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Evidence for a major change in silicon cycling in the subarctic North Pacific at 2.73 Ma

Abstract:

The initiation of Northern Hemisphere glaciation in the subarctic North Pacific at ~2.73 Ma was marked by an abrupt cessation of high opaline accumulation, considered to result from an increased stratification of the water column that should have led to higher utilization of nutrients in the surface ocean. We present a new stable Si isotope-based record of Si utilization that is hard to reconcile with this model. A drop in 30Si/28Si by 0.4‰ at 2.73 Ma is coincident with an increase in bulk N ...

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Publication status:
Published

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Publisher copy:
10.1029/2007PA001563

Authors


Reynolds, BC More by this author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Earth Sciences
Journal:
PALEOCEANOGRAPHY
Volume:
23
Issue:
4
Pages:
n/a-n/a
Publication date:
2008-12-27
DOI:
ISSN:
0883-8305
URN:
uuid:ce72d06f-d2d9-44ec-8c8a-5d491ad87c84
Source identifiers:
82878
Local pid:
pubs:82878
Language:
English

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