Volatile Organic Compounds and Meteorological Conditions in the Missouri Ozark AmeriFlux (MOFLUX) Site, 2023

This data set contains measurements of atmospheric components and meteorological conditions of central Missouri, United States during the summer of 2023. Data serve to examine the impact of meteorological conditions relevant to future climate on the emission and transformation of volatile organic compounds (VOCs). During the field campaign, researchers were also able to incorporate opportunistic analyses of the long-range transport of smoke plumes generated from extreme forest fire activities in Canada. VOC measurements were conducted at the Missouri Ozark AmeriFlux (MOFLUX) site (latitude 38.7441, longitude −92.2000) using a proton transfer reaction time of flight mass spectrometer (PTR-ToF-MS 6000 X2). The sampling campaign was conducted during the summer of 2023 (2023-06-25 to 2023-08-12) with measurements being taken at high temporal resolution (1 hour). Particular VOCs analyzed include: Methanol, Acetonitrile, Acetone, Isoprene, Methylvinyl ketone (MVK) and methacrolein (MACr), Benzene, Toluene, Catechol, and Monoterpene. Meteorological parameters included in this dataset were collected from a nearby Columbia Regional Airport (~10 km). Global solar radiation data were measured at a weather site in Ashland, MO, 5.22 km from the MOFLUX tower. The data were accessed using the MesoWest online website (https://mesowest.utah.edu/) provided by the Department of Atmospheric Sciences, University of Utah. Discussion of the data providers, database, and dissemination were highlighted in prior studies (Horel et al., 2002a; Horel et al., 2002b) . Smoke mixing ratios (in mg m−3) were estimated from the High-Resolution Rapid Refresh (HRRR) 3 km weather model for Missouri at 6-hour intervals (Dowell et al., 2022). This dataset contains three data files in comma separate (*.csv) format. Additional metadata are provided: three data dictionaries and a file-level metadata file in comma separate (*.csv) format and a user guide in PDF (*.pdf) format.本数据集收录了2023年夏季美国密苏里州中部的大气组分与气象条件实测数据，旨在探究与未来气候相关的气象条件对挥发性有机物（volatile organic compounds, VOCs）排放与转化过程的影响。在外场观测活动期间，研究团队还同步开展了加拿大极端森林火灾产生的烟羽长距离输送的机遇性分析。 挥发性有机物的实测工作于密苏里奥索卡AmeriFlux（MOFLUX）观测站点（纬度38.7441，经度-92.2000）开展，采用质子转移反应飞行时间质谱仪（proton transfer reaction time of flight mass spectrometer, PTR-ToF-MS 6000 X2）完成数据采集。本次采样时段为2023年夏季（2023年6月25日至2023年8月12日），采用1小时的高时间分辨率进行观测。 本次分析的目标挥发性有机物包括：甲醇、乙腈、丙酮、异戊二烯、甲基乙烯基酮（methylvinyl ketone, MVK）与甲基丙烯醛（methacrolein, MACr）、苯、甲苯、儿茶酚以及单萜类化合物。 本数据集包含的气象参数取自附近的哥伦比亚地区机场（距离约10公里）。全球太阳辐射数据则由距MOFLUX观测塔5.22公里的密苏里州阿什兰气象站点测得。上述气象数据通过犹他大学大气科学系提供的MesoWest在线平台（https://mesowest.utah.edu/）获取。相关数据提供者、数据库及分发方式的细节已在既往研究中详述（Horel et al., 2002a; Horel et al., 2002b）。 烟羽混合比（单位：mg·m⁻³）通过针对密苏里州的高分辨率快速刷新（High-Resolution Rapid Refresh, HRRR）3公里气象模式以6小时间隔估算得到（Dowell et al., 2022）。 本数据集包含3个逗号分隔值（*.csv）格式的数据文件。附加元数据包括：3份数据字典、1份逗号分隔值（*.csv）格式的文件级元数据文件，以及1份PDF（*.pdf）格式的用户指南。