供了两台超高灵敏度气溶胶光谱仪（Ultra-High Sensitivity Aerosol Spectrometers，UHSAS）的全面校准数据及飞行中性能数据，这两台仪器用于美国国家航空航天局大气层析成像任务（NASA Atmospheric Tomography Mission，ATom）机载科学考察期间的粒子粒径分布和挥发性测量。UHSAS-1配备了一台工作温度为300摄氏度的紧凑型热脱附器（thermodenuder），而UHSAS-2未配备热脱附器，旨在测定挥发性粒子的数量分数和体积分数。实验室研究使用了以下来源的气溶胶：柠檬烯臭氧化反应产物（limon）、硫酸铵（ammonium sulfate，AS）雾化产物，以及癸二酸二（2-乙基己基）酯（2-diethylhexyl sebacate，DOS，又称二辛基癸二酸酯）雾化产物。数据集包含以下内容：UHSAS的检测效率、粒径校准数据、不同压力及不同热脱附器温度下的性能数据、UHSAS-2与凝结核粒子计数器（condensation particle counter，CPC）测得的粒子数量浓度对比数据、2016年8月在NASA DC-8飞机上采集的UHSAS-1与UHSAS-2干粒子数量浓度、表面积及体积的对比数据，以及2017年2月通过经热脱附和未经热脱附的仪器采集的干气溶胶粒径分布数据。