A site for deep ice coring at West Hercules Dome: results from ground-based geophysics and modeling
Hercules Dome, Antarctica, has long been identified as a prospective deep ice core site due to the undisturbed internal layering, climatic setting and potential to obtain proxy records from the Last Interglacial (LIG) period when the West Antarctic ice sheet may have collapsed. We performed a geophy...
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Cambridge University Press
2023
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ftdoajarticles:oai:doaj.org/article:4ca32c89cd184c8698db619daf5974dd 2023-06-11T04:07:14+02:00 A site for deep ice coring at West Hercules Dome: results from ground-based geophysics and modeling T. J. Fudge Benjamin H. Hills Annika N. Horlings Nicholas Holschuh John Erich Christian Lindsey Davidge Andrew Hoffman Gemma K. O'Connor Knut Christianson Eric J. Steig 2023-06-01T00:00:00Z https://doi.org/10.1017/jog.2022.80 https://doaj.org/article/4ca32c89cd184c8698db619daf5974dd EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143022000806/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.80 0022-1430 1727-5652 https://doaj.org/article/4ca32c89cd184c8698db619daf5974dd Journal of Glaciology, Vol 69, Pp 538-550 (2023) Antarctic glaciology ice core radio-echo sounding Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2023 ftdoajarticles https://doi.org/10.1017/jog.2022.80 2023-05-28T00:37:02Z Hercules Dome, Antarctica, has long been identified as a prospective deep ice core site due to the undisturbed internal layering, climatic setting and potential to obtain proxy records from the Last Interglacial (LIG) period when the West Antarctic ice sheet may have collapsed. We performed a geophysical survey using multiple ice-penetrating radar systems to identify potential locations for a deep ice core at Hercules Dome. The surface topography, as revealed with recent satellite observations, is more complex than previously recognized. The most prominent dome, which we term ‘West Dome’, is the most promising region for a deep ice core for the following reasons: (1) bed-conformal radar reflections indicate minimal layer disturbance and extend to within tens of meters of the ice bottom; (2) the bed is likely frozen, as evidenced by both the shape of the measured vertical ice velocity profiles beneath the divide and modeled ice temperature using three remotely sensed estimates of geothermal flux and (3) models of layer thinning have 132 ka old ice at 45–90 m above the bed with an annual layer thickness of ~1 mm, satisfying the resolution and preservation needed for detailed analysis of the LIG period. Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core Ice Sheet Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Antarctic Dome The ENVELOPE(166.000,166.000,-85.367,-85.367) Hercules ENVELOPE(161.450,161.450,-77.483,-77.483) Hercules Dome ENVELOPE(-105.000,-105.000,-86.000,-86.000) West Antarctic Ice Sheet Journal of Glaciology 1 13 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctic glaciology ice core radio-echo sounding Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Antarctic glaciology ice core radio-echo sounding Environmental sciences GE1-350 Meteorology. Climatology QC851-999 T. J. Fudge Benjamin H. Hills Annika N. Horlings Nicholas Holschuh John Erich Christian Lindsey Davidge Andrew Hoffman Gemma K. O'Connor Knut Christianson Eric J. Steig A site for deep ice coring at West Hercules Dome: results from ground-based geophysics and modeling |
topic_facet |
Antarctic glaciology ice core radio-echo sounding Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Hercules Dome, Antarctica, has long been identified as a prospective deep ice core site due to the undisturbed internal layering, climatic setting and potential to obtain proxy records from the Last Interglacial (LIG) period when the West Antarctic ice sheet may have collapsed. We performed a geophysical survey using multiple ice-penetrating radar systems to identify potential locations for a deep ice core at Hercules Dome. The surface topography, as revealed with recent satellite observations, is more complex than previously recognized. The most prominent dome, which we term ‘West Dome’, is the most promising region for a deep ice core for the following reasons: (1) bed-conformal radar reflections indicate minimal layer disturbance and extend to within tens of meters of the ice bottom; (2) the bed is likely frozen, as evidenced by both the shape of the measured vertical ice velocity profiles beneath the divide and modeled ice temperature using three remotely sensed estimates of geothermal flux and (3) models of layer thinning have 132 ka old ice at 45–90 m above the bed with an annual layer thickness of ~1 mm, satisfying the resolution and preservation needed for detailed analysis of the LIG period. |
format |
Article in Journal/Newspaper |
author |
T. J. Fudge Benjamin H. Hills Annika N. Horlings Nicholas Holschuh John Erich Christian Lindsey Davidge Andrew Hoffman Gemma K. O'Connor Knut Christianson Eric J. Steig |
author_facet |
T. J. Fudge Benjamin H. Hills Annika N. Horlings Nicholas Holschuh John Erich Christian Lindsey Davidge Andrew Hoffman Gemma K. O'Connor Knut Christianson Eric J. Steig |
author_sort |
T. J. Fudge |
title |
A site for deep ice coring at West Hercules Dome: results from ground-based geophysics and modeling |
title_short |
A site for deep ice coring at West Hercules Dome: results from ground-based geophysics and modeling |
title_full |
A site for deep ice coring at West Hercules Dome: results from ground-based geophysics and modeling |
title_fullStr |
A site for deep ice coring at West Hercules Dome: results from ground-based geophysics and modeling |
title_full_unstemmed |
A site for deep ice coring at West Hercules Dome: results from ground-based geophysics and modeling |
title_sort |
site for deep ice coring at west hercules dome: results from ground-based geophysics and modeling |
publisher |
Cambridge University Press |
publishDate |
2023 |
url |
https://doi.org/10.1017/jog.2022.80 https://doaj.org/article/4ca32c89cd184c8698db619daf5974dd |
long_lat |
ENVELOPE(166.000,166.000,-85.367,-85.367) ENVELOPE(161.450,161.450,-77.483,-77.483) ENVELOPE(-105.000,-105.000,-86.000,-86.000) |
geographic |
Antarctic Dome The Hercules Hercules Dome West Antarctic Ice Sheet |
geographic_facet |
Antarctic Dome The Hercules Hercules Dome West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Antarctica ice core Ice Sheet Journal of Glaciology |
genre_facet |
Antarc* Antarctic Antarctica ice core Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 69, Pp 538-550 (2023) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143022000806/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.80 0022-1430 1727-5652 https://doaj.org/article/4ca32c89cd184c8698db619daf5974dd |
op_doi |
https://doi.org/10.1017/jog.2022.80 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
13 |
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1768380201921675264 |