Year-round trace gas measurements in the central Arctic during the MOSAiC expedition

• Published in: Scientific Data
• Main Authors: Angot, Helene, Blomquist, Byron, Howard, Dean, Archer, Stephen, Bariteau, Ludovic, Beck, Ivo, Boyer, Matthew, Crotwell, Molly, Helmig, Detlev, Hueber, Jacques, Jacobi, Hans-Werner, Jokinen, Tuija, Kulmala, Markku, Lan, Xin, Laurila, Tiia, Madronich, Monica, Neff, Donald, Petäjä, Tuukka, Posman, Kevin, Quelever, Lauriane, Shupe, Matthew D., Vimont, Isaac, Schmale, Julia
• Other Authors: Faculty of Science, Institute for Atmospheric and Earth System Research (INAR), Polar and arctic atmospheric research (PANDA), Department of Physics
• Format: Article in Journal/Newspaper
• Language: English
• Published: Nature Publishing Group 2023
• Subjects: Kcl-coated denuders; Atmospheric mercury; Air-pollution; Data quality; Co2; Accuracy; Photochemistry; Identification; Methane; Trends; 114 Physical sciences; Arctic
• Online Access: http://hdl.handle.net/10138/354410

Despite the key role of the Arctic in the global Earth system, year-round in-situ atmospheric composition observations within the Arctic are sparse and mostly rely on measurements at ground-based coastal stations. Measurements of a suite of in-situ trace gases were performed in the central Arctic during the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition. These observations give a comprehensive picture of year-round near-surface atmospheric abundances of key greenhouse and trace gases, i.e., carbon dioxide, methane, nitrous oxide, ozone, carbon monoxide, dimethylsulfide, sulfur dioxide, elemental mercury, and selected volatile organic compounds (VOCs). Redundancy in certain measurements supported continuity and permitted cross-evaluation and validation of the data. This paper gives an overview of the trace gas measurements conducted during MOSAiC and highlights the high quality of the monitoring activities. In addition, in the case of redundant measurements, merged datasets are provided and recommended for further use by the scientific community. Peer reviewed