Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) Since the Last Glacial Maximum
The continental margin is a key area for studying the sedimentary processes related to the advance and retreat of the Ross Ice Shelf (Antarctica); nevertheless, much remains to be investigated. The aim of this study is to increase the knowledge of the last glacial/deglacial dynamics in the Central B...
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Online Access: | http://hdl.handle.net/2122/15061 https://doi.org/10.3390/geosciences11040155 |
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ftingv:oai:www.earth-prints.org:2122/15061 2023-05-15T14:01:37+02:00 Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) Since the Last Glacial Maximum Torricella, Fiorenza Melis, Romana Malinverno, Elisa Fontolan, Giorgio Bussi, Mauro Capotondi, Lucilla Del Carlo, Paola Di Roberto, Alessio Geniram, Andrea Kuhn, Gerhard Khim, Boo-Keun Morigi, Caterina Scateni, Bianca Colizza, Ester #PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia 2021 http://hdl.handle.net/2122/15061 https://doi.org/10.3390/geosciences11040155 en eng MDPI Geosciences /11 (2021) http://hdl.handle.net/2122/15061 doi:10.3390/geosciences11040155 open article 2021 ftingv https://doi.org/10.3390/geosciences11040155 2022-07-29T06:08:37Z The continental margin is a key area for studying the sedimentary processes related to the advance and retreat of the Ross Ice Shelf (Antarctica); nevertheless, much remains to be investigated. The aim of this study is to increase the knowledge of the last glacial/deglacial dynamics in the Central Basin slope–basin system using a multidisciplinary approach, including integrated sedimentological, micropaleontological and tephrochronological information. The analyses carried out on three box cores highlighted sedimentary sequences characterised by tree stratigraphic units. Collected sediments represent a time interval from 24 ka Before Present (BP) to the present time. Grain size clustering and data on the sortable silt component, together with diatom, silicoflagellate and foraminifera assemblages indicate the influence of the ice shelf calving zone (Unit 1, 24–17 ka BP), progressive receding due to Circumpolar Deep Water inflow (Unit 2, 17–10.2 ka BP) and (Unit 3, 10.2 ka BP–present) the establishment of seasonal sea ice with a strengthening of bottom currents. The dominant and persistent process is a sedimentation controlled by contour currents, which tend to modulate intensity in time and space. A primary volcanic ash layer dated back at around 22 ka BP is correlated with the explosive activity of Mount Rittmann. Published 155 5A. Ricerche polari e paleoclima JCR Journal Article in Journal/Newspaper Antarc* Antarctica Ice Shelf Ross Ice Shelf Ross Sea Sea ice Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Central Basin ENVELOPE(178.000,178.000,-72.300,-72.300) Mount Rittmann ENVELOPE(165.500,165.500,-73.450,-73.450) Rittmann ENVELOPE(165.500,165.500,-73.450,-73.450) Ross Ice Shelf Ross Sea Geosciences 11 4 155 |
institution |
Open Polar |
collection |
Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
op_collection_id |
ftingv |
language |
English |
description |
The continental margin is a key area for studying the sedimentary processes related to the advance and retreat of the Ross Ice Shelf (Antarctica); nevertheless, much remains to be investigated. The aim of this study is to increase the knowledge of the last glacial/deglacial dynamics in the Central Basin slope–basin system using a multidisciplinary approach, including integrated sedimentological, micropaleontological and tephrochronological information. The analyses carried out on three box cores highlighted sedimentary sequences characterised by tree stratigraphic units. Collected sediments represent a time interval from 24 ka Before Present (BP) to the present time. Grain size clustering and data on the sortable silt component, together with diatom, silicoflagellate and foraminifera assemblages indicate the influence of the ice shelf calving zone (Unit 1, 24–17 ka BP), progressive receding due to Circumpolar Deep Water inflow (Unit 2, 17–10.2 ka BP) and (Unit 3, 10.2 ka BP–present) the establishment of seasonal sea ice with a strengthening of bottom currents. The dominant and persistent process is a sedimentation controlled by contour currents, which tend to modulate intensity in time and space. A primary volcanic ash layer dated back at around 22 ka BP is correlated with the explosive activity of Mount Rittmann. Published 155 5A. Ricerche polari e paleoclima JCR Journal |
author2 |
#PLACEHOLDER_PARENT_METADATA_VALUE# Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Pisa, Pisa, Italia |
format |
Article in Journal/Newspaper |
author |
Torricella, Fiorenza Melis, Romana Malinverno, Elisa Fontolan, Giorgio Bussi, Mauro Capotondi, Lucilla Del Carlo, Paola Di Roberto, Alessio Geniram, Andrea Kuhn, Gerhard Khim, Boo-Keun Morigi, Caterina Scateni, Bianca Colizza, Ester |
spellingShingle |
Torricella, Fiorenza Melis, Romana Malinverno, Elisa Fontolan, Giorgio Bussi, Mauro Capotondi, Lucilla Del Carlo, Paola Di Roberto, Alessio Geniram, Andrea Kuhn, Gerhard Khim, Boo-Keun Morigi, Caterina Scateni, Bianca Colizza, Ester Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) Since the Last Glacial Maximum |
author_facet |
Torricella, Fiorenza Melis, Romana Malinverno, Elisa Fontolan, Giorgio Bussi, Mauro Capotondi, Lucilla Del Carlo, Paola Di Roberto, Alessio Geniram, Andrea Kuhn, Gerhard Khim, Boo-Keun Morigi, Caterina Scateni, Bianca Colizza, Ester |
author_sort |
Torricella, Fiorenza |
title |
Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) Since the Last Glacial Maximum |
title_short |
Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) Since the Last Glacial Maximum |
title_full |
Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) Since the Last Glacial Maximum |
title_fullStr |
Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) Since the Last Glacial Maximum |
title_full_unstemmed |
Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) Since the Last Glacial Maximum |
title_sort |
environmental and oceanographic conditions at the continental margin of the central basin, northwestern ross sea (antarctica) since the last glacial maximum |
publisher |
MDPI |
publishDate |
2021 |
url |
http://hdl.handle.net/2122/15061 https://doi.org/10.3390/geosciences11040155 |
long_lat |
ENVELOPE(178.000,178.000,-72.300,-72.300) ENVELOPE(165.500,165.500,-73.450,-73.450) ENVELOPE(165.500,165.500,-73.450,-73.450) |
geographic |
Central Basin Mount Rittmann Rittmann Ross Ice Shelf Ross Sea |
geographic_facet |
Central Basin Mount Rittmann Rittmann Ross Ice Shelf Ross Sea |
genre |
Antarc* Antarctica Ice Shelf Ross Ice Shelf Ross Sea Sea ice |
genre_facet |
Antarc* Antarctica Ice Shelf Ross Ice Shelf Ross Sea Sea ice |
op_relation |
Geosciences /11 (2021) http://hdl.handle.net/2122/15061 doi:10.3390/geosciences11040155 |
op_rights |
open |
op_doi |
https://doi.org/10.3390/geosciences11040155 |
container_title |
Geosciences |
container_volume |
11 |
container_issue |
4 |
container_start_page |
155 |
_version_ |
1766271581163618304 |