Ambient air sulfur dioxide mole fractions measured in the Swiss container during MOSAiC 2019/2020 ...

• Main Authors: Angot, Hélène, Beck, Ivo, Jokinen, Tuija, Laurila, Tiia, Quéléver, Lauriane, Schmale, Julia
• Format: Dataset
• Language: English
• Published: PANGAEA 2022
• Subjects: central Arctic Ocean; MOSAiC20192020; MOSAiC_ATMOS; Polarstern; sulfur dioxide; DATE/TIME; LATITUDE; LONGITUDE; Event label; Sulfur dioxide, dry-air mole fraction; Flag, pollution; Flag, below detection limit; Trace gas monitor; Pulsed fluorescence SO2 analyzer, model 43i Thermo Fisher Scientific; PS122/1; PS122/2; PS122/3; PS122/4; PS122/5; Multidisciplinary drifting Observatory for the Study of Arctic Climate MOSAiC; Arctic; Arctic Ocean; Beck
• Online Access: https://dx.doi.org/10.1594/pangaea.944270; https://doi.pangaea.de/10.1594/PANGAEA.944270

This dataset contains minute-averaged sulfur dioxide mole fractions measured during the year-long Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition from October 2019 to September 2020. The measurements were performed in the Swiss container on the D-deck of Research Vessel Polarstern. Data were collected by pulsed fluorescence using a Thermo Fisher Scientific instrument (model 43i). The minute-resolution mole fractions were adjusted after cross-evaluation against a certified sulfur dioxide standard at the end of the expedition at the Swiss Laboratories for Materials Science and Technology (EMPA). Spikes due to local anthropogenic pollution sources (e.g., exhaust by the vessel's engine and vents, skidoos, helicopters, on-ice diesel generators) were identified and flagged as follows. For each data point, the gradient (time derivative) was calculated (Beck et al., 2022). Data points corresponding to an abnormally high gradient (> 1.5 times the interquartile range) and ... : We used 1 sec time resolution positional data from the following datasets: PS122/1: Rex, M (2020), PS122/2: Haas, C (2020), PS122/3: Kanzow, T (2020), PS122/4: Rex, M (2021a), PS122/5: Rex, M (2021b) ...