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...
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ftdoajarticles:oai:doaj.org/article:0890ae897e3949d6b63c96c6c240609f 2023-05-15T13:56:45+02:00 Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition – implications for Oldest Ice J. Sutter H. Fischer K. Grosfeld N. B. Karlsson T. Kleiner B. Van Liefferinge O. Eisen 2019-07-01T00:00:00Z https://doi.org/10.5194/tc-13-2023-2019 https://doaj.org/article/0890ae897e3949d6b63c96c6c240609f EN eng Copernicus Publications https://www.the-cryosphere.net/13/2023/2019/tc-13-2023-2019.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-13-2023-2019 1994-0416 1994-0424 https://doaj.org/article/0890ae897e3949d6b63c96c6c240609f The Cryosphere, Vol 13, Pp 2023-2041 (2019) Environmental sciences GE1-350 Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.5194/tc-13-2023-2019 2022-12-31T04:17:13Z 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 Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic West Antarctic Ice Sheet Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) Endeavour ENVELOPE(162.000,162.000,-76.550,-76.550) The Cryosphere 13 7 2023 2041 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 J. Sutter H. Fischer K. Grosfeld N. B. Karlsson T. Kleiner B. Van Liefferinge O. Eisen Modelling the Antarctic Ice Sheet across the mid-Pleistocene transition – implications for Oldest Ice |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
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 |
J. Sutter H. Fischer K. Grosfeld N. B. Karlsson T. Kleiner B. Van Liefferinge O. Eisen |
author_facet |
J. Sutter H. Fischer K. Grosfeld N. B. Karlsson T. Kleiner B. Van Liefferinge O. Eisen |
author_sort |
J. Sutter |
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://doi.org/10.5194/tc-13-2023-2019 https://doaj.org/article/0890ae897e3949d6b63c96c6c240609f |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) ENVELOPE(162.000,162.000,-76.550,-76.550) |
geographic |
Antarctic The Antarctic West Antarctic Ice Sheet Dome Fuji Endeavour |
geographic_facet |
Antarctic The Antarctic West Antarctic Ice Sheet Dome Fuji Endeavour |
genre |
Antarc* Antarctic ice core Ice Sheet The Cryosphere |
genre_facet |
Antarc* Antarctic ice core Ice Sheet The Cryosphere |
op_source |
The Cryosphere, Vol 13, Pp 2023-2041 (2019) |
op_relation |
https://www.the-cryosphere.net/13/2023/2019/tc-13-2023-2019.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-13-2023-2019 1994-0416 1994-0424 https://doaj.org/article/0890ae897e3949d6b63c96c6c240609f |
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 |
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1766264340597440512 |