A one-dimensional temperature and age modeling study for selecting the drill site of the oldest ice core near Dome Fuji, Antarctica
The recovery of a new Antarctic ice core spanning the past ∼ 1.5 million years will advance our understanding of climate system dynamics during the Quaternary. Recently, glaciological field surveys have been conducted to select the most suitable core location near Dome Fuji (DF), Antarctica. Specifi...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2023
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-17-2543-2023 https://doaj.org/article/4a4db3a69ddb4bc6968b4899fb26301b |
id |
ftdoajarticles:oai:doaj.org/article:4a4db3a69ddb4bc6968b4899fb26301b |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:4a4db3a69ddb4bc6968b4899fb26301b 2023-07-23T04:14:34+02:00 A one-dimensional temperature and age modeling study for selecting the drill site of the oldest ice core near Dome Fuji, Antarctica T. Obase A. Abe-Ouchi F. Saito S. Tsutaki S. Fujita K. Kawamura H. Motoyama 2023-06-01T00:00:00Z https://doi.org/10.5194/tc-17-2543-2023 https://doaj.org/article/4a4db3a69ddb4bc6968b4899fb26301b EN eng Copernicus Publications https://tc.copernicus.org/articles/17/2543/2023/tc-17-2543-2023.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-17-2543-2023 1994-0416 1994-0424 https://doaj.org/article/4a4db3a69ddb4bc6968b4899fb26301b The Cryosphere, Vol 17, Pp 2543-2562 (2023) Environmental sciences GE1-350 Geology QE1-996.5 article 2023 ftdoajarticles https://doi.org/10.5194/tc-17-2543-2023 2023-07-02T00:35:18Z The recovery of a new Antarctic ice core spanning the past ∼ 1.5 million years will advance our understanding of climate system dynamics during the Quaternary. Recently, glaciological field surveys have been conducted to select the most suitable core location near Dome Fuji (DF), Antarctica. Specifically, ground-based radar-echo soundings have been used to acquire highly detailed images of bedrock topography and internal ice layers. In this study, we use a one-dimensional (1-D) ice-flow model to compute the temporal evolutions of age and temperature, in which the ice flow is linked with not only transient climate forcing associated with past glacial–interglacial cycles but also transient basal melting diagnosed along the evolving temperature profile. We investigated the influence of ice thickness, accumulation rate, and geothermal heat flux on the age and temperature profiles. The model was constrained by the observed temperature and age profiles reconstructed from the DF ice-core analysis. The results of sensitivity experiments indicate that ice thickness is the most crucial parameter influencing the computed age of the ice because it is critical to the history of basal temperature and basal melting, which can eliminate old ice. The 1-D model was applied to a 54 km long transect in the vicinity of DF and compared with radargram data. We found that the basal age of the ice is mostly controlled by the local ice thickness, demonstrating the importance of high-spatial-resolution surveys of bedrock topography for selecting ice-core drilling sites. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core The Cryosphere Directory of Open Access Journals: DOAJ Articles Antarctic Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) The Cryosphere 17 6 2543 2562 |
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 T. Obase A. Abe-Ouchi F. Saito S. Tsutaki S. Fujita K. Kawamura H. Motoyama A one-dimensional temperature and age modeling study for selecting the drill site of the oldest ice core near Dome Fuji, Antarctica |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
The recovery of a new Antarctic ice core spanning the past ∼ 1.5 million years will advance our understanding of climate system dynamics during the Quaternary. Recently, glaciological field surveys have been conducted to select the most suitable core location near Dome Fuji (DF), Antarctica. Specifically, ground-based radar-echo soundings have been used to acquire highly detailed images of bedrock topography and internal ice layers. In this study, we use a one-dimensional (1-D) ice-flow model to compute the temporal evolutions of age and temperature, in which the ice flow is linked with not only transient climate forcing associated with past glacial–interglacial cycles but also transient basal melting diagnosed along the evolving temperature profile. We investigated the influence of ice thickness, accumulation rate, and geothermal heat flux on the age and temperature profiles. The model was constrained by the observed temperature and age profiles reconstructed from the DF ice-core analysis. The results of sensitivity experiments indicate that ice thickness is the most crucial parameter influencing the computed age of the ice because it is critical to the history of basal temperature and basal melting, which can eliminate old ice. The 1-D model was applied to a 54 km long transect in the vicinity of DF and compared with radargram data. We found that the basal age of the ice is mostly controlled by the local ice thickness, demonstrating the importance of high-spatial-resolution surveys of bedrock topography for selecting ice-core drilling sites. |
format |
Article in Journal/Newspaper |
author |
T. Obase A. Abe-Ouchi F. Saito S. Tsutaki S. Fujita K. Kawamura H. Motoyama |
author_facet |
T. Obase A. Abe-Ouchi F. Saito S. Tsutaki S. Fujita K. Kawamura H. Motoyama |
author_sort |
T. Obase |
title |
A one-dimensional temperature and age modeling study for selecting the drill site of the oldest ice core near Dome Fuji, Antarctica |
title_short |
A one-dimensional temperature and age modeling study for selecting the drill site of the oldest ice core near Dome Fuji, Antarctica |
title_full |
A one-dimensional temperature and age modeling study for selecting the drill site of the oldest ice core near Dome Fuji, Antarctica |
title_fullStr |
A one-dimensional temperature and age modeling study for selecting the drill site of the oldest ice core near Dome Fuji, Antarctica |
title_full_unstemmed |
A one-dimensional temperature and age modeling study for selecting the drill site of the oldest ice core near Dome Fuji, Antarctica |
title_sort |
one-dimensional temperature and age modeling study for selecting the drill site of the oldest ice core near dome fuji, antarctica |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-2543-2023 https://doaj.org/article/4a4db3a69ddb4bc6968b4899fb26301b |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) |
geographic |
Antarctic Dome Fuji |
geographic_facet |
Antarctic Dome Fuji |
genre |
Antarc* Antarctic Antarctica ice core The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica ice core The Cryosphere |
op_source |
The Cryosphere, Vol 17, Pp 2543-2562 (2023) |
op_relation |
https://tc.copernicus.org/articles/17/2543/2023/tc-17-2543-2023.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-17-2543-2023 1994-0416 1994-0424 https://doaj.org/article/4a4db3a69ddb4bc6968b4899fb26301b |
op_doi |
https://doi.org/10.5194/tc-17-2543-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
6 |
container_start_page |
2543 |
op_container_end_page |
2562 |
_version_ |
1772185705156444160 |