Paleoenvironmental changes related to the variations of the sea-ice cover during the Late Holocene in an Antarctic fjord (Edisto Inlet, Ross Sea) inferred by foraminiferal association
TR17-08, a marine sedimentary core (14.6 m), was collected during 2017 from the Edisto Inlet (Ross Sea, Antarctica), a small fjord near Cape Hallett. The core is characterized by expanded laminated sedimentary sequences making it suitable for studying submillennial processes during the Early Holocen...
Published in: | Journal of Micropalaeontology |
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2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00068843 2023-10-09T21:47:06+02:00 Paleoenvironmental changes related to the variations of the sea-ice cover during the Late Holocene in an Antarctic fjord (Edisto Inlet, Ross Sea) inferred by foraminiferal association Galli, Giacomo Morigi, Caterina Melis, Romana Di Roberto, Alessio Tesi, Tommaso Torricella, Fiorenza Langone, Leonardo Giordano, Patrizia Colizza, Ester Capotondi, Lucilla Gallerani, Andrea Gariboldi, Karen 2023-09 electronic https://doi.org/10.5194/jm-42-95-2023 https://noa.gwlb.de/receive/cop_mods_00068843 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067255/jm-42-95-2023.pdf https://jm.copernicus.org/articles/42/95/2023/jm-42-95-2023.pdf eng eng Copernicus Publications Journal of Micropalaeontology -- http://www.bibliothek.uni-regensburg.de/ezeit/?2053393 -- https://www.j-micropalaeontol.net/volumes.html -- http://jm.geoscienceworld.org/ -- 2041-4978 https://doi.org/10.5194/jm-42-95-2023 https://noa.gwlb.de/receive/cop_mods_00068843 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067255/jm-42-95-2023.pdf https://jm.copernicus.org/articles/42/95/2023/jm-42-95-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/jm-42-95-2023 2023-09-17T23:34:49Z TR17-08, a marine sedimentary core (14.6 m), was collected during 2017 from the Edisto Inlet (Ross Sea, Antarctica), a small fjord near Cape Hallett. The core is characterized by expanded laminated sedimentary sequences making it suitable for studying submillennial processes during the Early Holocene. By studying different well-known foraminifera species (Globocassidulina biora, G. subglobosa, Trifarina angulosa, Nonionella iridea, Epistominella exigua, Stainforthia feylingi, Miliammina arenacea, Paratrochammina bartrami and Portatrochammina antarctica), we were able to identify five different foraminiferal assemblages over the last ∼ 2000 years BP. Comparison with diatom assemblages and other geochemical proxies retrieved from nearby sediment cores in the Edisto Inlet (BAY05-20 and HLF17-1) made it possible to distinguish three different phases characterized by different environmental settings: (1) a seasonal phase (from 2012 to 1486 years BP) characterized by the dominance of calcareous species, indicating a seasonal opening of the inlet by more frequent events of melting of the sea-ice cover during the austral summer and, in general, a higher-productivity, more open and energetic environment; (2) a transitional phase (from 1486 to 696 years BP) during which the fjord experienced less extensive sea-ice melting, enhanced oxygen-poor conditions and carbonate dissolution conditions, indicated by the shifts from calcareous-dominated association to agglutinated-dominated association probably due to a freshwater input from the retreat of three local glaciers at the start of this period; and (3) a cooler phase (from 696 years BP to present) during which the sedimentation rate decreased and few to no foraminiferal specimens were present, indicating ephemeral openings or a more prolonged cover of the sea ice during the austral summer, affecting the nutrient supply and the sedimentation regime. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Sea ice Niedersächsisches Online-Archiv NOA Antarctic Austral Ross Sea Hallett ENVELOPE(170.217,170.217,-72.317,-72.317) Cape Hallett ENVELOPE(170.217,170.217,-72.317,-72.317) Edisto ENVELOPE(-67.133,-67.133,-68.217,-68.217) Edisto Inlet ENVELOPE(170.083,170.083,-72.333,-72.333) Journal of Micropalaeontology 42 2 95 115 |
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Niedersächsisches Online-Archiv NOA |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Galli, Giacomo Morigi, Caterina Melis, Romana Di Roberto, Alessio Tesi, Tommaso Torricella, Fiorenza Langone, Leonardo Giordano, Patrizia Colizza, Ester Capotondi, Lucilla Gallerani, Andrea Gariboldi, Karen Paleoenvironmental changes related to the variations of the sea-ice cover during the Late Holocene in an Antarctic fjord (Edisto Inlet, Ross Sea) inferred by foraminiferal association |
topic_facet |
article Verlagsveröffentlichung |
description |
TR17-08, a marine sedimentary core (14.6 m), was collected during 2017 from the Edisto Inlet (Ross Sea, Antarctica), a small fjord near Cape Hallett. The core is characterized by expanded laminated sedimentary sequences making it suitable for studying submillennial processes during the Early Holocene. By studying different well-known foraminifera species (Globocassidulina biora, G. subglobosa, Trifarina angulosa, Nonionella iridea, Epistominella exigua, Stainforthia feylingi, Miliammina arenacea, Paratrochammina bartrami and Portatrochammina antarctica), we were able to identify five different foraminiferal assemblages over the last ∼ 2000 years BP. Comparison with diatom assemblages and other geochemical proxies retrieved from nearby sediment cores in the Edisto Inlet (BAY05-20 and HLF17-1) made it possible to distinguish three different phases characterized by different environmental settings: (1) a seasonal phase (from 2012 to 1486 years BP) characterized by the dominance of calcareous species, indicating a seasonal opening of the inlet by more frequent events of melting of the sea-ice cover during the austral summer and, in general, a higher-productivity, more open and energetic environment; (2) a transitional phase (from 1486 to 696 years BP) during which the fjord experienced less extensive sea-ice melting, enhanced oxygen-poor conditions and carbonate dissolution conditions, indicated by the shifts from calcareous-dominated association to agglutinated-dominated association probably due to a freshwater input from the retreat of three local glaciers at the start of this period; and (3) a cooler phase (from 696 years BP to present) during which the sedimentation rate decreased and few to no foraminiferal specimens were present, indicating ephemeral openings or a more prolonged cover of the sea ice during the austral summer, affecting the nutrient supply and the sedimentation regime. |
format |
Article in Journal/Newspaper |
author |
Galli, Giacomo Morigi, Caterina Melis, Romana Di Roberto, Alessio Tesi, Tommaso Torricella, Fiorenza Langone, Leonardo Giordano, Patrizia Colizza, Ester Capotondi, Lucilla Gallerani, Andrea Gariboldi, Karen |
author_facet |
Galli, Giacomo Morigi, Caterina Melis, Romana Di Roberto, Alessio Tesi, Tommaso Torricella, Fiorenza Langone, Leonardo Giordano, Patrizia Colizza, Ester Capotondi, Lucilla Gallerani, Andrea Gariboldi, Karen |
author_sort |
Galli, Giacomo |
title |
Paleoenvironmental changes related to the variations of the sea-ice cover during the Late Holocene in an Antarctic fjord (Edisto Inlet, Ross Sea) inferred by foraminiferal association |
title_short |
Paleoenvironmental changes related to the variations of the sea-ice cover during the Late Holocene in an Antarctic fjord (Edisto Inlet, Ross Sea) inferred by foraminiferal association |
title_full |
Paleoenvironmental changes related to the variations of the sea-ice cover during the Late Holocene in an Antarctic fjord (Edisto Inlet, Ross Sea) inferred by foraminiferal association |
title_fullStr |
Paleoenvironmental changes related to the variations of the sea-ice cover during the Late Holocene in an Antarctic fjord (Edisto Inlet, Ross Sea) inferred by foraminiferal association |
title_full_unstemmed |
Paleoenvironmental changes related to the variations of the sea-ice cover during the Late Holocene in an Antarctic fjord (Edisto Inlet, Ross Sea) inferred by foraminiferal association |
title_sort |
paleoenvironmental changes related to the variations of the sea-ice cover during the late holocene in an antarctic fjord (edisto inlet, ross sea) inferred by foraminiferal association |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/jm-42-95-2023 https://noa.gwlb.de/receive/cop_mods_00068843 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067255/jm-42-95-2023.pdf https://jm.copernicus.org/articles/42/95/2023/jm-42-95-2023.pdf |
long_lat |
ENVELOPE(170.217,170.217,-72.317,-72.317) ENVELOPE(170.217,170.217,-72.317,-72.317) ENVELOPE(-67.133,-67.133,-68.217,-68.217) ENVELOPE(170.083,170.083,-72.333,-72.333) |
geographic |
Antarctic Austral Ross Sea Hallett Cape Hallett Edisto Edisto Inlet |
geographic_facet |
Antarctic Austral Ross Sea Hallett Cape Hallett Edisto Edisto Inlet |
genre |
Antarc* Antarctic Antarctica Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Sea ice |
op_relation |
Journal of Micropalaeontology -- http://www.bibliothek.uni-regensburg.de/ezeit/?2053393 -- https://www.j-micropalaeontol.net/volumes.html -- http://jm.geoscienceworld.org/ -- 2041-4978 https://doi.org/10.5194/jm-42-95-2023 https://noa.gwlb.de/receive/cop_mods_00068843 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067255/jm-42-95-2023.pdf https://jm.copernicus.org/articles/42/95/2023/jm-42-95-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/jm-42-95-2023 |
container_title |
Journal of Micropalaeontology |
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42 |
container_issue |
2 |
container_start_page |
95 |
op_container_end_page |
115 |
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1779309838458683392 |