Investigating the spatial representativeness of East Antarctic ice cores: a comparison of ice core and radar-derived surface mass balance over coastal ice rises and Dome Fuji
Surface mass balance (SMB) of the Antarctic Ice Sheet must be better understood to document the current Antarctic contribution to sea-level rise. In situ point data using snow stakes and ice cores are often used to evaluate the state of the ice sheet's mass balance, as well as to assess SMB der...
Published in: | The Cryosphere |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00069774 2023-12-10T09:42:55+01:00 Investigating the spatial representativeness of East Antarctic ice cores: a comparison of ice core and radar-derived surface mass balance over coastal ice rises and Dome Fuji Cavitte, Marie G. P. Goosse, Hugues Matsuoka, Kenichi Wauthy, Sarah Goel, Vikram Dey, Rahul Pratap, Bhanu Van Liefferinge, Brice Meloth, Thamban Tison, Jean-Louis 2023-11 electronic https://doi.org/10.5194/tc-17-4779-2023 https://noa.gwlb.de/receive/cop_mods_00069774 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068145/tc-17-4779-2023.pdf https://tc.copernicus.org/articles/17/4779/2023/tc-17-4779-2023.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-17-4779-2023 https://noa.gwlb.de/receive/cop_mods_00069774 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068145/tc-17-4779-2023.pdf https://tc.copernicus.org/articles/17/4779/2023/tc-17-4779-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/tc-17-4779-2023 2023-11-13T00:22:47Z Surface mass balance (SMB) of the Antarctic Ice Sheet must be better understood to document the current Antarctic contribution to sea-level rise. In situ point data using snow stakes and ice cores are often used to evaluate the state of the ice sheet's mass balance, as well as to assess SMB derived from regional climate models, which are then used to produce future climate projections. However, spatial representativeness of individual point data remains largely unknown, particularly in the coastal regions of Antarctica with highly variable terrain. Here, we compare ice core data collected at the summit of eight ice rises along the coast of Dronning Maud Land, as well as at the Dome Fuji site, and shallow ice-penetrating radar data over these regions. Shallow radar data have the advantage of being spatially extensive, with a temporal resolution that varies between a yearly and multi-year resolution, from which we can derive a SMB record over the entire radar survey. This comparison therefore allows us to evaluate the spatial variability of SMB and the spatial representativeness of ice-core-derived SMB. We found that ice core mean SMB is very local, and the difference with radar-derived SMB increases in a logarithmic fashion as the surface covered by the radar data increases, with a plateau ∼ 1–2 km away from the ice crest for most ice rises, where there are strong wind–topography interactions, and ∼ 10 km where the ice shelves begin. The relative uncertainty in measuring SMB also increases rapidly as we move away from the ice core sites. Five of our ice rise sites show a strong spatial representativeness in terms of temporal variability, while the other three sites show that it is limited to a surface area between 20–120 km2. The Dome Fuji site, on the other hand, shows a small difference between pointwise and area mean SMB, as well as a strong spatial representativeness in terms of temporal variability. We found no simple parameterization that could represent the spatial variability observed at all the sites. ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land ice core Ice Sheet Ice Shelves The Cryosphere Niedersächsisches Online-Archiv NOA Antarctic The Antarctic Dronning Maud Land Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) The Cryosphere 17 11 4779 4795 |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Cavitte, Marie G. P. Goosse, Hugues Matsuoka, Kenichi Wauthy, Sarah Goel, Vikram Dey, Rahul Pratap, Bhanu Van Liefferinge, Brice Meloth, Thamban Tison, Jean-Louis Investigating the spatial representativeness of East Antarctic ice cores: a comparison of ice core and radar-derived surface mass balance over coastal ice rises and Dome Fuji |
topic_facet |
article Verlagsveröffentlichung |
description |
Surface mass balance (SMB) of the Antarctic Ice Sheet must be better understood to document the current Antarctic contribution to sea-level rise. In situ point data using snow stakes and ice cores are often used to evaluate the state of the ice sheet's mass balance, as well as to assess SMB derived from regional climate models, which are then used to produce future climate projections. However, spatial representativeness of individual point data remains largely unknown, particularly in the coastal regions of Antarctica with highly variable terrain. Here, we compare ice core data collected at the summit of eight ice rises along the coast of Dronning Maud Land, as well as at the Dome Fuji site, and shallow ice-penetrating radar data over these regions. Shallow radar data have the advantage of being spatially extensive, with a temporal resolution that varies between a yearly and multi-year resolution, from which we can derive a SMB record over the entire radar survey. This comparison therefore allows us to evaluate the spatial variability of SMB and the spatial representativeness of ice-core-derived SMB. We found that ice core mean SMB is very local, and the difference with radar-derived SMB increases in a logarithmic fashion as the surface covered by the radar data increases, with a plateau ∼ 1–2 km away from the ice crest for most ice rises, where there are strong wind–topography interactions, and ∼ 10 km where the ice shelves begin. The relative uncertainty in measuring SMB also increases rapidly as we move away from the ice core sites. Five of our ice rise sites show a strong spatial representativeness in terms of temporal variability, while the other three sites show that it is limited to a surface area between 20–120 km2. The Dome Fuji site, on the other hand, shows a small difference between pointwise and area mean SMB, as well as a strong spatial representativeness in terms of temporal variability. We found no simple parameterization that could represent the spatial variability observed at all the sites. ... |
format |
Article in Journal/Newspaper |
author |
Cavitte, Marie G. P. Goosse, Hugues Matsuoka, Kenichi Wauthy, Sarah Goel, Vikram Dey, Rahul Pratap, Bhanu Van Liefferinge, Brice Meloth, Thamban Tison, Jean-Louis |
author_facet |
Cavitte, Marie G. P. Goosse, Hugues Matsuoka, Kenichi Wauthy, Sarah Goel, Vikram Dey, Rahul Pratap, Bhanu Van Liefferinge, Brice Meloth, Thamban Tison, Jean-Louis |
author_sort |
Cavitte, Marie G. P. |
title |
Investigating the spatial representativeness of East Antarctic ice cores: a comparison of ice core and radar-derived surface mass balance over coastal ice rises and Dome Fuji |
title_short |
Investigating the spatial representativeness of East Antarctic ice cores: a comparison of ice core and radar-derived surface mass balance over coastal ice rises and Dome Fuji |
title_full |
Investigating the spatial representativeness of East Antarctic ice cores: a comparison of ice core and radar-derived surface mass balance over coastal ice rises and Dome Fuji |
title_fullStr |
Investigating the spatial representativeness of East Antarctic ice cores: a comparison of ice core and radar-derived surface mass balance over coastal ice rises and Dome Fuji |
title_full_unstemmed |
Investigating the spatial representativeness of East Antarctic ice cores: a comparison of ice core and radar-derived surface mass balance over coastal ice rises and Dome Fuji |
title_sort |
investigating the spatial representativeness of east antarctic ice cores: a comparison of ice core and radar-derived surface mass balance over coastal ice rises and dome fuji |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-4779-2023 https://noa.gwlb.de/receive/cop_mods_00069774 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068145/tc-17-4779-2023.pdf https://tc.copernicus.org/articles/17/4779/2023/tc-17-4779-2023.pdf |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) |
geographic |
Antarctic The Antarctic Dronning Maud Land Dome Fuji |
geographic_facet |
Antarctic The Antarctic Dronning Maud Land Dome Fuji |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land ice core Ice Sheet Ice Shelves The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land ice core Ice Sheet Ice Shelves The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-17-4779-2023 https://noa.gwlb.de/receive/cop_mods_00069774 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068145/tc-17-4779-2023.pdf https://tc.copernicus.org/articles/17/4779/2023/tc-17-4779-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-17-4779-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
11 |
container_start_page |
4779 |
op_container_end_page |
4795 |
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1784885960174993408 |