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Stable Oxygen Isotope data (delta-18O) from the RV Polarstern cruise ARKXXII/2 (IPY/GEOTRACES)

Responsible investigator

Dr Dorothea Bauch
email: dbauch@geomar.
GEOMAR Helmholtz Centre for Ocean Research Kiel
Wischhofstr. 1-3
24148 Kiel
Germany

Data contributor

Dr Michiel Rutgers van der Loeff
email: Michiel.Rutgers.v.d.Loeff@awi.de
AWI marine geochemistry
Alfred-Wegener Institute for Polar and Marine Research
Am Handelshafen 12
27570 Bremerhaven
Germany

Laboratory of analysis

Leibniz Laboratory (Kiel, Germany)

Acquisition description

Water samples were collected during expedition ARKXXII/2 onboard RV Polarstern (PS70). Samples for stable oxygen isotope analysis were taken with a standard rosette, and a subset of 38 vertical profiles were taken, using an ultra-clean Titanium-rosette with 12 L bottles (De Baar et al., 2008). Oxygen isotopes from all samples were analyzed at the Leibniz Laboratory (Kiel, Germany) applying the CO2- water isotope equilibration technique on at least 2 sub-samples on a Finnigan gas bench II unit coupled to a Finnigan DeltaPlusXL. The overall measurement precision for delta 18O analysis is ± 0.03 ‰ or smaller. The 18O/16O ratio is given versus V-SMOW in the usual delta-notation (Craig, 1961).

Oxygen isotopes (delta 18O) data collected in the upper 150 m water depth are published in Bauch et al. (2011), Klunder et al. (2012) and Roeske et al. (2012). The oxygen isotopes data below 150 m are unpublished. Please contact Dorothea Bauch dbauch@geomar.de before using this data.

A mass-balance calculation based on oxygen isotopes, salinity and nutrients fraction of marine and fresh water masses can be calculated (Bauch et al., 2011). Please contact Dorothea Bauch (dbauch@geomar.de) for this additional data.

References Cited

De Baar, H.J.W., Timmermans, K.R., Laan, P., De Porto, H.H., Ober, S., Blom, J.J., Bakker, M.C., Schilling, J., Sarthou, G., Smit, M.G., Klunder, M., 2008. Titan: A new facility for ultraclean sampling of trace elements and isotopes in the deep oceans in the international Geotraces program. Marine Chemistry 111 (1-2), 4-21.

Craig, H., 1961. Standard for reporting concentrations of Deuterium and Oxygen-18 in natural waters. Science 133, 1833-1834.

Bauch, D., M. Rutgers van der Loeff, N. Andersen, S. Torres-Valdes, K. Bakker, and E. P. Abrahamsen, 2011. Origin of freshwater and polynya water in the Arctic Ocean halocline in summer 2007, Progress in Oceanography, 482-495, doi:410.1016/j.pocean.2011.1007.1017

Klunder, M. B., Bauch, D., Laan, P., de Baar, H. J. W., van Heuven, S. and Ober, S. 2012. Dissolved iron in the Arctic shelf seas and surface waters of the central Arctic Ocean: Impact of Arctic river water and ice-melt, J. Geophys. Res., 117(C1), C01027, doi:10.1029/2011jc007133, doi:10.1029/2011jc007133.

Roeske, T., Bauch, D., Loeff, M. R. van der and Rabe, B. 2012. Utility of dissolved Ba in distinguishing North American from Eurasian runoff in the light of its part in biogeochemical cycling of the Arctic Ocean, Marine Chemistry, doi.org/10.1016/j.marchem.2012.01.007, 132-133, 1-14.

Bauch, D., Torres-Valdes, S., Polyakov, I., Novikhin, A., Dmitrenko, I., McKay, J. and Mix, A. 2014. Halocline water modification and along-slope advection at the Laptev Sea continental margin, Ocean Sci., 10(1), 141-154, doi:10.5194/os-10-141.

BODC Data Processing Procedures

Data were submitted to BODC in a csv format. Sample metadata provided (Station, CTD cast, lat, lon, depth, date and bottle number) were checked against information held in the database and the cruise report, no discrepancies were found.

The mapping between the originator's channels and BODC parameter codes is detailed in the table below.

Data Quality Report

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