Radiolarian assemblages related to the ocean–ice interaction around the East Antarctic coast
The Southern Ocean plays a central role in Earth's climate, ecology, and biogeochemical cycles. Therefore, understanding long-term changes in Southern Ocean water masses in the geologic past is essential for assessing the role of the Southern Ocean in the climate system. Radiolarian fossils are...
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ftdoajarticles:oai:doaj.org/article:24f9a0d702254fc7a970c6954ae10411 2024-02-27T08:33:18+00:00 Radiolarian assemblages related to the ocean–ice interaction around the East Antarctic coast M. Iizuka T. Itaki O. Seki R. Makabe M. Ojima S. Aoki 2024-01-01T00:00:00Z https://doi.org/10.5194/jm-43-37-2024 https://doaj.org/article/24f9a0d702254fc7a970c6954ae10411 EN eng Copernicus Publications https://jm.copernicus.org/articles/43/37/2024/jm-43-37-2024.pdf https://doaj.org/toc/0262-821X https://doaj.org/toc/2041-4978 doi:10.5194/jm-43-37-2024 0262-821X 2041-4978 https://doaj.org/article/24f9a0d702254fc7a970c6954ae10411 Journal of Micropalaeontology, Vol 43, Pp 37-53 (2024) Geology QE1-996.5 article 2024 ftdoajarticles https://doi.org/10.5194/jm-43-37-2024 2024-01-28T02:04:28Z The Southern Ocean plays a central role in Earth's climate, ecology, and biogeochemical cycles. Therefore, understanding long-term changes in Southern Ocean water masses in the geologic past is essential for assessing the role of the Southern Ocean in the climate system. Radiolarian fossils are a useful tool to reconstruct the water masses of the Southern Ocean. However, the radiolarian assemblages in the high latitudes of the Southern Ocean (south of the polar front (PF)) are still poorly understood. In this paper, we report the radiolarian assemblages in surface marine sediment and plankton tow samples collected from the high latitudes south of the PF. In the surface sediments, four factors (named F1–F4) of the radiolarian assemblages were identified using Q-mode factor analysis, which are related to different water masses and hydrological conditions. F1 is related to the surface waters south of the southern boundary (SB) of the Antarctic Circumpolar Current (ACC), which are cooled by melting sea ice and ice sheets. F2 is associated with water masses north of the SB. A comparison with the vertical distribution of the radiolarian assemblages in plankton tow samples indicates that characteristic species are associated with the Circumpolar Deep Water (CDW) and surface waters north of the SB. F3 is associated with modified Circumpolar Deep Water (mCDW). The radiolarian assemblage of F4 does not seem specifically related to any of the water mass here analyzed. However, the species in this assemblage are typically dwells within ice shelf and/or sea ice edge environments. Radiolarian assemblages here identified and associated with water masses, and ice edge environments are useful to reconstruct the environment south of the PF in the geologic past. Article in Journal/Newspaper Antarc* Antarctic Ice Shelf Sea ice Southern Ocean Directory of Open Access Journals: DOAJ Articles Antarctic Southern Ocean The Antarctic Journal of Micropalaeontology 43 1 37 53 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 M. Iizuka T. Itaki O. Seki R. Makabe M. Ojima S. Aoki Radiolarian assemblages related to the ocean–ice interaction around the East Antarctic coast |
topic_facet |
Geology QE1-996.5 |
description |
The Southern Ocean plays a central role in Earth's climate, ecology, and biogeochemical cycles. Therefore, understanding long-term changes in Southern Ocean water masses in the geologic past is essential for assessing the role of the Southern Ocean in the climate system. Radiolarian fossils are a useful tool to reconstruct the water masses of the Southern Ocean. However, the radiolarian assemblages in the high latitudes of the Southern Ocean (south of the polar front (PF)) are still poorly understood. In this paper, we report the radiolarian assemblages in surface marine sediment and plankton tow samples collected from the high latitudes south of the PF. In the surface sediments, four factors (named F1–F4) of the radiolarian assemblages were identified using Q-mode factor analysis, which are related to different water masses and hydrological conditions. F1 is related to the surface waters south of the southern boundary (SB) of the Antarctic Circumpolar Current (ACC), which are cooled by melting sea ice and ice sheets. F2 is associated with water masses north of the SB. A comparison with the vertical distribution of the radiolarian assemblages in plankton tow samples indicates that characteristic species are associated with the Circumpolar Deep Water (CDW) and surface waters north of the SB. F3 is associated with modified Circumpolar Deep Water (mCDW). The radiolarian assemblage of F4 does not seem specifically related to any of the water mass here analyzed. However, the species in this assemblage are typically dwells within ice shelf and/or sea ice edge environments. Radiolarian assemblages here identified and associated with water masses, and ice edge environments are useful to reconstruct the environment south of the PF in the geologic past. |
format |
Article in Journal/Newspaper |
author |
M. Iizuka T. Itaki O. Seki R. Makabe M. Ojima S. Aoki |
author_facet |
M. Iizuka T. Itaki O. Seki R. Makabe M. Ojima S. Aoki |
author_sort |
M. Iizuka |
title |
Radiolarian assemblages related to the ocean–ice interaction around the East Antarctic coast |
title_short |
Radiolarian assemblages related to the ocean–ice interaction around the East Antarctic coast |
title_full |
Radiolarian assemblages related to the ocean–ice interaction around the East Antarctic coast |
title_fullStr |
Radiolarian assemblages related to the ocean–ice interaction around the East Antarctic coast |
title_full_unstemmed |
Radiolarian assemblages related to the ocean–ice interaction around the East Antarctic coast |
title_sort |
radiolarian assemblages related to the ocean–ice interaction around the east antarctic coast |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/jm-43-37-2024 https://doaj.org/article/24f9a0d702254fc7a970c6954ae10411 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Ice Shelf Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Shelf Sea ice Southern Ocean |
op_source |
Journal of Micropalaeontology, Vol 43, Pp 37-53 (2024) |
op_relation |
https://jm.copernicus.org/articles/43/37/2024/jm-43-37-2024.pdf https://doaj.org/toc/0262-821X https://doaj.org/toc/2041-4978 doi:10.5194/jm-43-37-2024 0262-821X 2041-4978 https://doaj.org/article/24f9a0d702254fc7a970c6954ae10411 |
op_doi |
https://doi.org/10.5194/jm-43-37-2024 |
container_title |
Journal of Micropalaeontology |
container_volume |
43 |
container_issue |
1 |
container_start_page |
37 |
op_container_end_page |
53 |
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1792044970867163136 |