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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Online Access: | http://nora.nerc.ac.uk/id/eprint/513424/ https://nora.nerc.ac.uk/id/eprint/513424/1/ncomms12655.pdf http://www.nature.com/articles/ncomms12655 |
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ftnerc:oai:nora.nerc.ac.uk:513424 2023-05-15T13:49:32+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 text http://nora.nerc.ac.uk/id/eprint/513424/ https://nora.nerc.ac.uk/id/eprint/513424/1/ncomms12655.pdf http://www.nature.com/articles/ncomms12655 en eng https://nora.nerc.ac.uk/id/eprint/513424/1/ncomms12655.pdf Belt, S.T.; Smik, L.; Brown, T.A.; Kim, J.-H.; Rowland, S.J.; Allen, C.S. orcid:0000-0002-0938-0551 Gal, J.-K.; Shin, K.-H.; Lee, J.I.; Taylor, K.W.R. 2016 Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25. Nature Communications, 7, 12655. https://doi.org/10.1038/ncomms12655 <https://doi.org/10.1038/ncomms12655> cc_by_4 CC-BY Publication - Article PeerReviewed 2016 ftnerc https://doi.org/10.1038/ncomms12655 2023-02-04T19:42:59Z 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. Article in Journal/Newspaper Antarc* Antarctic Ice Shelves Sea ice Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Southern Ocean Nature Communications 7 1 |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
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 |
Article in Journal/Newspaper |
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. |
spellingShingle |
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 |
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 |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/513424/ https://nora.nerc.ac.uk/id/eprint/513424/1/ncomms12655.pdf http://www.nature.com/articles/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 |
https://nora.nerc.ac.uk/id/eprint/513424/1/ncomms12655.pdf Belt, S.T.; Smik, L.; Brown, T.A.; Kim, J.-H.; Rowland, S.J.; Allen, C.S. orcid:0000-0002-0938-0551 Gal, J.-K.; Shin, K.-H.; Lee, J.I.; Taylor, K.W.R. 2016 Source identification and distribution reveals the potential of the geochemical Antarctic sea ice proxy IPSO25. Nature Communications, 7, 12655. https://doi.org/10.1038/ncomms12655 <https://doi.org/10.1038/ncomms12655> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/ncomms12655 |
container_title |
Nature Communications |
container_volume |
7 |
container_issue |
1 |
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1766251530135011328 |