Optimal site selection for a high-resolution ice core record in East Antarctica
Ice cores provide some of the best-dated and most comprehensive proxy records, as they yield a vast and growing array of proxy indicators. Selecting a site for ice core drilling is nonetheless challenging, as the assessment of potential new sites needs to consider a variety of factors. Here, we demo...
Published in: | Climate of the Past |
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/143578 2024-01-14T10:00:37+01:00 Optimal site selection for a high-resolution ice core record in East Antarctica Vance, Tessa R. Roberts, Jason L. Moy, Andrew D. Curran, Mark A. J. Tozer, Carly R. Gallant, Ailie J. E. Abram, Nerilie van Ommen, Tas Young, Duncan A. Grima, Cyril Blankenship, Don D. Siegert, Martin J. application/pdf http://hdl.handle.net/1885/143578 https://doi.org/10.5194/cp-12-595-2016 https://openresearch-repository.anu.edu.au/bitstream/1885/143578/4/Vance2016_Clim%20Past_Antarctic%20ice%20core%20site%20planning.pdf.jpg unknown European Geosciences Union http://purl.org/au-research/grants/arc/DP140102059 1814-9332 http://hdl.handle.net/1885/143578 doi:10.5194/cp-12-595-2016 https://openresearch-repository.anu.edu.au/bitstream/1885/143578/4/Vance2016_Clim%20Past_Antarctic%20ice%20core%20site%20planning.pdf.jpg © Author(s) 2016. CC Attribution 3.0 License. Climate of the Past Journal article ftanucanberra https://doi.org/10.5194/cp-12-595-2016 2023-12-15T09:33:10Z Ice cores provide some of the best-dated and most comprehensive proxy records, as they yield a vast and growing array of proxy indicators. Selecting a site for ice core drilling is nonetheless challenging, as the assessment of potential new sites needs to consider a variety of factors. Here, we demonstrate a systematic approach to site selection for a new East Antarctic high-resolution ice core record. Specifically, seven criteria are considered: (1) 2000-year-old ice at 300 m depth; (2) above 1000 m elevation; (3) a minimum accumulation rate of 250 mm years−1 IE (ice equivalent); (4) minimal surface reworking to preserve the deposited climate signal; (5) a site with minimal displacement or elevation change in ice at 300 m depth; (6) a strong teleconnection to midlatitude climate; and (7) an appropriately complementary relationship to the existing Law Dome record (a high-resolution record in East Antarctica). Once assessment of these physical characteristics identified promising regions, logistical considerations (for site access and ice core retrieval) were briefly considered. We use Antarctic surface mass balance syntheses, along with ground-truthing of satellite data by airborne radar surveys to produce all-of-Antarctica maps of surface roughness, age at specified depth, elevation and displacement change, and surface air temperature correlations to pinpoint promising locations. We also use the European Centre for Medium-Range Weather Forecast ERA 20th Century reanalysis (ERA-20C) to ensure that a site complementary to the Law Dome record is selected. We find three promising sites in the Indian Ocean sector of East Antarctica in the coastal zone from Enderby Land to the Ingrid Christensen Coast (50–100° E). Although we focus on East Antarctica for a new ice core site, the methodology is more generally applicable, and we include key parameters for all of Antarctica which may be useful for ice core site selection elsewhere and/or for other purposes. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Enderby Land ice core Ingrid Christensen Coast Australian National University: ANU Digital Collections Antarctic East Antarctica Indian Christensen ENVELOPE(47.867,47.867,-67.967,-67.967) Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Ingrid Christensen Coast ENVELOPE(77.000,77.000,-69.500,-69.500) Climate of the Past 12 3 595 610 |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
description |
Ice cores provide some of the best-dated and most comprehensive proxy records, as they yield a vast and growing array of proxy indicators. Selecting a site for ice core drilling is nonetheless challenging, as the assessment of potential new sites needs to consider a variety of factors. Here, we demonstrate a systematic approach to site selection for a new East Antarctic high-resolution ice core record. Specifically, seven criteria are considered: (1) 2000-year-old ice at 300 m depth; (2) above 1000 m elevation; (3) a minimum accumulation rate of 250 mm years−1 IE (ice equivalent); (4) minimal surface reworking to preserve the deposited climate signal; (5) a site with minimal displacement or elevation change in ice at 300 m depth; (6) a strong teleconnection to midlatitude climate; and (7) an appropriately complementary relationship to the existing Law Dome record (a high-resolution record in East Antarctica). Once assessment of these physical characteristics identified promising regions, logistical considerations (for site access and ice core retrieval) were briefly considered. We use Antarctic surface mass balance syntheses, along with ground-truthing of satellite data by airborne radar surveys to produce all-of-Antarctica maps of surface roughness, age at specified depth, elevation and displacement change, and surface air temperature correlations to pinpoint promising locations. We also use the European Centre for Medium-Range Weather Forecast ERA 20th Century reanalysis (ERA-20C) to ensure that a site complementary to the Law Dome record is selected. We find three promising sites in the Indian Ocean sector of East Antarctica in the coastal zone from Enderby Land to the Ingrid Christensen Coast (50–100° E). Although we focus on East Antarctica for a new ice core site, the methodology is more generally applicable, and we include key parameters for all of Antarctica which may be useful for ice core site selection elsewhere and/or for other purposes. |
format |
Article in Journal/Newspaper |
author |
Vance, Tessa R. Roberts, Jason L. Moy, Andrew D. Curran, Mark A. J. Tozer, Carly R. Gallant, Ailie J. E. Abram, Nerilie van Ommen, Tas Young, Duncan A. Grima, Cyril Blankenship, Don D. Siegert, Martin J. |
spellingShingle |
Vance, Tessa R. Roberts, Jason L. Moy, Andrew D. Curran, Mark A. J. Tozer, Carly R. Gallant, Ailie J. E. Abram, Nerilie van Ommen, Tas Young, Duncan A. Grima, Cyril Blankenship, Don D. Siegert, Martin J. Optimal site selection for a high-resolution ice core record in East Antarctica |
author_facet |
Vance, Tessa R. Roberts, Jason L. Moy, Andrew D. Curran, Mark A. J. Tozer, Carly R. Gallant, Ailie J. E. Abram, Nerilie van Ommen, Tas Young, Duncan A. Grima, Cyril Blankenship, Don D. Siegert, Martin J. |
author_sort |
Vance, Tessa R. |
title |
Optimal site selection for a high-resolution ice core record in East Antarctica |
title_short |
Optimal site selection for a high-resolution ice core record in East Antarctica |
title_full |
Optimal site selection for a high-resolution ice core record in East Antarctica |
title_fullStr |
Optimal site selection for a high-resolution ice core record in East Antarctica |
title_full_unstemmed |
Optimal site selection for a high-resolution ice core record in East Antarctica |
title_sort |
optimal site selection for a high-resolution ice core record in east antarctica |
publisher |
European Geosciences Union |
url |
http://hdl.handle.net/1885/143578 https://doi.org/10.5194/cp-12-595-2016 https://openresearch-repository.anu.edu.au/bitstream/1885/143578/4/Vance2016_Clim%20Past_Antarctic%20ice%20core%20site%20planning.pdf.jpg |
long_lat |
ENVELOPE(47.867,47.867,-67.967,-67.967) ENVELOPE(112.833,112.833,-66.733,-66.733) ENVELOPE(77.000,77.000,-69.500,-69.500) |
geographic |
Antarctic East Antarctica Indian Christensen Law Dome Ingrid Christensen Coast |
geographic_facet |
Antarctic East Antarctica Indian Christensen Law Dome Ingrid Christensen Coast |
genre |
Antarc* Antarctic Antarctica East Antarctica Enderby Land ice core Ingrid Christensen Coast |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Enderby Land ice core Ingrid Christensen Coast |
op_source |
Climate of the Past |
op_relation |
http://purl.org/au-research/grants/arc/DP140102059 1814-9332 http://hdl.handle.net/1885/143578 doi:10.5194/cp-12-595-2016 https://openresearch-repository.anu.edu.au/bitstream/1885/143578/4/Vance2016_Clim%20Past_Antarctic%20ice%20core%20site%20planning.pdf.jpg |
op_rights |
© Author(s) 2016. CC Attribution 3.0 License. |
op_doi |
https://doi.org/10.5194/cp-12-595-2016 |
container_title |
Climate of the Past |
container_volume |
12 |
container_issue |
3 |
container_start_page |
595 |
op_container_end_page |
610 |
_version_ |
1788066498477031424 |