Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25
The presence of a di-unsaturated highly branched isoprenoid (HBI) lipid biomarker (diene II) in Southern Ocean sediments has previously been proposed as a proxy measure of palaeo Antarctic sea ice. Here we show that a source of diene II is the sympagic diatom Berkeleya adeliensis Medlin. Furthermore...
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ftpubmed:oai:pubmedcentral.nih.gov:5013606 2023-05-15T13:30:39+02:00 Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25 Belt, S. T. Smik, L. Brown, T. A. Kim, J.-H. Rowland, S. J. Allen, C. S. Gal, J.-K. Shin, K.-H. Lee, J. I. Taylor, K. W. R. 2016-08-30 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5013606/ http://www.ncbi.nlm.nih.gov/pubmed/27573030 https://doi.org/10.1038/ncomms12655 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5013606/ http://www.ncbi.nlm.nih.gov/pubmed/27573030 http://dx.doi.org/10.1038/ncomms12655 Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2016 ftpubmed https://doi.org/10.1038/ncomms12655 2016-09-25T00:05:01Z The presence of a di-unsaturated highly branched isoprenoid (HBI) lipid biomarker (diene II) in Southern Ocean sediments has previously been proposed as a proxy measure of palaeo Antarctic sea ice. Here we show that a source of diene II is the sympagic diatom Berkeleya adeliensis Medlin. Furthermore, the propensity for B. adeliensis to flourish in platelet ice is reflected by an offshore downward gradient in diene II concentration in >100 surface sediments from Antarctic coastal and near-coastal environments. Since platelet ice formation is strongly associated with super-cooled freshwater inflow, we further hypothesize that sedimentary diene II provides a potentially sensitive proxy indicator of landfast sea ice influenced by meltwater discharge from nearby glaciers and ice shelves, and re-examination of some previous diene II downcore records supports this hypothesis. The term IPSO25—Ice Proxy for the Southern Ocean with 25 carbon atoms—is proposed as a proxy name for diene II. Text Antarc* Antarctic Ice Shelves Sea ice Southern Ocean PubMed Central (PMC) Antarctic Southern Ocean Nature Communications 7 1 |
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Article Belt, S. T. Smik, L. Brown, T. A. Kim, J.-H. Rowland, S. J. Allen, C. S. Gal, J.-K. Shin, K.-H. Lee, J. I. Taylor, K. W. R. Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25 |
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Article |
description |
The presence of a di-unsaturated highly branched isoprenoid (HBI) lipid biomarker (diene II) in Southern Ocean sediments has previously been proposed as a proxy measure of palaeo Antarctic sea ice. Here we show that a source of diene II is the sympagic diatom Berkeleya adeliensis Medlin. Furthermore, the propensity for B. adeliensis to flourish in platelet ice is reflected by an offshore downward gradient in diene II concentration in >100 surface sediments from Antarctic coastal and near-coastal environments. Since platelet ice formation is strongly associated with super-cooled freshwater inflow, we further hypothesize that sedimentary diene II provides a potentially sensitive proxy indicator of landfast sea ice influenced by meltwater discharge from nearby glaciers and ice shelves, and re-examination of some previous diene II downcore records supports this hypothesis. The term IPSO25—Ice Proxy for the Southern Ocean with 25 carbon atoms—is proposed as a proxy name for diene II. |
format |
Text |
author |
Belt, S. T. Smik, L. Brown, T. A. Kim, J.-H. Rowland, S. J. Allen, C. S. Gal, J.-K. Shin, K.-H. Lee, J. I. Taylor, K. W. R. |
author_facet |
Belt, S. T. Smik, L. Brown, T. A. Kim, J.-H. Rowland, S. J. Allen, C. S. Gal, J.-K. Shin, K.-H. Lee, J. I. Taylor, K. W. R. |
author_sort |
Belt, S. T. |
title |
Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25 |
title_short |
Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25 |
title_full |
Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25 |
title_fullStr |
Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25 |
title_full_unstemmed |
Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25 |
title_sort |
source identification and distribution reveals the potential of the geochemical antarctic sea ice proxy ipso25 |
publisher |
Nature Publishing Group |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5013606/ http://www.ncbi.nlm.nih.gov/pubmed/27573030 https://doi.org/10.1038/ncomms12655 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Ice Shelves Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Shelves Sea ice Southern Ocean |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5013606/ http://www.ncbi.nlm.nih.gov/pubmed/27573030 http://dx.doi.org/10.1038/ncomms12655 |
op_rights |
Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/ncomms12655 |
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Nature Communications |
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7 |
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1 |
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1766011122348982272 |