Paleosensitivity of hydrogen isotope ratios of long‐chain alkenones to salinity changes at the Chile Margin
Hydrogen isotope ratios of long‐chain alkenones (δ 2 H C37 ratios) have been shown to correlate with salinity in several culture studies. However, it is uncertain how applicable the δ 2 H C37 ‐salinity relationship is to reconstruct past salinity. The δ 2 H C37 ratios were measured on sediments from...
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ftnioz:oai:imis.nioz.nl:313355 2023-05-15T18:00:59+02:00 Paleosensitivity of hydrogen isotope ratios of long‐chain alkenones to salinity changes at the Chile Margin Weiss, G.M. de Bar, M.W. Stolwijk, D.J. Schouten, S. Sinninghe Damsté, J.S. van der Meer, M.T.J. 2019 application/pdf https://www.vliz.be/imisdocs/publications/34/333934.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000474863700006 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1029/2019pa003591 https://www.vliz.be/imisdocs/publications/34/333934.pdf info:eu-repo/semantics/openAccess %3Ci%3EPaleoceanography+and+Paleoclimatology+34%286%29%3C%2Fi%3E%3A+978-989.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1029%2F2019pa003591%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1029%2F2019pa003591%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftnioz https://doi.org/10.1029/2019pa003591 2022-05-01T14:10:40Z Hydrogen isotope ratios of long‐chain alkenones (δ 2 H C37 ratios) have been shown to correlate with salinity in several culture studies. However, it is uncertain how applicable the δ 2 H C37 ‐salinity relationship is to reconstruct past salinity. The δ 2 H C37 ratios were measured on sediments from a drill core (ODP site 1234) at the Chilean Margin covering the last ~150 kyr. High δ 2 H C37 values corresponded to glacial time periods and interglacial periods are characterized by lower δ 2 H C37 values, aligning with δ 18 O ratios measured on planktonic foraminifera from the same core. Effects of parameters such as species composition, the δ 2 H‐δ 18 O relationship used for ice volume corrections, and nutrient‐ or light‐controlled growth rate, did not appear to significantly alter δ 2 H C37 ratios at ODP 1234. We used linear regression equations from batch culture experiments, marine surface sediments, and suspended particulate organic matter to quantitatively characterize salinity changes over the last ~150 kyr at ODP 1234. However, most of these equations yielded larger salinity shifts than previously suggested, a phenomenon also observed for other δ 2 H C37 records. This suggests that the paleosensitivity of δ 2 H C37 ratios to salinity was larger in the geologic record than has been observed in any modern environment or laboratory settings, or that glacial to interglacial salinity shifts might have been larger than currently believed. Article in Journal/Newspaper Planktonic foraminifera NIOZ Repository (Royal Netherlands Institute for Sea Research) Paleoceanography and Paleoclimatology 34 6 978 989 |
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Open Polar |
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NIOZ Repository (Royal Netherlands Institute for Sea Research) |
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ftnioz |
language |
English |
description |
Hydrogen isotope ratios of long‐chain alkenones (δ 2 H C37 ratios) have been shown to correlate with salinity in several culture studies. However, it is uncertain how applicable the δ 2 H C37 ‐salinity relationship is to reconstruct past salinity. The δ 2 H C37 ratios were measured on sediments from a drill core (ODP site 1234) at the Chilean Margin covering the last ~150 kyr. High δ 2 H C37 values corresponded to glacial time periods and interglacial periods are characterized by lower δ 2 H C37 values, aligning with δ 18 O ratios measured on planktonic foraminifera from the same core. Effects of parameters such as species composition, the δ 2 H‐δ 18 O relationship used for ice volume corrections, and nutrient‐ or light‐controlled growth rate, did not appear to significantly alter δ 2 H C37 ratios at ODP 1234. We used linear regression equations from batch culture experiments, marine surface sediments, and suspended particulate organic matter to quantitatively characterize salinity changes over the last ~150 kyr at ODP 1234. However, most of these equations yielded larger salinity shifts than previously suggested, a phenomenon also observed for other δ 2 H C37 records. This suggests that the paleosensitivity of δ 2 H C37 ratios to salinity was larger in the geologic record than has been observed in any modern environment or laboratory settings, or that glacial to interglacial salinity shifts might have been larger than currently believed. |
format |
Article in Journal/Newspaper |
author |
Weiss, G.M. de Bar, M.W. Stolwijk, D.J. Schouten, S. Sinninghe Damsté, J.S. van der Meer, M.T.J. |
spellingShingle |
Weiss, G.M. de Bar, M.W. Stolwijk, D.J. Schouten, S. Sinninghe Damsté, J.S. van der Meer, M.T.J. Paleosensitivity of hydrogen isotope ratios of long‐chain alkenones to salinity changes at the Chile Margin |
author_facet |
Weiss, G.M. de Bar, M.W. Stolwijk, D.J. Schouten, S. Sinninghe Damsté, J.S. van der Meer, M.T.J. |
author_sort |
Weiss, G.M. |
title |
Paleosensitivity of hydrogen isotope ratios of long‐chain alkenones to salinity changes at the Chile Margin |
title_short |
Paleosensitivity of hydrogen isotope ratios of long‐chain alkenones to salinity changes at the Chile Margin |
title_full |
Paleosensitivity of hydrogen isotope ratios of long‐chain alkenones to salinity changes at the Chile Margin |
title_fullStr |
Paleosensitivity of hydrogen isotope ratios of long‐chain alkenones to salinity changes at the Chile Margin |
title_full_unstemmed |
Paleosensitivity of hydrogen isotope ratios of long‐chain alkenones to salinity changes at the Chile Margin |
title_sort |
paleosensitivity of hydrogen isotope ratios of long‐chain alkenones to salinity changes at the chile margin |
publishDate |
2019 |
url |
https://www.vliz.be/imisdocs/publications/34/333934.pdf |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
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op_relation |
info:eu-repo/semantics/altIdentifier/wos/000474863700006 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1029/2019pa003591 https://www.vliz.be/imisdocs/publications/34/333934.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2019pa003591 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
34 |
container_issue |
6 |
container_start_page |
978 |
op_container_end_page |
989 |
_version_ |
1766170278237306880 |