CO2 flux measurements by chambers on sea ice during expedition PS122 (MOSAiC Legs 1−5) to the central Arctic in October 2019−September 2020 ...

• Main Authors: Nomura, Daiki, Angelopoulos, Michael, Stephens, Mark, Zhan, Liyang, D'Angelo, Alessandra, Chamberlain, Emelia, Yoshimura, Masaki, Delille, Bruno
• Format: Dataset
• Language: unknown
• Published: PANGAEA 2024
• Subjects: Arctic Ocean; CO2 flux; gas exchange; Mosaic; Sea ice; seasonal variability; Event label; DATE/TIME; LATITUDE; LONGITUDE; Site; Condition; Snow depth; Type of chamber; Carbon dioxide, flux; Air-sea ice CO2/CH4 flux chamber system; Snow sampler glove; Chamber for gas sampling; Ice corer; Cavity Ring-Down Spectrometer CRDS, PICARRO, G2132-i; PS122/1; PS122/2; PS122/3; PS122/4; PS122/5; Polarstern; Multidisciplinary drifting Observatory for the Study of Arctic Climate MOSAiC; Arctic
• Online Access: https://dx.doi.org/10.1594/pangaea.966833; https://doi.pangaea.de/10.1594/PANGAEA.966833

The CO2 fluxes were measured over the surfaces of snow, ice, water with LI-COR 8100-104 chambers connected to a LI-8100A soil CO2 flux system (LI-COR Inc., USA) during expedition PS122 (MOSAiC Legs 1−5) to the central Arctic in October 2019−September 2020. A chamber was connected via a closed loop to an infrared gas analyzer (LI-8100A, LI-COR Inc., USA) to measure CO2 concentrations with an air pump at a rate of 3 L min−1 during 20-minute intervals. Power was supplied by a battery (8012−254, Optima Batteries Inc., USA). We also used a Teflon-coated metal chamber (0.50 m in diameter and 0.30 m high with a serrated bottom edge) (Nomura et al., 2010, 2012). Every 5 or 10 minutes during an experiment, about 500 mL of air was collected from the chamber using a 50-mL glass syringe with a three-way valve and then transferred to a 3000-mL Tedlar bag (AAK 3L, GL Sciences Inc., Japan). After collection, air samples were quickly transported in a dark container to a laboratory onboard the R/V Polarstern, which was ...