ATom: Volatile Organic Compounds (VOCs) from the TOGA instrument, Version 2

This dataset provides concentrations of volatile organic compounds (VOCs) measured by the Trace Organic Gas Analyzer (TOGA) during the four ATom campaigns. These data are relevant to the impact of human-produced air pollution on greenhouse gases and on chemically reactive gases in the atmosphere. Specific data were obtained for radical precursors, tracers of anthropogenic and biogenic activities, tracers of urban and biomass combustion emissions, products of oxidative processing, precursors to aerosol formation, and compounds important for aerosol modification and transformation. TOGA measures a wide range of VOCs with high sensitivity (ppt or lower), frequency (2-minutes), accuracy (often 15% or better), and precision (<3%).

本数据集提供了痕量有机气体分析仪（Trace Organic Gas Analyzer，TOGA）在四次ATom观测任务中测得的挥发性有机化合物（volatile organic compounds，VOCs）浓度数据。此类数据与人为源空气污染对温室气体及大气中化学反应性气体的影响密切相关。具体观测数据涵盖自由基前体、人为与生物源活动示踪剂、城市及生物质燃烧排放示踪剂、氧化过程产物、气溶胶形成前体，以及对气溶胶改性与转化具有重要意义的各类化合物。该分析仪可实现多种挥发性有机化合物的高灵敏度检测（灵敏度可达万亿分之一ppt或更低），采样频次为每2分钟1次，准确度通常优于15%，精密度小于3%。