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...
Published in: | Geosciences |
---|---|
Main Authors: | , , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/11568/1120977 https://doi.org/10.3390/geosciences11040155 https://www.mdpi.com/2076-3263/11/4/155 |
id |
ftunivpisairis:oai:arpi.unipi.it:11568/1120977 |
---|---|
record_format |
openpolar |
spelling |
ftunivpisairis:oai:arpi.unipi.it:11568/1120977 2024-01-21T10:00:44+01:00 Environmental and Oceanographic Conditions at the Continental Margin of the Central Basin, Northwestern Ross Sea (Antarctica) since the Last Glacial Maximum Torricella F. Melis R. Maliverno E. Fontolan G. Bussi M. Capotondi L. del Carlo P. Di Roberto A. Geniram A. Kuhn G. Khim B. Morigi C. Scateni B. Colizza E. Torricella, F. Melis, R. Maliverno, E. Fontolan, G. Bussi, M. Capotondi, L. del Carlo, P. Di Roberto, A. Geniram, A. Kuhn, G. Khim, B. Morigi, C. Scateni, B. Colizza, E. 2021 STAMPA https://hdl.handle.net/11568/1120977 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 numberofpages:28 journal:GEOSCIENCES https://hdl.handle.net/11568/1120977 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 ftunivpisairis https://doi.org/10.3390/geosciences11040155 2023-12-27T17:51:13Z 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 ARPI - Archivio della Ricerca dell'Università di Pisa 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 |
ARPI - Archivio della Ricerca dell'Università di Pisa |
op_collection_id |
ftunivpisairis |
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 Torricella F. Melis R. Maliverno E. Fontolan G. Bussi M. Capotondi L. del Carlo P. Di Roberto A. Geniram A. Kuhn G. Khim B. Morigi C. Scateni B. Colizza E. 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, F. Melis, R. Maliverno, E. Fontolan, G. Bussi, M. Capotondi, L. del Carlo, P. Di Roberto, A. Geniram, A. Kuhn, G. Khim, B. Morigi, C. Scateni, B. Colizza, E. |
format |
Article in Journal/Newspaper |
author |
Torricella F. Melis R. Maliverno E. Fontolan G. Bussi M. Capotondi L. del Carlo P. Di Roberto A. Geniram A. Kuhn G. Khim B. Morigi C. Scateni B. Colizza E. |
author_facet |
Torricella F. Melis R. Maliverno E. Fontolan G. Bussi M. Capotondi L. del Carlo P. Di Roberto A. Geniram A. Kuhn G. Khim B. Morigi C. Scateni B. Colizza E. |
author_sort |
Torricella F. |
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 |
https://hdl.handle.net/11568/1120977 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 numberofpages:28 journal:GEOSCIENCES https://hdl.handle.net/11568/1120977 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 |
_version_ |
1788703494839992320 |