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

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...

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Bibliographic Details
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
Description
Summary: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 ...

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