Regional sea-level highstand triggered Holocene ice sheet thinning across coastal Dronning Maud Land, East Antarctica
The East Antarctic Ice Sheet stores a vast amount of freshwater, which makes it the single largest potential contributor to future sea-level rise. However, the lack of well-constrained geological records of past ice sheet changes impedes model validation, hampers mass balance estimates, and inhibits...
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Online Access: | https://hdl.handle.net/11250/3034447 https://doi.org/10.1038/s43247-022-00599-z |
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/3034447 2023-05-15T13:53:35+02:00 Regional sea-level highstand triggered Holocene ice sheet thinning across coastal Dronning Maud Land, East Antarctica Sugunuma, Yusuke Kaneda, Heitaro Mas e Braga, Martim Ishiwa, Takeshige Koyama, Takushi Newall, Jennifer C.H. Okuno, Jun'ichi Obase, Takashi Saito, Fuyuki Rogozhina, Irina Andersen, Jane Lund Kawamata, Moto Hirabayashi, Motohiro Lifton, Nathaniel A. Fredin, Ola Harbor, Jonathan M. Stroeven, Arjen P. Abe-Ouchi, Ayako 2022 application/pdf https://hdl.handle.net/11250/3034447 https://doi.org/10.1038/s43247-022-00599-z eng eng Springer Nature Communications Earth & Environment. 2022, 3, . urn:issn:2662-4435 https://hdl.handle.net/11250/3034447 https://doi.org/10.1038/s43247-022-00599-z cristin:2073399 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 3 Communications Earth & Environment 273 Peer reviewed Journal article 2022 ftntnutrondheimi https://doi.org/10.1038/s43247-022-00599-z 2022-11-30T23:42:46Z The East Antarctic Ice Sheet stores a vast amount of freshwater, which makes it the single largest potential contributor to future sea-level rise. However, the lack of well-constrained geological records of past ice sheet changes impedes model validation, hampers mass balance estimates, and inhibits examination of ice loss mechanisms. Here we identify rapid ice-sheet thinning in coastal Dronning Maud Land from Early to Middle Holocene (9000–5000 years ago) using a deglacial chronology based on in situ cosmogenic nuclide surface exposure dates from central Dronning Maud Land, in concert with numerical simulations of regional and continental ice-sheet evolution. Regional sea-level changes reproduced from our refined ice-load history show a highstand at 9000–8000 years ago. We propose that sea-level rise and a concomitant influx of warmer Circumpolar Deep Water triggered ice shelf breakup via the marine ice sheet instability mechanism, which led to rapid thinning of upstream coastal ice sheet sectors. publishedVersion Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelf NTNU Open Archive (Norwegian University of Science and Technology) Antarctic Dronning Maud Land East Antarctic Ice Sheet East Antarctica Communications Earth & Environment 3 1 |
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Open Polar |
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NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
The East Antarctic Ice Sheet stores a vast amount of freshwater, which makes it the single largest potential contributor to future sea-level rise. However, the lack of well-constrained geological records of past ice sheet changes impedes model validation, hampers mass balance estimates, and inhibits examination of ice loss mechanisms. Here we identify rapid ice-sheet thinning in coastal Dronning Maud Land from Early to Middle Holocene (9000–5000 years ago) using a deglacial chronology based on in situ cosmogenic nuclide surface exposure dates from central Dronning Maud Land, in concert with numerical simulations of regional and continental ice-sheet evolution. Regional sea-level changes reproduced from our refined ice-load history show a highstand at 9000–8000 years ago. We propose that sea-level rise and a concomitant influx of warmer Circumpolar Deep Water triggered ice shelf breakup via the marine ice sheet instability mechanism, which led to rapid thinning of upstream coastal ice sheet sectors. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Sugunuma, Yusuke Kaneda, Heitaro Mas e Braga, Martim Ishiwa, Takeshige Koyama, Takushi Newall, Jennifer C.H. Okuno, Jun'ichi Obase, Takashi Saito, Fuyuki Rogozhina, Irina Andersen, Jane Lund Kawamata, Moto Hirabayashi, Motohiro Lifton, Nathaniel A. Fredin, Ola Harbor, Jonathan M. Stroeven, Arjen P. Abe-Ouchi, Ayako |
spellingShingle |
Sugunuma, Yusuke Kaneda, Heitaro Mas e Braga, Martim Ishiwa, Takeshige Koyama, Takushi Newall, Jennifer C.H. Okuno, Jun'ichi Obase, Takashi Saito, Fuyuki Rogozhina, Irina Andersen, Jane Lund Kawamata, Moto Hirabayashi, Motohiro Lifton, Nathaniel A. Fredin, Ola Harbor, Jonathan M. Stroeven, Arjen P. Abe-Ouchi, Ayako Regional sea-level highstand triggered Holocene ice sheet thinning across coastal Dronning Maud Land, East Antarctica |
author_facet |
Sugunuma, Yusuke Kaneda, Heitaro Mas e Braga, Martim Ishiwa, Takeshige Koyama, Takushi Newall, Jennifer C.H. Okuno, Jun'ichi Obase, Takashi Saito, Fuyuki Rogozhina, Irina Andersen, Jane Lund Kawamata, Moto Hirabayashi, Motohiro Lifton, Nathaniel A. Fredin, Ola Harbor, Jonathan M. Stroeven, Arjen P. Abe-Ouchi, Ayako |
author_sort |
Sugunuma, Yusuke |
title |
Regional sea-level highstand triggered Holocene ice sheet thinning across coastal Dronning Maud Land, East Antarctica |
title_short |
Regional sea-level highstand triggered Holocene ice sheet thinning across coastal Dronning Maud Land, East Antarctica |
title_full |
Regional sea-level highstand triggered Holocene ice sheet thinning across coastal Dronning Maud Land, East Antarctica |
title_fullStr |
Regional sea-level highstand triggered Holocene ice sheet thinning across coastal Dronning Maud Land, East Antarctica |
title_full_unstemmed |
Regional sea-level highstand triggered Holocene ice sheet thinning across coastal Dronning Maud Land, East Antarctica |
title_sort |
regional sea-level highstand triggered holocene ice sheet thinning across coastal dronning maud land, east antarctica |
publisher |
Springer Nature |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3034447 https://doi.org/10.1038/s43247-022-00599-z |
geographic |
Antarctic Dronning Maud Land East Antarctic Ice Sheet East Antarctica |
geographic_facet |
Antarctic Dronning Maud Land East Antarctic Ice Sheet East Antarctica |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Ice Shelf |
op_source |
3 Communications Earth & Environment 273 |
op_relation |
Communications Earth & Environment. 2022, 3, . urn:issn:2662-4435 https://hdl.handle.net/11250/3034447 https://doi.org/10.1038/s43247-022-00599-z cristin:2073399 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s43247-022-00599-z |
container_title |
Communications Earth & Environment |
container_volume |
3 |
container_issue |
1 |
_version_ |
1766258789237915648 |