Reconstruction of sea ice variability in the Chukchi Sea during the last three centuries based on biomarker proxies
Abstract In this study, we reconstruct three-century of sea ice cover history in the Chukchi Sea from the downcore profile of total organic carbon (TOC) and biomarker proxies, namely the Ice Proxy with 25 carbon atoms (IP 25 ), the di- and tri-unsaturated highly branched isoprenoid (HBI II and HBI I...
Published in: | Environmental Research Communications |
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2024
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Online Access: | http://dx.doi.org/10.1088/2515-7620/ad75f1 https://iopscience.iop.org/article/10.1088/2515-7620/ad75f1 https://iopscience.iop.org/article/10.1088/2515-7620/ad75f1/pdf |
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crioppubl:10.1088/2515-7620/ad75f1 2024-10-13T14:05:33+00:00 Reconstruction of sea ice variability in the Chukchi Sea during the last three centuries based on biomarker proxies Jalali, Bassem Sicre, Marie-Alexandrine Ren, Jian Klein, Vincent Li, Zhongqiao Su, Liang Bai, Youcheng Astakhov, Anatolii S Chen, Jianfang 2024 http://dx.doi.org/10.1088/2515-7620/ad75f1 https://iopscience.iop.org/article/10.1088/2515-7620/ad75f1 https://iopscience.iop.org/article/10.1088/2515-7620/ad75f1/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/4.0/ https://iopscience.iop.org/info/page/text-and-data-mining Environmental Research Communications volume 6, issue 9, page 091013 ISSN 2515-7620 journal-article 2024 crioppubl https://doi.org/10.1088/2515-7620/ad75f1 2024-09-30T04:12:23Z Abstract In this study, we reconstruct three-century of sea ice cover history in the Chukchi Sea from the downcore profile of total organic carbon (TOC) and biomarker proxies, namely the Ice Proxy with 25 carbon atoms (IP 25 ), the di- and tri-unsaturated highly branched isoprenoid (HBI II and HBI III) and two phytosterols (brassicasterol and dinosterol) in three sediment cores from the northern, eastern and southern Chukchi Sea reflecting different sea ice conditions. Our data indicate higher IP 25 values in the eastern site and lowest ones in the northern Chukchi Sea site that are consistent with the modern sea ice distribution. They also underline the predominance of sympagic over pelagic production except at the southern site where pelagic production depicts a sharp increased over the last decades. We present a new approach improving the linear relationship between P III IP 25 (P B IP 25 ) and satellite-derived spring (summer) sea ice concentrations (SIC) to advance sea ice reconstructions across the Arctic Ocean. This method results in better assessment of PIP 25 derived SIC and reconstruction of past seasonal sea ice conditions. They indicate marginal sea ice conditions at the three sites until 1950s–1960s followed by a reduction of seasonal sea ice as captured by P B IP 25 index. Article in Journal/Newspaper Arctic Arctic Ocean Chukchi Chukchi Sea Sea ice IOP Publishing Arctic Arctic Ocean Chukchi Sea Environmental Research Communications |
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Open Polar |
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IOP Publishing |
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crioppubl |
language |
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description |
Abstract In this study, we reconstruct three-century of sea ice cover history in the Chukchi Sea from the downcore profile of total organic carbon (TOC) and biomarker proxies, namely the Ice Proxy with 25 carbon atoms (IP 25 ), the di- and tri-unsaturated highly branched isoprenoid (HBI II and HBI III) and two phytosterols (brassicasterol and dinosterol) in three sediment cores from the northern, eastern and southern Chukchi Sea reflecting different sea ice conditions. Our data indicate higher IP 25 values in the eastern site and lowest ones in the northern Chukchi Sea site that are consistent with the modern sea ice distribution. They also underline the predominance of sympagic over pelagic production except at the southern site where pelagic production depicts a sharp increased over the last decades. We present a new approach improving the linear relationship between P III IP 25 (P B IP 25 ) and satellite-derived spring (summer) sea ice concentrations (SIC) to advance sea ice reconstructions across the Arctic Ocean. This method results in better assessment of PIP 25 derived SIC and reconstruction of past seasonal sea ice conditions. They indicate marginal sea ice conditions at the three sites until 1950s–1960s followed by a reduction of seasonal sea ice as captured by P B IP 25 index. |
format |
Article in Journal/Newspaper |
author |
Jalali, Bassem Sicre, Marie-Alexandrine Ren, Jian Klein, Vincent Li, Zhongqiao Su, Liang Bai, Youcheng Astakhov, Anatolii S Chen, Jianfang |
spellingShingle |
Jalali, Bassem Sicre, Marie-Alexandrine Ren, Jian Klein, Vincent Li, Zhongqiao Su, Liang Bai, Youcheng Astakhov, Anatolii S Chen, Jianfang Reconstruction of sea ice variability in the Chukchi Sea during the last three centuries based on biomarker proxies |
author_facet |
Jalali, Bassem Sicre, Marie-Alexandrine Ren, Jian Klein, Vincent Li, Zhongqiao Su, Liang Bai, Youcheng Astakhov, Anatolii S Chen, Jianfang |
author_sort |
Jalali, Bassem |
title |
Reconstruction of sea ice variability in the Chukchi Sea during the last three centuries based on biomarker proxies |
title_short |
Reconstruction of sea ice variability in the Chukchi Sea during the last three centuries based on biomarker proxies |
title_full |
Reconstruction of sea ice variability in the Chukchi Sea during the last three centuries based on biomarker proxies |
title_fullStr |
Reconstruction of sea ice variability in the Chukchi Sea during the last three centuries based on biomarker proxies |
title_full_unstemmed |
Reconstruction of sea ice variability in the Chukchi Sea during the last three centuries based on biomarker proxies |
title_sort |
reconstruction of sea ice variability in the chukchi sea during the last three centuries based on biomarker proxies |
publisher |
IOP Publishing |
publishDate |
2024 |
url |
http://dx.doi.org/10.1088/2515-7620/ad75f1 https://iopscience.iop.org/article/10.1088/2515-7620/ad75f1 https://iopscience.iop.org/article/10.1088/2515-7620/ad75f1/pdf |
geographic |
Arctic Arctic Ocean Chukchi Sea |
geographic_facet |
Arctic Arctic Ocean Chukchi Sea |
genre |
Arctic Arctic Ocean Chukchi Chukchi Sea Sea ice |
genre_facet |
Arctic Arctic Ocean Chukchi Chukchi Sea Sea ice |
op_source |
Environmental Research Communications volume 6, issue 9, page 091013 ISSN 2515-7620 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/2515-7620/ad75f1 |
container_title |
Environmental Research Communications |
_version_ |
1812811636974551040 |