A potential suite of climate markers of long-chain n-alkanes and alkenones preserved in the top sediments from the Pacific sector of the Southern Ocean
Abstract Investigating organic compounds in marine sediments can potentially unlock a wealth of new information in these climate archives. Here, we present pilot study results of organic geochemical features of long-chain n -alkanes and alkenones and individual carbon isotope ratios of long-chain n...
Published in: | Progress in Earth and Planetary Science |
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2021
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Online Access: | http://dx.doi.org/10.1186/s40645-021-00416-9 http://link.springer.com/content/pdf/10.1186/s40645-021-00416-9.pdf http://link.springer.com/article/10.1186/s40645-021-00416-9/fulltext.html |
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crspringernat:10.1186/s40645-021-00416-9 2023-05-15T18:24:47+02:00 A potential suite of climate markers of long-chain n-alkanes and alkenones preserved in the top sediments from the Pacific sector of the Southern Ocean Chen, Xin Liu, Xiaodong Lin, Da-Cheng Wang, Jianjun Chen, Liqi Yu, Pai-Sen Wang, Linmiao Xiong, Zhifang Chen, Min-Te 2021 http://dx.doi.org/10.1186/s40645-021-00416-9 http://link.springer.com/content/pdf/10.1186/s40645-021-00416-9.pdf http://link.springer.com/article/10.1186/s40645-021-00416-9/fulltext.html en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Progress in Earth and Planetary Science volume 8, issue 1 ISSN 2197-4284 General Earth and Planetary Sciences journal-article 2021 crspringernat https://doi.org/10.1186/s40645-021-00416-9 2021-11-02T21:40:27Z Abstract Investigating organic compounds in marine sediments can potentially unlock a wealth of new information in these climate archives. Here, we present pilot study results of organic geochemical features of long-chain n -alkanes and alkenones and individual carbon isotope ratios of long-chain n -alkanes from a newly collected, approximately 8 m long, located in the far reaches of the Pacific sector of the Southern Ocean. We analyzed a suite of organic compounds in the core. The results show abundant long-chain n -alkanes (C 29 – C 35 ) with predominant odd-over-even carbon preference, suggesting an origin of terrestrial higher plant waxes via long-range transport of dust, possibly from Australia and New Zealand. The δ 13 C values of the C 31 n -alkane range from − 29.4 to − 24.8‰, in which the higher δ 13 C values suggest more contributions from C 4 plant waxes. In the analysis, we found that the mid-chain n -alkanes (C 23 – C 25 ) have a small odd-over-even carbon preference, indicating that they were derived from marine non-diatom pelagic phytoplankton and microalgae and terrestrial sources. Furthermore, the C 26 and C 28 with lower δ 13 C values (~ − 34‰) indicate an origin from marine chemoautotrophic bacteria. We found that the abundances of tetra-unsaturated alkenones (C 37:4 ) in this Southern Ocean sediment core ranges from 11 to 37%, perhaps a marker of low sea surface temperature (SST). The results of this study strongly indicate that the δ 13 C values of long-chain n -alkanes and $$ {U}_{37}^{\mathrm{k}} $$ U 37 k index are potentially useful to reconstruct the detailed history of C 3 /C 4 plants and SST change in the higher latitudes of the Southern Ocean. Article in Journal/Newspaper Southern Ocean Springer Nature (via Crossref) New Zealand Pacific Southern Ocean Progress in Earth and Planetary Science 8 1 |
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Open Polar |
collection |
Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Chen, Xin Liu, Xiaodong Lin, Da-Cheng Wang, Jianjun Chen, Liqi Yu, Pai-Sen Wang, Linmiao Xiong, Zhifang Chen, Min-Te A potential suite of climate markers of long-chain n-alkanes and alkenones preserved in the top sediments from the Pacific sector of the Southern Ocean |
topic_facet |
General Earth and Planetary Sciences |
description |
Abstract Investigating organic compounds in marine sediments can potentially unlock a wealth of new information in these climate archives. Here, we present pilot study results of organic geochemical features of long-chain n -alkanes and alkenones and individual carbon isotope ratios of long-chain n -alkanes from a newly collected, approximately 8 m long, located in the far reaches of the Pacific sector of the Southern Ocean. We analyzed a suite of organic compounds in the core. The results show abundant long-chain n -alkanes (C 29 – C 35 ) with predominant odd-over-even carbon preference, suggesting an origin of terrestrial higher plant waxes via long-range transport of dust, possibly from Australia and New Zealand. The δ 13 C values of the C 31 n -alkane range from − 29.4 to − 24.8‰, in which the higher δ 13 C values suggest more contributions from C 4 plant waxes. In the analysis, we found that the mid-chain n -alkanes (C 23 – C 25 ) have a small odd-over-even carbon preference, indicating that they were derived from marine non-diatom pelagic phytoplankton and microalgae and terrestrial sources. Furthermore, the C 26 and C 28 with lower δ 13 C values (~ − 34‰) indicate an origin from marine chemoautotrophic bacteria. We found that the abundances of tetra-unsaturated alkenones (C 37:4 ) in this Southern Ocean sediment core ranges from 11 to 37%, perhaps a marker of low sea surface temperature (SST). The results of this study strongly indicate that the δ 13 C values of long-chain n -alkanes and $$ {U}_{37}^{\mathrm{k}} $$ U 37 k index are potentially useful to reconstruct the detailed history of C 3 /C 4 plants and SST change in the higher latitudes of the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Chen, Xin Liu, Xiaodong Lin, Da-Cheng Wang, Jianjun Chen, Liqi Yu, Pai-Sen Wang, Linmiao Xiong, Zhifang Chen, Min-Te |
author_facet |
Chen, Xin Liu, Xiaodong Lin, Da-Cheng Wang, Jianjun Chen, Liqi Yu, Pai-Sen Wang, Linmiao Xiong, Zhifang Chen, Min-Te |
author_sort |
Chen, Xin |
title |
A potential suite of climate markers of long-chain n-alkanes and alkenones preserved in the top sediments from the Pacific sector of the Southern Ocean |
title_short |
A potential suite of climate markers of long-chain n-alkanes and alkenones preserved in the top sediments from the Pacific sector of the Southern Ocean |
title_full |
A potential suite of climate markers of long-chain n-alkanes and alkenones preserved in the top sediments from the Pacific sector of the Southern Ocean |
title_fullStr |
A potential suite of climate markers of long-chain n-alkanes and alkenones preserved in the top sediments from the Pacific sector of the Southern Ocean |
title_full_unstemmed |
A potential suite of climate markers of long-chain n-alkanes and alkenones preserved in the top sediments from the Pacific sector of the Southern Ocean |
title_sort |
potential suite of climate markers of long-chain n-alkanes and alkenones preserved in the top sediments from the pacific sector of the southern ocean |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1186/s40645-021-00416-9 http://link.springer.com/content/pdf/10.1186/s40645-021-00416-9.pdf http://link.springer.com/article/10.1186/s40645-021-00416-9/fulltext.html |
geographic |
New Zealand Pacific Southern Ocean |
geographic_facet |
New Zealand Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Progress in Earth and Planetary Science volume 8, issue 1 ISSN 2197-4284 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1186/s40645-021-00416-9 |
container_title |
Progress in Earth and Planetary Science |
container_volume |
8 |
container_issue |
1 |
_version_ |
1766205678572011520 |