Isotope tracers (Delta δ¹³C) in Weddell Sea water during POLARSTERN cruise ANT-XII/3 ...

• Main Author: Mackensen, Andreas
• Format: Dataset
• Language: English
• Published: PANGAEA 2001
• Subjects: Event label; Date/Time of event; Latitude of event; Longitude of event; Elevation of event; DEPTH, water; δ13C, dissolved inorganic carbon; δ18O, water; Δδ13C; Multiple investigations; Mass spectrometer Finnigan MAT 251; Calculated; ANT-XII/3; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Ice Shelf; Weddell Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.55750; https://doi.pangaea.de/10.1594/PANGAEA.55750

Stable oxygen isotopic composition of sea water and stable carbon isotopes of dissolved inorganic carbon (DIC) on the continental shelf in the southern Weddell Sea are presented. Using the stations sampled during the summer 1995 two sections can be constructed, one closely parallel to the ice shelf edge and the other perpendicular to the upper continental slope. Generally, delta18O values clearly separate between different shelf water masses depending on the content of meteoric meltwater added during melting of glacial ice. Extrapolation of the mixing line between the cores of High Salinity Shelf Water (HSSW) and supercooled Ice Shelf Water (ISW) reveals delta18O values of the glacial ice of -27 per mil, whereas extrapolation of the mixing line between the delta18O values of the most-saline HSSW and lowest temperature ISW results in delta18O values of -34 per mil for glacial ice. These values point to an origin of meltwater from below the ice shelf, where ice is less depleted in 18O, since deep beneath the ... : Supplement to: Mackensen, Andreas (2001): Oxygen and carbon stable isotope tracers of Weddell Sea water masses: new data and some paleoceanographic implications. Deep Sea Research Part I: Oceanographic Research Papers, 48(6), 1401-1422 ...