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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2021
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Online Access: | http://hdl.handle.net/11368/2986046 https://doi.org/10.3390/geosciences11040155 https://www.mdpi.com/2076-3263/11/4/155 |
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ftunitriestiris:oai:arts.units.it:11368/2986046 2023-05-15T13:55:41+02:00 Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) Since the Last Glacial Maximum Fiorenza Torricella Romana Melis Elisa Malinverno Giorgio Fontolan Mauro Bussi Lucilla Capotondi Paola Del Carlo Alessio Di Roberto Andrea Geniram Gerhard Kuhn Boo-Keun Khim Caterina Morigi Bianca Scateni Ester Colizza 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 2021 http://hdl.handle.net/11368/2986046 https://doi.org/10.3390/geosciences11040155 https://www.mdpi.com/2076-3263/11/4/155 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000643084600001 volume:11 issue:4 firstpage:"-" lastpage:"-" numberofpages:28 journal:GEOSCIENCES http://hdl.handle.net/11368/2986046 doi:10.3390/geosciences11040155 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85104133875 https://www.mdpi.com/2076-3263/11/4/155 info:eu-repo/semantics/openAccess diatom micropaleontology sedimentology cryptotephra LGM to Holocene Central Basin Western Ross Sea Antarctica info:eu-repo/semantics/article 2021 ftunitriestiris https://doi.org/10.3390/geosciences11040155 2023-04-09T06:19:43Z 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. Article in Journal/Newspaper Antarc* Antarctica Ice Shelf Ross Ice Shelf Ross Sea Sea ice Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) 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 |
Università degli studi di Trieste: ArTS (Archivio della ricerca di Trieste) |
op_collection_id |
ftunitriestiris |
language |
English |
topic |
diatom micropaleontology sedimentology cryptotephra LGM to Holocene Central Basin Western Ross Sea Antarctica |
spellingShingle |
diatom micropaleontology sedimentology cryptotephra LGM to Holocene Central Basin Western Ross Sea Antarctica Fiorenza Torricella Romana Melis Elisa Malinverno Giorgio Fontolan Mauro Bussi Lucilla Capotondi Paola Del Carlo Alessio Di Roberto Andrea Geniram Gerhard Kuhn Boo-Keun Khim Caterina Morigi Bianca Scateni Ester Colizza Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) Since the Last Glacial Maximum |
topic_facet |
diatom micropaleontology sedimentology cryptotephra LGM to Holocene Central Basin Western Ross Sea Antarctica |
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. |
author2 |
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 |
format |
Article in Journal/Newspaper |
author |
Fiorenza Torricella Romana Melis Elisa Malinverno Giorgio Fontolan Mauro Bussi Lucilla Capotondi Paola Del Carlo Alessio Di Roberto Andrea Geniram Gerhard Kuhn Boo-Keun Khim Caterina Morigi Bianca Scateni Ester Colizza |
author_facet |
Fiorenza Torricella Romana Melis Elisa Malinverno Giorgio Fontolan Mauro Bussi Lucilla Capotondi Paola Del Carlo Alessio Di Roberto Andrea Geniram Gerhard Kuhn Boo-Keun Khim Caterina Morigi Bianca Scateni Ester Colizza |
author_sort |
Fiorenza Torricella |
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 |
publishDate |
2021 |
url |
http://hdl.handle.net/11368/2986046 https://doi.org/10.3390/geosciences11040155 https://www.mdpi.com/2076-3263/11/4/155 |
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 |
info:eu-repo/semantics/altIdentifier/wos/WOS:000643084600001 volume:11 issue:4 firstpage:"-" lastpage:"-" numberofpages:28 journal:GEOSCIENCES http://hdl.handle.net/11368/2986046 doi:10.3390/geosciences11040155 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85104133875 https://www.mdpi.com/2076-3263/11/4/155 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/geosciences11040155 |
container_title |
Geosciences |
container_volume |
11 |
container_issue |
4 |
container_start_page |
155 |
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1766262480516939776 |