Antarctic Ice Sheet re-advance during the Antarctic Cold Reversal identified in the Western Ross Sea
Marine geophysical data collected from the Ross Sea continental shelf during several oceanographic expeditions enabled evaluation of the Last Glacial Maximum (LGM) extent of the Antarctic Ice Sheet (AIS) through the presence of large Grounding Zone Wedges (GZWs), particularly evident in the outer re...
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ftuniveneziairis:oai:iris.unive.it:10278/5040780 2024-04-14T08:03:37+00:00 Antarctic Ice Sheet re-advance during the Antarctic Cold Reversal identified in the Western Ross Sea Carlo BARONI Martina TENTI Philip J. BART Maria Cristina SALVATORE Luca GASPERINI Martina BUSETTI Chiara SAULI Eusebio Maria STUCCHI & Andrea TOGNARELLI Baroni, Carlo Tenti, Martina Bart, Philip J. Cristina SALVATORE, Maria Gasperini, Luca Busetti, Martina Sauli, Chiara Maria STUCCHI & Eusebio Tognarelli, Andrea 2022 https://hdl.handle.net/10278/5040780 https://doi.org/10.4461/gfdq.2022.45.1 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:001027147300001 volume:45 issue:1 firstpage:3 lastpage:18 numberofpages:16 journal:GEOGRAFIA FISICA E DINAMICA QUATERNARIA https://hdl.handle.net/10278/5040780 doi:10.4461/gfdq.2022.45.1 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85161072687 https://doi.org/10.4461/gfdq.2022.45.1 info:eu-repo/semantics/openAccess Drygalski Basin Seafloor geomorphology Geophysical data Deglaciation Antarctic Cold Reversal AIS Re-advance Antarctica Settore GEO/11 - Geofisica Applicata Settore GEO/04 - Geografia Fisica e Geomorfologia info:eu-repo/semantics/article 2022 ftuniveneziairis https://doi.org/10.4461/gfdq.2022.45.1 2024-03-21T17:58:50Z Marine geophysical data collected from the Ross Sea continental shelf during several oceanographic expeditions enabled evaluation of the Last Glacial Maximum (LGM) extent of the Antarctic Ice Sheet (AIS) through the presence of large Grounding Zone Wedges (GZWs), particularly evident in the outer reaches of the Drygalski and Joides basins to the north of Coulman Island. Seismo-stratigraphic observations confirmed by geomorphological and stratigraphic data show a deep grounding line embayment dating back to the early deglacial transition, which preceded the last rapid sea-level and atmospheric CO2 rise. In this work, a new reconstruction based on the analysis of morpho-bathymetric and seismic reflection data from the middle reaches of the Drygalski Basin shows that the post-LGM retreat was followed by a short-lived re-advance of the grounding line during the Antarctic Cold Reversal (ACR). Evidences include GZWs that partly overprint megascale glacial lineations associated with the Coulman Island grounding line, followed by a Holocene retreat phase, which caused the final southward withdrawal of the grounded and floating ice. This late re-advance suggests a significant impact on the extent and thickness of the grounded ice from relatively small amplitude climate oscillations, able to exert a significant control on the AIS during the latest Pleistocene (i.e. the Last Glacial Termination). Given that the marine-based portion of the AIS in the Ross Sea was sensitive to millennial-scale climate oscillations, this evidence will contribute to clarify how the ice sheet may respond to ongoing and future climate change. Article in Journal/Newspaper Antarc* Antarctic Antarctica Coulman Island Ice Sheet Ross Sea Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Antarctic The Antarctic Ross Sea Drygalski ENVELOPE(-61.000,-61.000,-64.717,-64.717) Coulman Island ENVELOPE(169.750,169.750,-73.467,-73.467) Drygalski Basin ENVELOPE(166.500,166.500,-74.833,-74.833) |
institution |
Open Polar |
collection |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
English |
topic |
Drygalski Basin Seafloor geomorphology Geophysical data Deglaciation Antarctic Cold Reversal AIS Re-advance Antarctica Settore GEO/11 - Geofisica Applicata Settore GEO/04 - Geografia Fisica e Geomorfologia |
spellingShingle |
Drygalski Basin Seafloor geomorphology Geophysical data Deglaciation Antarctic Cold Reversal AIS Re-advance Antarctica Settore GEO/11 - Geofisica Applicata Settore GEO/04 - Geografia Fisica e Geomorfologia Carlo BARONI Martina TENTI Philip J. BART Maria Cristina SALVATORE Luca GASPERINI Martina BUSETTI Chiara SAULI Eusebio Maria STUCCHI & Andrea TOGNARELLI Antarctic Ice Sheet re-advance during the Antarctic Cold Reversal identified in the Western Ross Sea |
topic_facet |
Drygalski Basin Seafloor geomorphology Geophysical data Deglaciation Antarctic Cold Reversal AIS Re-advance Antarctica Settore GEO/11 - Geofisica Applicata Settore GEO/04 - Geografia Fisica e Geomorfologia |
description |
Marine geophysical data collected from the Ross Sea continental shelf during several oceanographic expeditions enabled evaluation of the Last Glacial Maximum (LGM) extent of the Antarctic Ice Sheet (AIS) through the presence of large Grounding Zone Wedges (GZWs), particularly evident in the outer reaches of the Drygalski and Joides basins to the north of Coulman Island. Seismo-stratigraphic observations confirmed by geomorphological and stratigraphic data show a deep grounding line embayment dating back to the early deglacial transition, which preceded the last rapid sea-level and atmospheric CO2 rise. In this work, a new reconstruction based on the analysis of morpho-bathymetric and seismic reflection data from the middle reaches of the Drygalski Basin shows that the post-LGM retreat was followed by a short-lived re-advance of the grounding line during the Antarctic Cold Reversal (ACR). Evidences include GZWs that partly overprint megascale glacial lineations associated with the Coulman Island grounding line, followed by a Holocene retreat phase, which caused the final southward withdrawal of the grounded and floating ice. This late re-advance suggests a significant impact on the extent and thickness of the grounded ice from relatively small amplitude climate oscillations, able to exert a significant control on the AIS during the latest Pleistocene (i.e. the Last Glacial Termination). Given that the marine-based portion of the AIS in the Ross Sea was sensitive to millennial-scale climate oscillations, this evidence will contribute to clarify how the ice sheet may respond to ongoing and future climate change. |
author2 |
Baroni, Carlo Tenti, Martina Bart, Philip J. Cristina SALVATORE, Maria Gasperini, Luca Busetti, Martina Sauli, Chiara Maria STUCCHI & Eusebio Tognarelli, Andrea |
format |
Article in Journal/Newspaper |
author |
Carlo BARONI Martina TENTI Philip J. BART Maria Cristina SALVATORE Luca GASPERINI Martina BUSETTI Chiara SAULI Eusebio Maria STUCCHI & Andrea TOGNARELLI |
author_facet |
Carlo BARONI Martina TENTI Philip J. BART Maria Cristina SALVATORE Luca GASPERINI Martina BUSETTI Chiara SAULI Eusebio Maria STUCCHI & Andrea TOGNARELLI |
author_sort |
Carlo BARONI |
title |
Antarctic Ice Sheet re-advance during the Antarctic Cold Reversal identified in the Western Ross Sea |
title_short |
Antarctic Ice Sheet re-advance during the Antarctic Cold Reversal identified in the Western Ross Sea |
title_full |
Antarctic Ice Sheet re-advance during the Antarctic Cold Reversal identified in the Western Ross Sea |
title_fullStr |
Antarctic Ice Sheet re-advance during the Antarctic Cold Reversal identified in the Western Ross Sea |
title_full_unstemmed |
Antarctic Ice Sheet re-advance during the Antarctic Cold Reversal identified in the Western Ross Sea |
title_sort |
antarctic ice sheet re-advance during the antarctic cold reversal identified in the western ross sea |
publishDate |
2022 |
url |
https://hdl.handle.net/10278/5040780 https://doi.org/10.4461/gfdq.2022.45.1 |
long_lat |
ENVELOPE(-61.000,-61.000,-64.717,-64.717) ENVELOPE(169.750,169.750,-73.467,-73.467) ENVELOPE(166.500,166.500,-74.833,-74.833) |
geographic |
Antarctic The Antarctic Ross Sea Drygalski Coulman Island Drygalski Basin |
geographic_facet |
Antarctic The Antarctic Ross Sea Drygalski Coulman Island Drygalski Basin |
genre |
Antarc* Antarctic Antarctica Coulman Island Ice Sheet Ross Sea |
genre_facet |
Antarc* Antarctic Antarctica Coulman Island Ice Sheet Ross Sea |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:001027147300001 volume:45 issue:1 firstpage:3 lastpage:18 numberofpages:16 journal:GEOGRAFIA FISICA E DINAMICA QUATERNARIA https://hdl.handle.net/10278/5040780 doi:10.4461/gfdq.2022.45.1 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85161072687 https://doi.org/10.4461/gfdq.2022.45.1 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.4461/gfdq.2022.45.1 |
_version_ |
1796299885158334464 |