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 |
---|---|
Main Authors: | , , , , , , , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus
2023
|
Subjects: | |
Online Access: | http://hdl.handle.net/2122/16994 https://doi.org/10.5194/jm-42-95-2023 |
id |
ftingv:oai:www.earth-prints.org:2122/16994 |
---|---|
record_format |
openpolar |
spelling |
ftingv:oai:www.earth-prints.org:2122/16994 2024-05-19T07:29:23+00:00 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 #PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia 2023-08-20 http://hdl.handle.net/2122/16994 https://doi.org/10.5194/jm-42-95-2023 en eng Copernicus Journal of Micropalaeontology /42 (2023) 2041-4978 http://hdl.handle.net/2122/16994 doi:10.5194/jm-42-95-2023 open article 2023 ftingv https://doi.org/10.5194/jm-42-95-2023 2024-04-23T23:33:04Z 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. Published 95–115 OSA2: Evoluzione climatica: effetti e loro mitigazione JCR Journal Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Sea ice Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Journal of Micropalaeontology 42 2 95 115 |
institution |
Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftingv |
language |
English |
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. Published 95–115 OSA2: Evoluzione climatica: effetti e loro mitigazione JCR Journal |
author2 |
#PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia |
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 |
spellingShingle |
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 |
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 |
publishDate |
2023 |
url |
http://hdl.handle.net/2122/16994 https://doi.org/10.5194/jm-42-95-2023 |
genre |
Antarc* Antarctic Antarctica Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Sea ice |
op_relation |
Journal of Micropalaeontology /42 (2023) 2041-4978 http://hdl.handle.net/2122/16994 doi:10.5194/jm-42-95-2023 |
op_rights |
open |
op_doi |
https://doi.org/10.5194/jm-42-95-2023 |
container_title |
Journal of Micropalaeontology |
container_volume |
42 |
container_issue |
2 |
container_start_page |
95 |
op_container_end_page |
115 |
_version_ |
1799478920604549120 |