Sedimentary records of bulk organic matter and lipid biomarkers in the Bering Sea: A centennial perspective of sea-ice variability and phytoplankton community
In this study, organic geochemical analyses of two sediment cores (BL16 and LV63–23) recovered from the western Bering Sea were carried out to examine the sea-ice variability and its relationship to phytoplankton community evolution over the past century. Bulk stable organic carbon isotopic composit...
Published in: | Marine Geology |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
ELSEVIER SCIENCE BV
2020
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/52877/ https://hdl.handle.net/10013/epic.d89caf9e-1d4f-498c-bbfd-ddb35a48e932 |
id |
ftawi:oai:epic.awi.de:52877 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:52877 2023-05-15T15:10:49+02:00 Sedimentary records of bulk organic matter and lipid biomarkers in the Bering Sea: A centennial perspective of sea-ice variability and phytoplankton community Hu, Limin Liu, Yanguang Xiao, Xiaotong Gong, Xun Zou, Jianjun Bai, Yazhi Gorbarenko, Sergey Fahl, Kirsten Stein, Rüdiger Shi, Xuefa 2020 https://epic.awi.de/id/eprint/52877/ https://hdl.handle.net/10013/epic.d89caf9e-1d4f-498c-bbfd-ddb35a48e932 unknown ELSEVIER SCIENCE BV Hu, L. , Liu, Y. , Xiao, X. , Gong, X. , Zou, J. , Bai, Y. , Gorbarenko, S. , Fahl, K. orcid:0000-0001-9317-4656 , Stein, R. orcid:0000-0002-4453-9564 and Shi, X. (2020) Sedimentary records of bulk organic matter and lipid biomarkers in the Bering Sea: A centennial perspective of sea-ice variability and phytoplankton community , Marine Geology, 429 (106308), pp. 1-11 . doi:10.1016/j.margeo.2020.106308 <https://doi.org/10.1016/j.margeo.2020.106308> , hdl:10013/epic.d89caf9e-1d4f-498c-bbfd-ddb35a48e932 EPIC3Marine Geology, ELSEVIER SCIENCE BV, 429(106308), pp. 1-11, ISSN: 0025-3227 Article isiRev 2020 ftawi https://doi.org/10.1016/j.margeo.2020.106308 2021-12-24T15:45:53Z In this study, organic geochemical analyses of two sediment cores (BL16 and LV63–23) recovered from the western Bering Sea were carried out to examine the sea-ice variability and its relationship to phytoplankton community evolution over the past century. Bulk stable organic carbon isotopic composition (δ13CTOC) showed pronounced depletion on the northern shelf since the late 1970s, indicating greater terrigenous organic matter (OM) under warming during recent decades. Variation in sedimentary OM in the southward core was closely associated with marine primary productivity and regional deposition processes. Arctic sea-ice proxy IP25 throughout the two cores with different temporal profile patterns demonstrated sea-ice presence with the spatiotemporal variability across the study area over the past century. The phytoplankton marker-IP25 index (PIP25), a proxy for estimating semi-quantitatively sea-ice concentrations, reflected a decreased sea-ice cover with more distinct interannual fluctuations between 0.7 and 0.2 (especially in core BL16) after the late 1970s, coinciding with the recent warming scenario. Increased concentrations of phytoplankton biomarkers (brassicasterol and dinosterol) and their ratios as well as the PIP25 record in core BL16 indicated a synchronous variability of reduced sea-ice cover with the enhancement of phytoplankton productivity since the late 1970s. These results suggested a coupled interaction of the sea-ice condition and planktonic ecosystem in the north Bering shelf. Our results also revealed recent (since the 2000s) spatial heterogeneity in sea-ice coverage between the northern and southern parts of the Bering Sea. Article in Journal/Newspaper Arctic Bering Sea Phytoplankton Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Bering Sea Bering Shelf ENVELOPE(-170.783,-170.783,60.128,60.128) Marine Geology 429 106308 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
In this study, organic geochemical analyses of two sediment cores (BL16 and LV63–23) recovered from the western Bering Sea were carried out to examine the sea-ice variability and its relationship to phytoplankton community evolution over the past century. Bulk stable organic carbon isotopic composition (δ13CTOC) showed pronounced depletion on the northern shelf since the late 1970s, indicating greater terrigenous organic matter (OM) under warming during recent decades. Variation in sedimentary OM in the southward core was closely associated with marine primary productivity and regional deposition processes. Arctic sea-ice proxy IP25 throughout the two cores with different temporal profile patterns demonstrated sea-ice presence with the spatiotemporal variability across the study area over the past century. The phytoplankton marker-IP25 index (PIP25), a proxy for estimating semi-quantitatively sea-ice concentrations, reflected a decreased sea-ice cover with more distinct interannual fluctuations between 0.7 and 0.2 (especially in core BL16) after the late 1970s, coinciding with the recent warming scenario. Increased concentrations of phytoplankton biomarkers (brassicasterol and dinosterol) and their ratios as well as the PIP25 record in core BL16 indicated a synchronous variability of reduced sea-ice cover with the enhancement of phytoplankton productivity since the late 1970s. These results suggested a coupled interaction of the sea-ice condition and planktonic ecosystem in the north Bering shelf. Our results also revealed recent (since the 2000s) spatial heterogeneity in sea-ice coverage between the northern and southern parts of the Bering Sea. |
format |
Article in Journal/Newspaper |
author |
Hu, Limin Liu, Yanguang Xiao, Xiaotong Gong, Xun Zou, Jianjun Bai, Yazhi Gorbarenko, Sergey Fahl, Kirsten Stein, Rüdiger Shi, Xuefa |
spellingShingle |
Hu, Limin Liu, Yanguang Xiao, Xiaotong Gong, Xun Zou, Jianjun Bai, Yazhi Gorbarenko, Sergey Fahl, Kirsten Stein, Rüdiger Shi, Xuefa Sedimentary records of bulk organic matter and lipid biomarkers in the Bering Sea: A centennial perspective of sea-ice variability and phytoplankton community |
author_facet |
Hu, Limin Liu, Yanguang Xiao, Xiaotong Gong, Xun Zou, Jianjun Bai, Yazhi Gorbarenko, Sergey Fahl, Kirsten Stein, Rüdiger Shi, Xuefa |
author_sort |
Hu, Limin |
title |
Sedimentary records of bulk organic matter and lipid biomarkers in the Bering Sea: A centennial perspective of sea-ice variability and phytoplankton community |
title_short |
Sedimentary records of bulk organic matter and lipid biomarkers in the Bering Sea: A centennial perspective of sea-ice variability and phytoplankton community |
title_full |
Sedimentary records of bulk organic matter and lipid biomarkers in the Bering Sea: A centennial perspective of sea-ice variability and phytoplankton community |
title_fullStr |
Sedimentary records of bulk organic matter and lipid biomarkers in the Bering Sea: A centennial perspective of sea-ice variability and phytoplankton community |
title_full_unstemmed |
Sedimentary records of bulk organic matter and lipid biomarkers in the Bering Sea: A centennial perspective of sea-ice variability and phytoplankton community |
title_sort |
sedimentary records of bulk organic matter and lipid biomarkers in the bering sea: a centennial perspective of sea-ice variability and phytoplankton community |
publisher |
ELSEVIER SCIENCE BV |
publishDate |
2020 |
url |
https://epic.awi.de/id/eprint/52877/ https://hdl.handle.net/10013/epic.d89caf9e-1d4f-498c-bbfd-ddb35a48e932 |
long_lat |
ENVELOPE(-170.783,-170.783,60.128,60.128) |
geographic |
Arctic Bering Sea Bering Shelf |
geographic_facet |
Arctic Bering Sea Bering Shelf |
genre |
Arctic Bering Sea Phytoplankton Sea ice |
genre_facet |
Arctic Bering Sea Phytoplankton Sea ice |
op_source |
EPIC3Marine Geology, ELSEVIER SCIENCE BV, 429(106308), pp. 1-11, ISSN: 0025-3227 |
op_relation |
Hu, L. , Liu, Y. , Xiao, X. , Gong, X. , Zou, J. , Bai, Y. , Gorbarenko, S. , Fahl, K. orcid:0000-0001-9317-4656 , Stein, R. orcid:0000-0002-4453-9564 and Shi, X. (2020) Sedimentary records of bulk organic matter and lipid biomarkers in the Bering Sea: A centennial perspective of sea-ice variability and phytoplankton community , Marine Geology, 429 (106308), pp. 1-11 . doi:10.1016/j.margeo.2020.106308 <https://doi.org/10.1016/j.margeo.2020.106308> , hdl:10013/epic.d89caf9e-1d4f-498c-bbfd-ddb35a48e932 |
op_doi |
https://doi.org/10.1016/j.margeo.2020.106308 |
container_title |
Marine Geology |
container_volume |
429 |
container_start_page |
106308 |
_version_ |
1766341764754440192 |