Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition – implications for Oldest Ice
The international endeavour to retrieve a continuous ice core, which spans the middle Pleistocene climate transition ca. 1.2–0.9 Myr ago, encompasses a multitude of field and model-based pre-site surveys. We expand on the current efforts to locate a suitable drilling site for the oldest Antarctic ic...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2019
|
Subjects: | |
Online Access: | https://boris.unibe.ch/132088/1/sutter19tc.pdf https://boris.unibe.ch/132088/ https://www.the-cryosphere.net/13/2023/2019/ |
id |
ftunivbern:oai:boris.unibe.ch:132088 |
---|---|
record_format |
openpolar |
spelling |
ftunivbern:oai:boris.unibe.ch:132088 2023-08-20T04:00:00+02:00 Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition – implications for Oldest Ice Sutter, Johannes Carl Roderick Fischer, Hubertus Grosfeld, Klaus Karlsson, Nanna B. Kleiner, Thomas Van Liefferinge, Brice Eisen, Olaf 2019 application/pdf https://boris.unibe.ch/132088/1/sutter19tc.pdf https://boris.unibe.ch/132088/ https://www.the-cryosphere.net/13/2023/2019/ eng eng Copernicus Publications https://boris.unibe.ch/132088/ info:eu-repo/semantics/openAccess Sutter, Johannes Carl Roderick; Fischer, Hubertus; Grosfeld, Klaus; Karlsson, Nanna B.; Kleiner, Thomas; Van Liefferinge, Brice; Eisen, Olaf (2019). Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition – implications for Oldest Ice. The Cryosphere, 13(7), pp. 2023-2041. Copernicus Publications 10.5194/tc-13-2023-2019 <http://dx.doi.org/10.5194/tc-13-2023-2019> 530 Physics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2019 ftunivbern https://doi.org/10.5194/tc-13-2023-2019 2023-07-31T21:53:07Z The international endeavour to retrieve a continuous ice core, which spans the middle Pleistocene climate transition ca. 1.2–0.9 Myr ago, encompasses a multitude of field and model-based pre-site surveys. We expand on the current efforts to locate a suitable drilling site for the oldest Antarctic ice core by means of 3-D continental ice-sheet modelling. To this end, we present an ensemble of ice-sheet simulations spanning the last 2 Myr, employing transient boundary conditions derived from climate modelling and climate proxy records. We discuss the imprint of changing climate conditions, sea level and geothermal heat flux on the ice thickness, and basal conditions around previously identified sites with continuous records of old ice. Our modelling results show a range of configurational ice-sheet changes across the middle Pleistocene transition, suggesting a potential shift of the West Antarctic Ice Sheet to a marine-based configuration. Despite the middle Pleistocene climate reorganisation and associated ice-dynamic changes, we identify several regions conducive to conditions maintaining 1.5 Myr (million years) old ice, particularly around Dome Fuji, Dome C and Ridge B, which is in agreement with previous studies. This finding strengthens the notion that continuous records with such old ice do exist in previously identified regions, while we are also providing a dynamic continental ice-sheet context. Article in Journal/Newspaper Antarc* Antarctic ice core Ice Sheet The Cryosphere BORIS (Bern Open Repository and Information System, University of Bern) Antarctic Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) Endeavour ENVELOPE(162.000,162.000,-76.550,-76.550) The Antarctic West Antarctic Ice Sheet The Cryosphere 13 7 2023 2041 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics Sutter, Johannes Carl Roderick Fischer, Hubertus Grosfeld, Klaus Karlsson, Nanna B. Kleiner, Thomas Van Liefferinge, Brice Eisen, Olaf Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition – implications for Oldest Ice |
topic_facet |
530 Physics |
description |
The international endeavour to retrieve a continuous ice core, which spans the middle Pleistocene climate transition ca. 1.2–0.9 Myr ago, encompasses a multitude of field and model-based pre-site surveys. We expand on the current efforts to locate a suitable drilling site for the oldest Antarctic ice core by means of 3-D continental ice-sheet modelling. To this end, we present an ensemble of ice-sheet simulations spanning the last 2 Myr, employing transient boundary conditions derived from climate modelling and climate proxy records. We discuss the imprint of changing climate conditions, sea level and geothermal heat flux on the ice thickness, and basal conditions around previously identified sites with continuous records of old ice. Our modelling results show a range of configurational ice-sheet changes across the middle Pleistocene transition, suggesting a potential shift of the West Antarctic Ice Sheet to a marine-based configuration. Despite the middle Pleistocene climate reorganisation and associated ice-dynamic changes, we identify several regions conducive to conditions maintaining 1.5 Myr (million years) old ice, particularly around Dome Fuji, Dome C and Ridge B, which is in agreement with previous studies. This finding strengthens the notion that continuous records with such old ice do exist in previously identified regions, while we are also providing a dynamic continental ice-sheet context. |
format |
Article in Journal/Newspaper |
author |
Sutter, Johannes Carl Roderick Fischer, Hubertus Grosfeld, Klaus Karlsson, Nanna B. Kleiner, Thomas Van Liefferinge, Brice Eisen, Olaf |
author_facet |
Sutter, Johannes Carl Roderick Fischer, Hubertus Grosfeld, Klaus Karlsson, Nanna B. Kleiner, Thomas Van Liefferinge, Brice Eisen, Olaf |
author_sort |
Sutter, Johannes Carl Roderick |
title |
Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition – implications for Oldest Ice |
title_short |
Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition – implications for Oldest Ice |
title_full |
Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition – implications for Oldest Ice |
title_fullStr |
Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition – implications for Oldest Ice |
title_full_unstemmed |
Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition – implications for Oldest Ice |
title_sort |
modelling the antarctic ice sheet across the mid-pleistocene transition – implications for oldest ice |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://boris.unibe.ch/132088/1/sutter19tc.pdf https://boris.unibe.ch/132088/ https://www.the-cryosphere.net/13/2023/2019/ |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) ENVELOPE(162.000,162.000,-76.550,-76.550) |
geographic |
Antarctic Dome Fuji Endeavour The Antarctic West Antarctic Ice Sheet |
geographic_facet |
Antarctic Dome Fuji Endeavour The Antarctic West Antarctic Ice Sheet |
genre |
Antarc* Antarctic ice core Ice Sheet The Cryosphere |
genre_facet |
Antarc* Antarctic ice core Ice Sheet The Cryosphere |
op_source |
Sutter, Johannes Carl Roderick; Fischer, Hubertus; Grosfeld, Klaus; Karlsson, Nanna B.; Kleiner, Thomas; Van Liefferinge, Brice; Eisen, Olaf (2019). Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition – implications for Oldest Ice. The Cryosphere, 13(7), pp. 2023-2041. Copernicus Publications 10.5194/tc-13-2023-2019 <http://dx.doi.org/10.5194/tc-13-2023-2019> |
op_relation |
https://boris.unibe.ch/132088/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-13-2023-2019 |
container_title |
The Cryosphere |
container_volume |
13 |
container_issue |
7 |
container_start_page |
2023 |
op_container_end_page |
2041 |
_version_ |
1774716379163787264 |