Noble gas (He, Ne isotopes) and transient tracer (CFC-12, SF6) measurements from POLARSTERN cruise PS111 (Weddell Sea, 2018) ...

• Main Authors: Huhn, Oliver, Rhein, Monika, Bulsiewicz, Klaus, Sültenfuß, Jürgen
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Antarctica; CFC12; He; Helium; Ne; Neon; noblegas; Polarstern; PS111; SF6; transient tracer; Weddell Sea; Event label; Date/Time of event; Latitude of event; Longitude of event; Elevation of event; Bottle number; DEPTH, water; Pressure, water; Freon-12 dichlorodifluoromethane; Quality flag; Sulfur hexafluoride, SF6; Helium-4; δ Helium-3; CTD/Rosette; Gas chromatographic GC separation on a capillary column, electron capture detection ECD; Quality flag according to WOCE; Ultra high vacuum UHV mass spectrometry; Weddell; Antarc*
• Online Access: https://dx.doi.org/10.1594/pangaea.930718; https://doi.pangaea.de/10.1594/PANGAEA.930718

Noble gases (3He, 4He, 20Ne, 22Ne)The water samples for stable noble gas isotopes (3He, 4He, 20Ne, 22Ne) were stored from the CTD/water bottle system without contact to atmospheric air and preventing air bubbles into gas tight copper tubes, which are clamped of at both sides.In the IUP Bremen noble gas lab the samples were pre-processed with a UHV (ultra high vacuum) gas extraction system. Sample gases are transferred via water vapor into a glass ampoule kept at liquid nitrogen temperature. For analysis of the noble gas isotopes the glass ampoules are connected to a fully automated UHV mass spectrometric system equipped with a two stage cryogenic system. Regularly, the system is calibrated with atmospheric air standards (reproducibility <0.2%). Also measurement of line blanks and linearity are done. The performance of the Bremen facility is described in Sültenfuß et al. (2009).The total errors for the noble gas measurements are estimated to be < 0.5 % for 4He, < 0.5 % for total Ne, and < 0.5% for ... : 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 2 = goodflag 3 = doubtfulflag 4 = badflag 6 = mean of replicatesflag 9 = no measurement (then, the data value is missing) ...