Investigating Nd and Pb isotopes as paleoceanographic proxies in the Indian Ocean: influences of water mass sourcing and boundary exchange

Wilson, D. J. (2011) Investigating Nd and Pb isotopes as paleoceanographic proxies in the Indian Ocean: influences of water mass sourcing and boundary exchange. PhD thesis, Uiniversity of Cambridge.

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Abstract

Glacial-interglacial and orbital timescale changes in the water mass sourcing to the deep Indian Ocean are investigated over the period 0-250 ka BP from a neodymium (Nd), lead (Pb) and carbon isotope perspective. Since nutrient regeneration, in addition to water mass mixing, influences carbon isotopes in the deep Indo-Pacific, Nd isotopes, a water mass tracer with an ocean residence time of 500-1000 years, may provide a more conservative proxy for deep water circulation. A comparison of Nd and carbon isotope records may therefore provide evidence on deep ocean nutrient content and carbon storage, while Pb isotopes are investigated as a short residence time tracer (~ 50-200 years) which potentially responds to shorter path length circulation or local inputs.

Item Type: Thesis (PhD)
Uncontrolled Keywords: 2012AREP; thesis 2012;
Subjects: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Depositing User: Sarah Humbert
Date Deposited: 27 Mar 2012 14:44
Last Modified: 23 Jul 2013 10:03
URI: http://eprints.esc.cam.ac.uk/id/eprint/2433

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