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Abstract

Adélie Land Bottom Water (ALBW), a variety of Antarctic Bottom Water formed off the Adélie Land coast of East Antarctica, ventilates the abyssal layers of the Australian sector of the Southern Ocean as well as the eastern Indian and Pacific Oceans. We present the first dissolved neodymium (Nd) isotope and concentration measurements for ALBW. The summertime signature of ALBW is characterized by εNd = −8.9, distinct from Ross Sea Bottom Water, and similar to Weddell Sea Bottom Water. Adélie Land Shelf Water, the precursor water mass for wintertime ALBW, features the least radiogenic Nd fingerprint observed around Antarctica to date (εNd = −9.9). Local geology around Antarctica is important in setting the chemical signature of individual varieties of Antarctic Bottom Water, evident from the shelf water signature, which should be considered in the absence of direct wintertime observations.

Item Type:	Article
Authors/Creators:	Lambelet, M and van de Flierdt, T and Butler, ECV and Bowie, AR and Rintoul, SR and Watson, RJ and Remenyi, T and Lannuzel, D and Warner, M and Robinson, LF and Bostock, HC and Bradtmiller, LI
Keywords:	neodymium isotopes, Adélie Land Bottom Water, Australian Sector of the Southern Ocean, Antarctica
Journal or Publication Title:	Geophysical Research Letters
Publisher:	Amer Geophysical Union
ISSN:	0094-8276
DOI / ID Number:	https://doi.org/10.1029/2018GL080074
Copyright Information:	Copyright 2018 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
Related URLs:	Google Scholar: Bowie, AR UTAS Profile: Bowie, AR UTAS Profile: Remenyi, T Google Scholar: Lannuzel, D UTAS Profile: Lannuzel, D
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