The neodymium isotope fingerprint of Adélie coast bottom water
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Published version
Author(s)
Type
Journal Article
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.
Date Issued
2018-10-28
Online Publication Date
2018-10-28
2018-12-18T12:23:03Z
Date Acceptance
2018-09-27
ISSN
0094-8276
Publisher
American Geophysical Union
Start Page
11247
End Page
11256
Journal / Book Title
Geophysical Research Letters
Volume
45
Issue
20
Copyright Statement
©2018. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Source Database
manual-entry
Sponsor
Natural Environment Research Council (NERC)
Natural Environment Research Council (NERC)
Grant Number
NE/J021636/1
NE/N001141/1
Subjects
MD Multidisciplinary
Meteorology & Atmospheric Sciences
Publication Status
Published
Date Publish Online
2018-10-01