The Neodymium Isotope Fingerprint of Adélie Coast Bottom Water

M Lambelet, Tina van de Flierdt, ECV Butler, AR Bowie, SR Rintoul, RJ Watson, T Remenyi, D Lannuzel, M Warner, Laura Robinson, HC Bostock, LI Bradtmiller

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)
238 Downloads (Pure)

Abstract

Adélie Land Bottom Water (ALBW), a variety of Antarctic Bottom Water (AABW) 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 AABW, evident from the shelf water signature, which should be considered in the absence of direct wintertime observations.
Original languageEnglish
Pages (from-to)11247-11256
Number of pages10
JournalGeophysical Research Letters
Volume45
Issue number20
Early online date16 Oct 2018
DOIs
Publication statusPublished - 28 Oct 2018

Keywords

  • neodymium isotopes
  • Adélie Land Bottom Water
  • Australian sector of the Southern Ocean

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