Impact of lateral transport on organic proxies in the Southern Ocean

Abstract Lateral transport of fine-grained organic carbon particles can complicate the interpretation of paleoclimate records based on organic proxies. Here we investigated the effect of lateral transport on newly developed temperature and soil organic matter proxies, TEX 86 and BIT index, respectiv...

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Bibliographic Details
Published in:Quaternary Research
Main Authors: Kim, Jung-Hyun, Crosta, Xavier, Michel, Elisabeth, Schouten, Stefan, Duprat, Josette, Sinninghe Damsté, Jaap S.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 2009
Subjects:
Southern Ocean
Indian
Online Access:http://dx.doi.org/10.1016/j.yqres.2008.10.005
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https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589400005810
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Summary:Abstract Lateral transport of fine-grained organic carbon particles can complicate the interpretation of paleoclimate records based on organic proxies. Here we investigated the effect of lateral transport on newly developed temperature and soil organic matter proxies, TEX 86 and BIT index, respectively, in core MD88–769 recovered from the South East Indian Ridge. Our results show that TEX 86 and BIT records in comparison to diatom and foraminifera records were representative for more local climate changes while alkenones and n -alkanes originated from distant areas by oceanic and atmospheric transport, respectively. This suggests that TEX 86 and BIT paleoclimate records are primarily influenced by local conditions and less subjected to long-distance lateral transport than other organic proxies in the Southern Ocean.

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