Reconstructing spring sea ice concentration in the Chukchi Sea over recent centuries: insights into the application of the PIP25 index
<jats:title>Abstract</jats:title> <jats:p>In this study, we aimed to reconstruct spring (April–June) sea ice changes in the western Arctic Ocean over recent centuries (ca. the last 250 years) by measuring biomarker distributions in a multicore (ARA01B-03MUC) retrieved from the Chuk...
Published in: | Environmental Research Letters |
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IOP Publishing
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Online Access: | http://hdl.handle.net/10026.1/15303 https://doi.org/10.1088/1748-9326/ab4b6e |
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ftunivplympearl:oai:pearl.plymouth.ac.uk:10026.1/15303 2024-06-09T07:43:58+00:00 Reconstructing spring sea ice concentration in the Chukchi Sea over recent centuries: insights into the application of the PIP25 index Kim, J-H Gal, J-K Jun, S-Y Smik, L Kim, D Belt, ST Park, K Shin, K-H Nam, S-I 2019-11-27 125004-125004 application/pdf http://hdl.handle.net/10026.1/15303 https://doi.org/10.1088/1748-9326/ab4b6e en eng IOP Publishing ISSN:1748-9326 E-ISSN:1748-9326 1748-9326 125004 http://hdl.handle.net/10026.1/15303 doi:10.1088/1748-9326/ab4b6e 2020-1-16 Not known sea ice HBIs IP25 epi-brassicasterol dinosterol PIP25 index Chukchi Sea journal-article Article 2019 ftunivplympearl https://doi.org/10.1088/1748-9326/ab4b6e 2024-05-14T23:44:04Z <jats:title>Abstract</jats:title> <jats:p>In this study, we aimed to reconstruct spring (April–June) sea ice changes in the western Arctic Ocean over recent centuries (ca. the last 250 years) by measuring biomarker distributions in a multicore (ARA01B-03MUC) retrieved from the Chukchi Shelf region and to evaluate outcomes against known or modelled estimates of sea ice conditions. Specifically, we analyzed for the Arctic sea ice proxy IP<jats:sub>25</jats:sub> and assessed the suitability of a further highly branched isoprenoid (HBI) lipid (HBI III), epi-brassicasterol, and dinosterol as complementary biomarkers for use with the so-called phytoplankton marker-IP<jats:sub>25</jats:sub> index (PIP<jats:sub>25</jats:sub>; P<jats:sub>III</jats:sub>IP<jats:sub>25</jats:sub>, P<jats:sub>B</jats:sub>IP<jats:sub>25</jats:sub>, and P<jats:sub>D</jats:sub>IP<jats:sub>25</jats:sub>, respectively). The presence of IP<jats:sub>25</jats:sub> throughout core ARA01B-03MUC confirms the occurrence of seasonal sea ice at the study site over recent centuries. From a semi-quantitative perspective, all three PIP<jats:sub>25</jats:sub> indices gave different trends, with some dependence on the balance factor <jats:italic>c</jats:italic>, a term used in the calculation of the PIP<jats:sub>25</jats:sub> index. P<jats:sub>III</jats:sub>IP<jats:sub>25</jats:sub>-derived spring sea ice concentration (SpSIC) estimates using a <jats:italic>c</jats:italic> value of 0.63, determined previously from analysis of Barents Sea surface sediments, were likely most reliable, since SpSIC values were high throughout the record (SpSIC > 78%), consistent with the modern context for the Chukchi Sea and the mean SpSIC record of the 41 CMIP5 climate models over recent centuries. ... Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea Chukchi Chukchi Sea Phytoplankton Sea ice PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) Arctic Arctic Ocean Barents Sea Chukchi Sea Chukchi Shelf ENVELOPE(-169.167,-169.167,70.550,70.550) Environmental Research Letters 14 12 125004 |
institution |
Open Polar |
collection |
PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) |
op_collection_id |
ftunivplympearl |
language |
English |
topic |
sea ice HBIs IP25 epi-brassicasterol dinosterol PIP25 index Chukchi Sea |
spellingShingle |
sea ice HBIs IP25 epi-brassicasterol dinosterol PIP25 index Chukchi Sea Kim, J-H Gal, J-K Jun, S-Y Smik, L Kim, D Belt, ST Park, K Shin, K-H Nam, S-I Reconstructing spring sea ice concentration in the Chukchi Sea over recent centuries: insights into the application of the PIP25 index |
topic_facet |
sea ice HBIs IP25 epi-brassicasterol dinosterol PIP25 index Chukchi Sea |
description |
<jats:title>Abstract</jats:title> <jats:p>In this study, we aimed to reconstruct spring (April–June) sea ice changes in the western Arctic Ocean over recent centuries (ca. the last 250 years) by measuring biomarker distributions in a multicore (ARA01B-03MUC) retrieved from the Chukchi Shelf region and to evaluate outcomes against known or modelled estimates of sea ice conditions. Specifically, we analyzed for the Arctic sea ice proxy IP<jats:sub>25</jats:sub> and assessed the suitability of a further highly branched isoprenoid (HBI) lipid (HBI III), epi-brassicasterol, and dinosterol as complementary biomarkers for use with the so-called phytoplankton marker-IP<jats:sub>25</jats:sub> index (PIP<jats:sub>25</jats:sub>; P<jats:sub>III</jats:sub>IP<jats:sub>25</jats:sub>, P<jats:sub>B</jats:sub>IP<jats:sub>25</jats:sub>, and P<jats:sub>D</jats:sub>IP<jats:sub>25</jats:sub>, respectively). The presence of IP<jats:sub>25</jats:sub> throughout core ARA01B-03MUC confirms the occurrence of seasonal sea ice at the study site over recent centuries. From a semi-quantitative perspective, all three PIP<jats:sub>25</jats:sub> indices gave different trends, with some dependence on the balance factor <jats:italic>c</jats:italic>, a term used in the calculation of the PIP<jats:sub>25</jats:sub> index. P<jats:sub>III</jats:sub>IP<jats:sub>25</jats:sub>-derived spring sea ice concentration (SpSIC) estimates using a <jats:italic>c</jats:italic> value of 0.63, determined previously from analysis of Barents Sea surface sediments, were likely most reliable, since SpSIC values were high throughout the record (SpSIC > 78%), consistent with the modern context for the Chukchi Sea and the mean SpSIC record of the 41 CMIP5 climate models over recent centuries. ... |
format |
Article in Journal/Newspaper |
author |
Kim, J-H Gal, J-K Jun, S-Y Smik, L Kim, D Belt, ST Park, K Shin, K-H Nam, S-I |
author_facet |
Kim, J-H Gal, J-K Jun, S-Y Smik, L Kim, D Belt, ST Park, K Shin, K-H Nam, S-I |
author_sort |
Kim, J-H |
title |
Reconstructing spring sea ice concentration in the Chukchi Sea over recent centuries: insights into the application of the PIP25 index |
title_short |
Reconstructing spring sea ice concentration in the Chukchi Sea over recent centuries: insights into the application of the PIP25 index |
title_full |
Reconstructing spring sea ice concentration in the Chukchi Sea over recent centuries: insights into the application of the PIP25 index |
title_fullStr |
Reconstructing spring sea ice concentration in the Chukchi Sea over recent centuries: insights into the application of the PIP25 index |
title_full_unstemmed |
Reconstructing spring sea ice concentration in the Chukchi Sea over recent centuries: insights into the application of the PIP25 index |
title_sort |
reconstructing spring sea ice concentration in the chukchi sea over recent centuries: insights into the application of the pip25 index |
publisher |
IOP Publishing |
publishDate |
2019 |
url |
http://hdl.handle.net/10026.1/15303 https://doi.org/10.1088/1748-9326/ab4b6e |
long_lat |
ENVELOPE(-169.167,-169.167,70.550,70.550) |
geographic |
Arctic Arctic Ocean Barents Sea Chukchi Sea Chukchi Shelf |
geographic_facet |
Arctic Arctic Ocean Barents Sea Chukchi Sea Chukchi Shelf |
genre |
Arctic Arctic Ocean Barents Sea Chukchi Chukchi Sea Phytoplankton Sea ice |
genre_facet |
Arctic Arctic Ocean Barents Sea Chukchi Chukchi Sea Phytoplankton Sea ice |
op_relation |
ISSN:1748-9326 E-ISSN:1748-9326 1748-9326 125004 http://hdl.handle.net/10026.1/15303 doi:10.1088/1748-9326/ab4b6e |
op_rights |
2020-1-16 Not known |
op_doi |
https://doi.org/10.1088/1748-9326/ab4b6e |
container_title |
Environmental Research Letters |
container_volume |
14 |
container_issue |
12 |
container_start_page |
125004 |
_version_ |
1801372783203057664 |