CCGS Amundsen underway gas measurements, 2018-2019 ...

• Main Authors: Tortell, Philippe, Izett, Robert
• Format: Dataset
• Language: unknown
• Published: Canadian Cryospheric Information Network 2020
• Subjects: Arctic Archipelago; Baffin Bay; Baffin; Canadian Arctic Archipelago; Davis Strait; Kennedy channel; Labrador Sea; Lancaster Sound; Nares strait; Queen Maud Gulf
• Online Access: https://dx.doi.org/10.5884/13172; https://www.polardata.ca/pdcsearch?doi_id=13172

Membrane inlet mass spectrometer (MIMS) and optode / gas tension device (GTD) gas systems were deployed on the CCGS Amundsen in 2018 and 2019. These autonomous sensors obtained measurements of dissolved O2, Ar, and N2 from the ship's underway seawater supply line at approximately 10-20 sec. intervals (<100 m spatial resolution). Raw and calibrated absolute gas concentrations, supersaturation anomalies, and gas ratios are reported. Data from the underway gas instrumentation were combined with hydrographic observations of surface and depth-resolved temperature and salinity (obtained by the Amundsen Science research group) collected via underway thermosalinograph (TSG) and Rosette-mounted conductivity-temperature-depth (CTD) instrumentation. ... : These underway, ship-based data, were collected using autonomous gas analyzers to observe spatial and temporal trends in surface dissolved gas (O2, Ar and N2) distributions throughout the waters of the pan-Canadian Arctic (including Labrador Sea, Davis Strait, Baffin Bay, and the Canadian Arctic Archipelago consisting of Lancaster Sound, Queen Maud Gulf, and the northern waters of Nares Strait and Kennedy Channel). Ultimately, these data will be combined with hydrographic observations to derive high spatial resolution estimates of surface waters net community production (i.e. photosynthesis minus respiration) over a multi-year period. ...