Neodymium isotopic characterization of Ross Sea Bottom Water and its advection through the southern South Pacific, POLARSTERN cruise ANT-XXVI/2 ...

• Main Authors: Basak, Chandranath, Pahnke, Katharina, Frank, Martin, Lamy, Frank, Gersonde, Rainer
• Format: Dataset
• Language: English
• Published: PANGAEA 2014
• Subjects: Event label; Date/Time of event; Latitude of event; Longitude of event; DEPTH, water; Salinity; Temperature, water, potential; Density, sigma-theta 0; Neutral density; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, error; ε-Neodymium; ε-Neodymium, standard deviation; ε-Neodymium, error; Neodymium, dissolved; Neodymium, dissolved, standard error; Comment; CTD/Rosette; CTD; Calculated; see references; ANT-XXVI/2; Polarstern; Antarc*; Antarctic; Ross Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.834728; https://doi.pangaea.de/10.1594/PANGAEA.834728

Since the inception of the international GEOTRACES program, studies investigating the distribution of trace elements and their isotopes in the global ocean have significantly increased. In spite of this large-scale effort, the distribution of neodymium isotopes (143Nd/144Nd) and concentrations ([Nd]) in the high latitude south Pacific is still understudied. Here we report dissolved Nd isotopes and concentrations from 11 vertical water column profiles from the south Pacific between South America and New Zealand. Results suggest that Ross Sea Bottom Water (RSBW) is represented by an epsilon-Nd value of ~ -7, and is thus more radiogenic than Circumpolar Deep Water (epsilon-Nd ~ -8). RSBW and its characteristic epsilon-Nd signature can be traced far into the SE Pacific until progressive mixing with ambient Lower Circumpolar Deep water (LCDW) dilutes this signal north of the Antarctic Polar Front (APF). The SW-NE trending Pacific-Antarctic Ridge restricts the advection of RSBW into the SW Pacific, where bottom ... : Supplement to: Basak, Chandranath; Pahnke, Katharina; Frank, Martin; Lamy, Frank; Gersonde, Rainer (2015): Neodymium isotopic characterization of Ross Sea Bottom Water and its advection through the southern South Pacific. Earth and Planetary Science Letters, 419, 211-221 ...