Centennial-scale variability of sea-ice cover in the Chukchi Sea since AD 1850 based on biomarker reconstruction
Paleo-climate proxy records documenting sea-ice extent are important sources of information to assess the time of emergence and magnitude of on-going changes in the Arctic Ocean and better predict future climate and environmental evolution in that region. In this study, a suite of geochemical tracer...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | Environmental Research Letters |
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| Online Access: | https://doi.org/10.1088/1748-9326/ac5f92 |
| _version_ | 1827869529921814528 |
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| author | Youcheng Bai Marie-Alexandrine Sicre Jian Ren Bassem Jalali Vincent Klein Hongliang Li Long Lin Zhongqiang Ji Liang Su Qingmei Zhu Haiyan Jin Jianfang Chen |
| author_facet | Youcheng Bai Marie-Alexandrine Sicre Jian Ren Bassem Jalali Vincent Klein Hongliang Li Long Lin Zhongqiang Ji Liang Su Qingmei Zhu Haiyan Jin Jianfang Chen |
| author_sort | Youcheng Bai |
| collection | DOAJ |
| description | Paleo-climate proxy records documenting sea-ice extent are important sources of information to assess the time of emergence and magnitude of on-going changes in the Arctic Ocean and better predict future climate and environmental evolution in that region. In this study, a suite of geochemical tracers including total organic carbon (TOC), total nitrogen (TN), carbon/nitrogen ratio (C/N), stable isotope composition of organic carbon and nitrogen ( δ ^13 C, δ ^15 N), and phytoplankton biomarkers (highly branched isoprenoids (HBIs) and sterols) were measured in a marine sediment core to document the sea-ice variability in the Chukchi Sea since the beginning of the Industrial Era. The downcore profile of the sea-ice proxy HBIs suggests a transition from extensive sea ice in the late 19th century to Marginal Ice Zone (MIZ) in AD 1930–1990s and then moderate sea-ice cover since 1990s. Rising of all HBI abundances between AD 1865–1875 indicate a transient retreat of summer ice edge off the shelf followed by a return to near-perennial sea ice till 1920–1930 as revealed by the absence of HBIs and brassicasterol. Sea ice retreat occurred again in AD 1920–1930 and followed by colder decades in 1940s–1960s before a sustained decline since the 1990s. The downcore profile of C/N, δ ^13 C of organic matter and sterols indicates a gradual increase of terrigenous inputs accelerating during the most recent decades likely due to enhanced fluvial run-off and sediment transport by sediment-laden sea ice. Concomitantly, increasing δ ^15 N values suggest limited nutrient utilization due to enhanced stratification of the surface ocean caused by increased freshening. The role of the Arctic oscillation (AO), the Pacific decadal oscillation (PDO) and Atlantic Multidecadal Oscillation (AMO) are discussed to explore potential drivers of the observed sea-ice changes. |
| first_indexed | 2024-03-12T15:45:32Z |
| format | Article |
| id | doaj.art-e8236eb658db4ae29eadb354eaa6e118 |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T15:45:32Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-e8236eb658db4ae29eadb354eaa6e1182023-08-09T15:28:00ZengIOP PublishingEnvironmental Research Letters1748-93262022-01-0117404405810.1088/1748-9326/ac5f92Centennial-scale variability of sea-ice cover in the Chukchi Sea since AD 1850 based on biomarker reconstructionYoucheng Bai0https://orcid.org/0000-0003-1116-7319Marie-Alexandrine Sicre1https://orcid.org/0000-0002-5015-1400Jian Ren2https://orcid.org/0000-0002-1889-5661Bassem Jalali3Vincent Klein4Hongliang Li5Long Lin6https://orcid.org/0000-0002-5355-9225Zhongqiang Ji7Liang Su8https://orcid.org/0000-0003-0648-677XQingmei Zhu9Haiyan Jin10https://orcid.org/0000-0002-4965-2830Jianfang Chen11https://orcid.org/0000-0002-6521-0266Key Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of China; Second Institute of Oceanography, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) , Zhuhai 519000, People’s Republic of ChinaSorbonne Université, Pierre et Marie Curie, CNRS, LOCEAN, Case 100 , 4 place Jussieu, Paris F-75005, FranceKey Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of China; Second Institute of Oceanography, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of ChinaKey Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of China; Second Institute of Oceanography, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of ChinaSorbonne Université, Pierre et Marie Curie, CNRS, LOCEAN, Case 100 , 4 place Jussieu, Paris F-75005, FranceKey Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of China; Second Institute of Oceanography, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of ChinaKey Laboratory of Polar Science, MNR, Polar Research Institute of China , Shanghai 200136, People’s Republic of ChinaKey Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of China; Second Institute of Oceanography, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of ChinaKey Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of China; Ocean College, Zhejiang University , Zhoushan 316021, People’s Republic of ChinaCollege of Ocean and Meteorology, Guangdong Ocean University , Zhanjiang 524088, People’s Republic of ChinaKey Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of China; Second Institute of Oceanography, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of China; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of ChinaKey Laboratory of Marine Ecosystem Dynamics, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of China; Second Institute of Oceanography, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of China; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources , Hangzhou 310012, People’s Republic of ChinaPaleo-climate proxy records documenting sea-ice extent are important sources of information to assess the time of emergence and magnitude of on-going changes in the Arctic Ocean and better predict future climate and environmental evolution in that region. In this study, a suite of geochemical tracers including total organic carbon (TOC), total nitrogen (TN), carbon/nitrogen ratio (C/N), stable isotope composition of organic carbon and nitrogen ( δ ^13 C, δ ^15 N), and phytoplankton biomarkers (highly branched isoprenoids (HBIs) and sterols) were measured in a marine sediment core to document the sea-ice variability in the Chukchi Sea since the beginning of the Industrial Era. The downcore profile of the sea-ice proxy HBIs suggests a transition from extensive sea ice in the late 19th century to Marginal Ice Zone (MIZ) in AD 1930–1990s and then moderate sea-ice cover since 1990s. Rising of all HBI abundances between AD 1865–1875 indicate a transient retreat of summer ice edge off the shelf followed by a return to near-perennial sea ice till 1920–1930 as revealed by the absence of HBIs and brassicasterol. Sea ice retreat occurred again in AD 1920–1930 and followed by colder decades in 1940s–1960s before a sustained decline since the 1990s. The downcore profile of C/N, δ ^13 C of organic matter and sterols indicates a gradual increase of terrigenous inputs accelerating during the most recent decades likely due to enhanced fluvial run-off and sediment transport by sediment-laden sea ice. Concomitantly, increasing δ ^15 N values suggest limited nutrient utilization due to enhanced stratification of the surface ocean caused by increased freshening. The role of the Arctic oscillation (AO), the Pacific decadal oscillation (PDO) and Atlantic Multidecadal Oscillation (AMO) are discussed to explore potential drivers of the observed sea-ice changes.https://doi.org/10.1088/1748-9326/ac5f92sea icebiomarkersIP25HBI IIIPIP25 indexChukchi sea |
| spellingShingle | Youcheng Bai Marie-Alexandrine Sicre Jian Ren Bassem Jalali Vincent Klein Hongliang Li Long Lin Zhongqiang Ji Liang Su Qingmei Zhu Haiyan Jin Jianfang Chen Centennial-scale variability of sea-ice cover in the Chukchi Sea since AD 1850 based on biomarker reconstruction Environmental Research Letters sea ice biomarkers IP25 HBI III PIP25 index Chukchi sea |
| title | Centennial-scale variability of sea-ice cover in the Chukchi Sea since AD 1850 based on biomarker reconstruction |
| title_full | Centennial-scale variability of sea-ice cover in the Chukchi Sea since AD 1850 based on biomarker reconstruction |
| title_fullStr | Centennial-scale variability of sea-ice cover in the Chukchi Sea since AD 1850 based on biomarker reconstruction |
| title_full_unstemmed | Centennial-scale variability of sea-ice cover in the Chukchi Sea since AD 1850 based on biomarker reconstruction |
| title_short | Centennial-scale variability of sea-ice cover in the Chukchi Sea since AD 1850 based on biomarker reconstruction |
| title_sort | centennial scale variability of sea ice cover in the chukchi sea since ad 1850 based on biomarker reconstruction |
| topic | sea ice biomarkers IP25 HBI III PIP25 index Chukchi sea |
| url | https://doi.org/10.1088/1748-9326/ac5f92 |
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