Noble gas (He, Ne isotopes) and transient tracer (CFC-11 and CFC-12) measurements from POLARSTERN cruise PS100 (northeast Greenland, 2016) ...

• Main Authors: Huhn, Oliver, Rhein, Monika, Bulsiewicz, Klaus, Sültenfuß, Jürgen
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: CFC11; CFC12; He; Helium; Ne; Neon; noblegas; Northeast Greenland; Polarstern; PS100; transient tracer; Event label; Date/Time of event; Latitude of event; Longitude of event; Elevation of event; Bottle number; DEPTH, water; Pressure, water; Freon-11 trichorofluoromethane; Quality flag; Freon-12 dichlorodifluoromethane; Helium-4; δ Helium-3; CTD/Rosette; CTD Large; Gas chromatographic GC separation on a capillary column, electron capture detection ECD; Quality flag according to WOCE; Ultra high vacuum UHV mass spectrometry; Priority Programme 1889 Regional Sea Level Change and Society SPP1889; Greenland; Fram Strait; glacier
• Online Access: https://dx.doi.org/10.1594/pangaea.931336; https://doi.pangaea.de/10.1594/PANGAEA.931336

Noble gases (3He, 4He, 20Ne, 22Ne)In total we took 650 water samples for stable noble gas isotopes (3He, 4He, 20Ne, 22Ne) in copper tubes from 69 stations in Fram Strait, on the north-eastern Greenland shelf and nearby 79 North Glacier (79NG, Nioghalvfjerdsbræ). The water samples 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 vapour 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 ... : 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) ...