Ice Retreat History in Pine Island Bay, Revealed by Sedimentary Be-10 Records
Reconstruction of the past dynamics of the Antarctic ice sheets by studying records from their margin is essential to evaluate their stability and their contribution to future sea level rise. Recently, the first direct evidence for a paleo-subglacial lake on the Antarctic continental shelf was repor...
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ftawi:oai:epic.awi.de:51991 2024-09-15T17:42:12+00:00 Ice Retreat History in Pine Island Bay, Revealed by Sedimentary Be-10 Records Suganuma, Yusuke Kuhn, Gerhard Hillenbrand, Claus-Dieter Zondervan, Albert 2018 application/pdf https://epic.awi.de/id/eprint/51991/ https://epic.awi.de/id/eprint/51991/1/Suganuma_etal_polar2018_abstr.pdf http://www.professionalabstracts.com/POLAR2018/iPlanner https://hdl.handle.net/10013/epic.fc0e6997-70e0-4a0c-9ca7-a7ee1bbac25b unknown SCAR https://epic.awi.de/id/eprint/51991/1/Suganuma_etal_polar2018_abstr.pdf Suganuma, Y. , Kuhn, G. orcid:0000-0001-6069-7485 , Hillenbrand, C. D. and Zondervan, A. (2018) Ice Retreat History in Pine Island Bay, Revealed by Sedimentary Be-10 Records , POLAR2018 SCAR/IASC Open Science Conference, Davos, 19 June 2018 - 23 June 2018 . hdl:10013/epic.fc0e6997-70e0-4a0c-9ca7-a7ee1bbac25b EPIC3POLAR2018 SCAR/IASC Open Science Conference, Davos, 2018-06-19-2018-06-23Davos, SCAR Conference notRev 2018 ftawi 2024-06-24T04:24:41Z Reconstruction of the past dynamics of the Antarctic ice sheets by studying records from their margin is essential to evaluate their stability and their contribution to future sea level rise. Recently, the first direct evidence for a paleo-subglacial lake on the Antarctic continental shelf was reported from a sediment core from a small bedrock basin in Pine Island Bay (PIB), West Antarctica. Here we report further evidence for this paleosubglacial lake based on down-core changes in Be-10 concentrations in the sediments. Very low Be-10 concentration in the lower part of the core indicate limited input of meteoric Be-10, suggesting deposition of the corresponding sediments in isolation from the open ocean. The Be-10 concentration shows a drop within a sand, silt and mud interval in the middle part of the core that was interpreted to result from deposition during the transition from the subglacial lake to a sub-ice shelf cavern caused by grounding line retreat in PIB around 11 kyrs B.P. The Be-10 concentration increases significantly toward the top of the core, indicating the establishment of an open marine setting later during the Holocene. In addition, we report new Be-10 data from marine sediment cores in other parts of PIB. Our results demonstrate that Be-10 concentration changes in marine sediments from glaciated margins are a valuable recorder of ice sheet - ice shelf transitions. Conference Object Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Pine Island Pine Island Bay West Antarctica Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Reconstruction of the past dynamics of the Antarctic ice sheets by studying records from their margin is essential to evaluate their stability and their contribution to future sea level rise. Recently, the first direct evidence for a paleo-subglacial lake on the Antarctic continental shelf was reported from a sediment core from a small bedrock basin in Pine Island Bay (PIB), West Antarctica. Here we report further evidence for this paleosubglacial lake based on down-core changes in Be-10 concentrations in the sediments. Very low Be-10 concentration in the lower part of the core indicate limited input of meteoric Be-10, suggesting deposition of the corresponding sediments in isolation from the open ocean. The Be-10 concentration shows a drop within a sand, silt and mud interval in the middle part of the core that was interpreted to result from deposition during the transition from the subglacial lake to a sub-ice shelf cavern caused by grounding line retreat in PIB around 11 kyrs B.P. The Be-10 concentration increases significantly toward the top of the core, indicating the establishment of an open marine setting later during the Holocene. In addition, we report new Be-10 data from marine sediment cores in other parts of PIB. Our results demonstrate that Be-10 concentration changes in marine sediments from glaciated margins are a valuable recorder of ice sheet - ice shelf transitions. |
format |
Conference Object |
author |
Suganuma, Yusuke Kuhn, Gerhard Hillenbrand, Claus-Dieter Zondervan, Albert |
spellingShingle |
Suganuma, Yusuke Kuhn, Gerhard Hillenbrand, Claus-Dieter Zondervan, Albert Ice Retreat History in Pine Island Bay, Revealed by Sedimentary Be-10 Records |
author_facet |
Suganuma, Yusuke Kuhn, Gerhard Hillenbrand, Claus-Dieter Zondervan, Albert |
author_sort |
Suganuma, Yusuke |
title |
Ice Retreat History in Pine Island Bay, Revealed by Sedimentary Be-10 Records |
title_short |
Ice Retreat History in Pine Island Bay, Revealed by Sedimentary Be-10 Records |
title_full |
Ice Retreat History in Pine Island Bay, Revealed by Sedimentary Be-10 Records |
title_fullStr |
Ice Retreat History in Pine Island Bay, Revealed by Sedimentary Be-10 Records |
title_full_unstemmed |
Ice Retreat History in Pine Island Bay, Revealed by Sedimentary Be-10 Records |
title_sort |
ice retreat history in pine island bay, revealed by sedimentary be-10 records |
publisher |
SCAR |
publishDate |
2018 |
url |
https://epic.awi.de/id/eprint/51991/ https://epic.awi.de/id/eprint/51991/1/Suganuma_etal_polar2018_abstr.pdf http://www.professionalabstracts.com/POLAR2018/iPlanner https://hdl.handle.net/10013/epic.fc0e6997-70e0-4a0c-9ca7-a7ee1bbac25b |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Pine Island Pine Island Bay West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Pine Island Pine Island Bay West Antarctica |
op_source |
EPIC3POLAR2018 SCAR/IASC Open Science Conference, Davos, 2018-06-19-2018-06-23Davos, SCAR |
op_relation |
https://epic.awi.de/id/eprint/51991/1/Suganuma_etal_polar2018_abstr.pdf Suganuma, Y. , Kuhn, G. orcid:0000-0001-6069-7485 , Hillenbrand, C. D. and Zondervan, A. (2018) Ice Retreat History in Pine Island Bay, Revealed by Sedimentary Be-10 Records , POLAR2018 SCAR/IASC Open Science Conference, Davos, 19 June 2018 - 23 June 2018 . hdl:10013/epic.fc0e6997-70e0-4a0c-9ca7-a7ee1bbac25b |
_version_ |
1810488705397293056 |