Dataset Restricted Access
Haumann, F. Alexander; Leonard, Katherine; Meredith, Michael P.; Arrowsmith, Carol; Gorodetskaya, Irina V.; Hutchings, Jennifer; Lehning, Michael; Leng, Melanie J.; Stammerjohn, Sharon; Tsukernik, Maria; Weber, Yvonne
This data set contains oxygen and hydrogen isotope measurements from discrete seawater samples that were collected in the Southern Ocean (south of 30 deg S) during the Antarctic Circumnavigation Expedition (ACE). 637 samples were collected during the period December 24th, 2016 and March 18th, 2017 in the Southern Ocean from the surface ocean using the ship's underway line (UW; 338 samples) and in vertical profiles using Niskin bottles mounted on the CTD rosette (287 samples). A few additional samples were collected from a parallel cast with a trace-metal rosette, with a bucket, and from the surface of a tabular iceberg. All samples were analyzed for their oxygen isotopic composition (reported as permille deviation of the oxygen-18 to oxygen-16 ratio from VSMOW2: DEL18O) and a few samples (80) from the Pacific sector were analyzed for their hydrogen isotopic composition (reported as permille deviation of the hydrogen to deuterium ratio from VSMOW2: DELD) by mass spectrometry at the British Geological Survey. This circumpolar data set provides insights into the hydrological cycle of the Southern Ocean and the processes (precipitation, evaporation, sea-ice melting and freezing, iceberg and land-ice melting) that determine the salinity of a certain water mass.
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Benetti, M., Sveinbjörnsdóttir, A.E., Ólafsdóttir, R., Leng, M.J., Arrowsmith, C., Debondt, K., Fripiat, F., and Aloisi, G. (2017): Inter-comparison of salt effect correction for δ18O and δ2H measurements in seawater by CRDS and IRMS using the gas-H2O equilibration method. Marine Chemistry 194: 114-123. http://doi.org/10.1016/J.MARCHEM.2017.05.010
Epstein, S. and Mayeda, T. (1953): Variation of O18 content of waters from natural sources. Geochimica et Cosmochimica Acta 4 (5): 213-224. http://doi.org/10.1016/0016-7037(53)90051-9
INTERNATIONAL ATOMIC ENERGY AGENCY, Reference Sheet for VSMOW2 and SLAP2 International Measurement Standards. IAEA, Vienna, 8 pp. (Rev 1 dated 2017-07-11). Available online: https://nucleus.iaea.org/rpst/ReferenceProducts/ReferenceMaterials/Stable_Isotopes/2H18O-water-samples/VSMOW2.htm
Meredith, M. P., Venables, H. J., Clarke, A., Ducklow, H. W., Erickson, M., Leng, M. J., Lenaerts, J. T. M., and Van Den Broeke, M. R. (2013): The freshwater system west of the Antarctic Peninsula: Spatial and temporal changes. Journal of Climate 26 (5): 1669-1684. http://doi.org/10.1175/JCLI-D-12-00246.1
Walton, D. W. H. and Thomas, J. (2018, November 22). Cruise Report - Antarctic Circumnavigation Expedition (ACE) 20th December 2016 - 19th March 2017 (Version 1.0). Swiss Polar Institute. http://doi.org/10.5281/zenodo.1443511