Chlorofluorocarbons, Noble Gases and Tritium measurements during POLARSTERN cruise ANT-XXII/3 - Filchner-Ronne Ice Shelf ...

• Main Authors: Roether, Wolfgang, Huhn, Oliver
• Format: Dataset
• Language: English
• Published: PANGAEA 2017
• Subjects: Event label; Date/Time of event; Latitude of event; Longitude of event; Elevation of event; DEPTH, water; Freon-11 trichorofluoromethane; Freon-12 dichlorodifluoromethane; Freon-113; Tetrachloromethane; Helium; δ Helium-3; Neon; Tritium; Bottle number; CTD/Rosette; ANT-XII/3; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Antarctic; Arctic; Ronne Ice Shelf; Antarc*; Filchner Ronne Ice Shelf; Filchner-Ronne Ice Shelf; Ice Shelf; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.883832; https://doi.pangaea.de/10.1594/PANGAEA.883832

The tracer data set was carefully checked for accurate measurements and outliers. According to the WOCE standards the following flags were applied to each measurement: ? = flag 3 = doubtful; / = flag 4 = bad, # = flag 6 = mean of replicates, * = flag 7 = air corrected.Methods Noble gases (3He, 4He, 20Ne) The water samples for helium isotopes and neon from the CTD-bottle-system are tapped in copper tubes, preventing air contamination and bubbles during the filling of the tubes and squeezed at both ends to keep them gas tight during transportation and storage. In the IUP Bremen noble gas lab the samples are processed in a first step with a UHV (ultra high vacuum) gas extraction system. The required vacuum conditions are achieved by a rotary pump and an oil diffusion pump. To maintain contamination-free samples, the extraction system is checked for leaks on each sample separately. Sample gases are transferred via water vapor into a glass ampoule kept at liquid nitrogen temperature. Quality checks of this sample ...