Change in Sediment Provenance on the Inner Slope of the Chukchi Rise and Their Paleoenvironmental Implications
The Arctic Ocean is one of the world’s most remarkable regions with respect to global climate change. The core ARA09C-St03 was analyzed for mineral composition and Nd isotope to determine the sediment provenance and reconstruct the paleoenvironment in the inner slope of the Chukchi Rise. Core ARA09C...
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ftmdpi:oai:mdpi.com:/2076-3417/11/14/6491/ 2023-08-20T04:04:11+02:00 Change in Sediment Provenance on the Inner Slope of the Chukchi Rise and Their Paleoenvironmental Implications Hyo-Jin Koo Young-Keun Jin Hyen-Goo Cho agris 2021-07-14 application/pdf https://doi.org/10.3390/app11146491 EN eng Multidisciplinary Digital Publishing Institute Chemical and Molecular Sciences https://dx.doi.org/10.3390/app11146491 https://creativecommons.org/licenses/by/4.0/ Applied Sciences; Volume 11; Issue 14; Pages: 6491 Chukchi Sea mineralogy Nd isotope sediment provenance paleoenvironment Text 2021 ftmdpi https://doi.org/10.3390/app11146491 2023-08-01T02:11:16Z The Arctic Ocean is one of the world’s most remarkable regions with respect to global climate change. The core ARA09C-St03 was analyzed for mineral composition and Nd isotope to determine the sediment provenance and reconstruct the paleoenvironment in the inner slope of the Chukchi Rise. Core ARA09C-St03 represents overall cycles of brown and gray color with three distinct dark brown layers and two pinkish-white layers and is divided into eight sedimentary units based on the lithological feature. The core has a continuous record of the late marine isotope stage (MIS) 5 to the Holocene and in particular provides a particularly high-resolution record from the Last Glacial Maximum (LGM). Sediment is derived mainly from the adjacent East Siberian Sea and the North American region, and changes in sediment provenance are controlled by climate-dependent particle size. During the glacial/stadial periods, sediments in Units 3, 5, and 8 were supplied by the East Siberian Sea via meltwater-derived suspension. The major ice-rafted debris (IRD) events in Units 2, 4, and 7, characterized by abundant dolomite and K/C ratio, were sourced from North America. The North America-derived materials reflect the initiation and disintegration of the Laurentide Ice Sheet and icebergs transported them across the open Arctic Ocean. The differences in provenance within these periods may be related to the scale of the Laurentide Ice Sheet. Interglacial sediments, including those from Units 1 and 6, are of mixed origin from Eurasia and the Canadian Archipelago and may have been transported by oceanic current and seasonal sea ice. These periods are likely associated with the negative Arctic Oscillation (AO) intensifying the Beaufort Gyre. Text Arctic Arctic Ocean Canadian Archipelago Chukchi Chukchi Sea Climate change East Siberian Sea Ice Sheet Iceberg* Sea ice MDPI Open Access Publishing Arctic Arctic Ocean Chukchi Rise ENVELOPE(-165.000,-165.000,78.000,78.000) Chukchi Sea East Siberian Sea ENVELOPE(166.000,166.000,74.000,74.000) Applied Sciences 11 14 6491 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
Chukchi Sea mineralogy Nd isotope sediment provenance paleoenvironment |
spellingShingle |
Chukchi Sea mineralogy Nd isotope sediment provenance paleoenvironment Hyo-Jin Koo Young-Keun Jin Hyen-Goo Cho Change in Sediment Provenance on the Inner Slope of the Chukchi Rise and Their Paleoenvironmental Implications |
topic_facet |
Chukchi Sea mineralogy Nd isotope sediment provenance paleoenvironment |
description |
The Arctic Ocean is one of the world’s most remarkable regions with respect to global climate change. The core ARA09C-St03 was analyzed for mineral composition and Nd isotope to determine the sediment provenance and reconstruct the paleoenvironment in the inner slope of the Chukchi Rise. Core ARA09C-St03 represents overall cycles of brown and gray color with three distinct dark brown layers and two pinkish-white layers and is divided into eight sedimentary units based on the lithological feature. The core has a continuous record of the late marine isotope stage (MIS) 5 to the Holocene and in particular provides a particularly high-resolution record from the Last Glacial Maximum (LGM). Sediment is derived mainly from the adjacent East Siberian Sea and the North American region, and changes in sediment provenance are controlled by climate-dependent particle size. During the glacial/stadial periods, sediments in Units 3, 5, and 8 were supplied by the East Siberian Sea via meltwater-derived suspension. The major ice-rafted debris (IRD) events in Units 2, 4, and 7, characterized by abundant dolomite and K/C ratio, were sourced from North America. The North America-derived materials reflect the initiation and disintegration of the Laurentide Ice Sheet and icebergs transported them across the open Arctic Ocean. The differences in provenance within these periods may be related to the scale of the Laurentide Ice Sheet. Interglacial sediments, including those from Units 1 and 6, are of mixed origin from Eurasia and the Canadian Archipelago and may have been transported by oceanic current and seasonal sea ice. These periods are likely associated with the negative Arctic Oscillation (AO) intensifying the Beaufort Gyre. |
format |
Text |
author |
Hyo-Jin Koo Young-Keun Jin Hyen-Goo Cho |
author_facet |
Hyo-Jin Koo Young-Keun Jin Hyen-Goo Cho |
author_sort |
Hyo-Jin Koo |
title |
Change in Sediment Provenance on the Inner Slope of the Chukchi Rise and Their Paleoenvironmental Implications |
title_short |
Change in Sediment Provenance on the Inner Slope of the Chukchi Rise and Their Paleoenvironmental Implications |
title_full |
Change in Sediment Provenance on the Inner Slope of the Chukchi Rise and Their Paleoenvironmental Implications |
title_fullStr |
Change in Sediment Provenance on the Inner Slope of the Chukchi Rise and Their Paleoenvironmental Implications |
title_full_unstemmed |
Change in Sediment Provenance on the Inner Slope of the Chukchi Rise and Their Paleoenvironmental Implications |
title_sort |
change in sediment provenance on the inner slope of the chukchi rise and their paleoenvironmental implications |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/app11146491 |
op_coverage |
agris |
long_lat |
ENVELOPE(-165.000,-165.000,78.000,78.000) ENVELOPE(166.000,166.000,74.000,74.000) |
geographic |
Arctic Arctic Ocean Chukchi Rise Chukchi Sea East Siberian Sea |
geographic_facet |
Arctic Arctic Ocean Chukchi Rise Chukchi Sea East Siberian Sea |
genre |
Arctic Arctic Ocean Canadian Archipelago Chukchi Chukchi Sea Climate change East Siberian Sea Ice Sheet Iceberg* Sea ice |
genre_facet |
Arctic Arctic Ocean Canadian Archipelago Chukchi Chukchi Sea Climate change East Siberian Sea Ice Sheet Iceberg* Sea ice |
op_source |
Applied Sciences; Volume 11; Issue 14; Pages: 6491 |
op_relation |
Chemical and Molecular Sciences https://dx.doi.org/10.3390/app11146491 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/app11146491 |
container_title |
Applied Sciences |
container_volume |
11 |
container_issue |
14 |
container_start_page |
6491 |
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1774714591573442560 |