Abstract. Volatile Organic Compounds (VOCs) have direct influences on air quality and climate. They indeed play a key role in atmospheric chemistry, as precursors of secondary pollutants, such as ozone (O₃) and secondary organic aerosols (SOA). To this respect, long-term datasets of in-situ atmospheric measurements are crucial to characterize the variability of atmospheric chemical composition, its sources and trends. The on-going establishment of the Aerosols, Cloud, and Trace gases Research InfraStructure (ACTRIS) allows implementing the collection and provision of such high-quality datasets. In this context, online and continuous measurements of O₃, nitrogen oxides (NO_X) and aerosols have been carried out since 2012 at the SIRTA observatory, located in the Paris region, France. Within the last decade, VOC measurements have been conducted offline at SIRTA, until the implementation of a real-time monitoring which started in January 2020, using a Proton-Transfer- Reaction Quadrupole Mass-Spectrometer (PTR-Q-MS). The dataset acquired during the first two years of online VOC measurements provides insights on their seasonal and diurnal variabilities. The additional long-term datasets obtained from co-located measurements (NO_X, aerosol physical and chemical properties, meteorological parameters) are used to better characterize the atmospheric conditions and to further interpret the obtain results. Results also include insights on VOC’s main sources and the influence of meteorological conditions and air mass origin on their levels, in the Paris region. Due to the COVID-19 pandemic, the year 2020 notably comprised a quasi-total lockdown in France in Spring, and a lighter one in Autumn. Therefore, a focus is made on the impact of these lockdowns on the VOC variability and sources. A change in the behaviour of VOC markers for anthropogenic sources was observed during the first lockdown, reflecting a change in human activities. This dataset could be further used as input for atmospheric models and can be found under https://doi.org/10.14768/f8c46735-e6c3-45e2-8f6f-26c6d67c4723 (Simon et al, 2022).

中文翻译：

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在 SIRTA（法国巴黎地区）使用质子转移反应质谱法对挥发性有机化合物进行了两年的在线原位测量

摘要。挥发性有机化合物 (VOC) 对空气质量和气候有直接影响。它们确实在大气化学中发挥着关键作用，作为二次污染物的前体，例如臭氧 (O ₃ ) 和二次有机气溶胶 (SOA)。在这方面，现场大气测量的长期数据集对于表征大气化学成分的变化、其来源和趋势至关重要。气溶胶、云和微量气体研究基础设施 (ACTRIS) 的持续建立允许实施此类高质量数据集的收集和提供。在这种情况下，O ₃、氮氧化物（NO _X) 和气溶胶自 2012 年以来一直在位于法国巴黎地区的 SIRTA 天文台进行。在过去十年中，VOC 测量一直在 SIRTA 离线进行，直到 2020 年 1 月开始使用质子转移反应四极质谱仪 (PTR-Q-MS) 实施实时监测。在前两年在线 VOC 测量中获得的数据集提供了有关其季节性和昼夜变化的见解。从同一地点的测量获得的额外长期数据集（NO _X, 气溶胶物理和化学性质, 气象参数) 用于更好地表征大气条件并进一步解释获得的结果。结果还包括对巴黎地区 VOC 主要来源的见解，以及气象条件和气团起源对其水平的影响。由于 COVID-19 大流行，2020 年尤其包括春季在法国的准全面封锁和秋季较轻的封锁。因此，重点关注这些封锁对 VOC 可变性和来源的影响。在第一次封锁期间观察到人为来源的 VOC 标记物的行为发生变化，反映了人类活动的变化。该数据集可进一步用作大气模型的输入，可在 https://doi.org/10 下找到。