Mathematics – Logic
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3312606v&link_type=abstract
Geophysical Research Letters, Volume 33, Issue 12, CiteID L12606
Mathematics
Logic
4
Geochemistry: Radiogenic Isotope Geochemistry, Oceanography: General: Water Masses, Oceanography: Physical: Deep Recirculations, Oceanography: Biological And Chemical: Chemical Tracers, Geographic Location: Antarctica (4207)
Scientific paper
Wilkes Land-Adélie Coast Bottom Water encompasses the bottom waters formed around the coast of East Antarctica in the area east of Prydz Bay and west of the Ross Sea (90°E-150°E). Here we show that these bottom waters have not only characteristic physical properties, but also carry a distinct radiogenic isotope signal that traces their dispersal. The Nd, Hf and Pb isotopic compositions of Circum-Antarctic ferromanganese nodules record the isotopic composition of ambient seawater. Those with the lowest Nd and Hf isotopic ratios and the highest Pb isotopic ratios are from the deep Australian-Antarctic Basin, and they fingerprint Wilkes Land-Adélie Coast Bottom Water. The data illustrate the potential value of these isotope systems as tracers of present and past deep and bottom waters in the Circum-Antarctic realm and elsewhere.
Abouchami Wafa
Goldstein Steven L.
Hemming Sidney R.
van de Flierdt Tina
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