Reconstructing spring sea ice concentration in the Chukchi Sea over recent centuries: insights into the application of the PIP25 index
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 m...
Published in: | Environmental Research Letters |
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Online Access: | https://doi.org/10.1088/1748-9326/ab4b6e https://doaj.org/article/8a9ded64a4a7477da40b94dff6d82b23 |
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ftdoajarticles:oai:doaj.org/article:8a9ded64a4a7477da40b94dff6d82b23 2023-09-05T13:17:04+02:00 Reconstructing spring sea ice concentration in the Chukchi Sea over recent centuries: insights into the application of the PIP25 index Jung-Hyun Kim Jong-Ku Gal Sang-Yoon Jun Lukas Smik Dahae Kim Simon T Belt Kwangkyu Park Kyung-Hoon Shin Seung-Il Nam 2019-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/ab4b6e https://doaj.org/article/8a9ded64a4a7477da40b94dff6d82b23 EN eng IOP Publishing https://doi.org/10.1088/1748-9326/ab4b6e https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/ab4b6e 1748-9326 https://doaj.org/article/8a9ded64a4a7477da40b94dff6d82b23 Environmental Research Letters, Vol 14, Iss 12, p 125004 (2019) sea ice HBIs IP25 epi-brassicasterol dinosterol PIP25 index Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2019 ftdoajarticles https://doi.org/10.1088/1748-9326/ab4b6e 2023-08-13T00:37:25Z 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 _25 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 _25 index (PIP _25 P _III IP _25 , P _B IP _25 , and P _D IP _25 , respectively). The presence of IP _25 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 _25 indices gave different trends, with some dependence on the balance factor c , a term used in the calculation of the PIP _25 index. P _III IP _25 -derived spring sea ice concentration (SpSIC) estimates using a c 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. P _B IP _25 -based SpSIC estimates were also high (SpSIC 108%−127%), albeit somewhat over-estimated, when using a c value of 0.023 obtained from a pan-Arctic distribution of surface sediments. In contrast, P _D IP _25 values using a pan-Arctic c value of 0.11, and PIP _25 data based on the mean biomarker concentrations from ARA01B-03MUC, largely underestimated sea ice conditions (SpSIC as low as 13%), and exhibited poor agreement with instrumental records or model outputs. On the other hand, P _B IP _25 values using a c factor based on mean IP _25 and epi-brassicasterol concentrations exhibited a decline towards the core top, ... Article in Journal/Newspaper Arctic Arctic Ocean Barents Sea Chukchi Chukchi Sea Phytoplankton Sea ice Directory of Open Access Journals: DOAJ Articles 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 |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
sea ice HBIs IP25 epi-brassicasterol dinosterol PIP25 index Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
sea ice HBIs IP25 epi-brassicasterol dinosterol PIP25 index Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Jung-Hyun Kim Jong-Ku Gal Sang-Yoon Jun Lukas Smik Dahae Kim Simon T Belt Kwangkyu Park Kyung-Hoon Shin Seung-Il Nam 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 Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
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 _25 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 _25 index (PIP _25 P _III IP _25 , P _B IP _25 , and P _D IP _25 , respectively). The presence of IP _25 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 _25 indices gave different trends, with some dependence on the balance factor c , a term used in the calculation of the PIP _25 index. P _III IP _25 -derived spring sea ice concentration (SpSIC) estimates using a c 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. P _B IP _25 -based SpSIC estimates were also high (SpSIC 108%−127%), albeit somewhat over-estimated, when using a c value of 0.023 obtained from a pan-Arctic distribution of surface sediments. In contrast, P _D IP _25 values using a pan-Arctic c value of 0.11, and PIP _25 data based on the mean biomarker concentrations from ARA01B-03MUC, largely underestimated sea ice conditions (SpSIC as low as 13%), and exhibited poor agreement with instrumental records or model outputs. On the other hand, P _B IP _25 values using a c factor based on mean IP _25 and epi-brassicasterol concentrations exhibited a decline towards the core top, ... |
format |
Article in Journal/Newspaper |
author |
Jung-Hyun Kim Jong-Ku Gal Sang-Yoon Jun Lukas Smik Dahae Kim Simon T Belt Kwangkyu Park Kyung-Hoon Shin Seung-Il Nam |
author_facet |
Jung-Hyun Kim Jong-Ku Gal Sang-Yoon Jun Lukas Smik Dahae Kim Simon T Belt Kwangkyu Park Kyung-Hoon Shin Seung-Il Nam |
author_sort |
Jung-Hyun Kim |
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 |
https://doi.org/10.1088/1748-9326/ab4b6e https://doaj.org/article/8a9ded64a4a7477da40b94dff6d82b23 |
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_source |
Environmental Research Letters, Vol 14, Iss 12, p 125004 (2019) |
op_relation |
https://doi.org/10.1088/1748-9326/ab4b6e https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/ab4b6e 1748-9326 https://doaj.org/article/8a9ded64a4a7477da40b94dff6d82b23 |
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_ |
1776198396089991168 |