Physical properties of the WAIS Divide ice core
The WAIS (West Antarctic Ice Sheet) Divide deep ice core was recently completed to a total depth of 3405 m, ending ~50 m above the bed. Investigation of the visual stratigraphy and grain characteristics indicates that the ice column at the drilling location is undisturbed by any large-scale overturn...
Published in: | Journal of Glaciology |
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Language: | English |
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2014
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Online Access: | https://eprints.soton.ac.uk/376993/ |
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ftsouthampton:oai:eprints.soton.ac.uk:376993 2023-07-30T03:58:35+02:00 Physical properties of the WAIS Divide ice core Fitzpatrick, Joan J. Voigt, Donald E. Fegyveresi, John M. Stevens, Nathan T. Spencer, Matthew K. Cole-Dai, Jihong Alley, Richard B. Jardine, Gabriella E. Cravens, Eric D. Wilen, Lawrence A. Fudge, T.J. McConnell, Joseph R. 2014-12 https://eprints.soton.ac.uk/376993/ English eng Fitzpatrick, Joan J., Voigt, Donald E., Fegyveresi, John M., Stevens, Nathan T., Spencer, Matthew K., Cole-Dai, Jihong, Alley, Richard B., Jardine, Gabriella E., Cravens, Eric D., Wilen, Lawrence A., Fudge, T.J. and McConnell, Joseph R. (2014) Physical properties of the WAIS Divide ice core. Journal of Glaciology, 60 (224), 1181-1198. (doi:10.3189/2014JoG14J100 <http://dx.doi.org/10.3189/2014JoG14J100>). Article PeerReviewed 2014 ftsouthampton https://doi.org/10.3189/2014JoG14J100 2023-07-09T21:59:01Z The WAIS (West Antarctic Ice Sheet) Divide deep ice core was recently completed to a total depth of 3405 m, ending ~50 m above the bed. Investigation of the visual stratigraphy and grain characteristics indicates that the ice column at the drilling location is undisturbed by any large-scale overturning or discontinuity. The climate record developed from this core is therefore likely to be continuous and robust. Measured grain-growth rates, recrystallization characteristics, and grain-size response at climate transitions fit within current understanding. Significant impurity control on grain size is indicated from correlation analysis between impurity loading and grain size. Bubble-number densities and bubble sizes and shapes are presented through the full extent of the bubbly ice. Where bubble elongation is observed, the direction of elongation is preferentially parallel to the trace of the basal (0001) plane. Preferred crystallographic orientation of grains is present in the shallowest samples measured, and increases with depth, progressing to a vertical-girdle pattern that tightens to a vertical single-maximum fabric. This single-maximum fabric switches into multiple maxima as the grain size increases rapidly in the deepest, warmest ice. A strong dependence of the fabric on the impurity- mediated grain size is apparent in the deepest samples. Article in Journal/Newspaper Antarc* Antarctic ice core Ice Sheet Journal of Glaciology University of Southampton: e-Prints Soton Antarctic West Antarctic Ice Sheet Journal of Glaciology 60 224 1181 1198 |
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Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
The WAIS (West Antarctic Ice Sheet) Divide deep ice core was recently completed to a total depth of 3405 m, ending ~50 m above the bed. Investigation of the visual stratigraphy and grain characteristics indicates that the ice column at the drilling location is undisturbed by any large-scale overturning or discontinuity. The climate record developed from this core is therefore likely to be continuous and robust. Measured grain-growth rates, recrystallization characteristics, and grain-size response at climate transitions fit within current understanding. Significant impurity control on grain size is indicated from correlation analysis between impurity loading and grain size. Bubble-number densities and bubble sizes and shapes are presented through the full extent of the bubbly ice. Where bubble elongation is observed, the direction of elongation is preferentially parallel to the trace of the basal (0001) plane. Preferred crystallographic orientation of grains is present in the shallowest samples measured, and increases with depth, progressing to a vertical-girdle pattern that tightens to a vertical single-maximum fabric. This single-maximum fabric switches into multiple maxima as the grain size increases rapidly in the deepest, warmest ice. A strong dependence of the fabric on the impurity- mediated grain size is apparent in the deepest samples. |
format |
Article in Journal/Newspaper |
author |
Fitzpatrick, Joan J. Voigt, Donald E. Fegyveresi, John M. Stevens, Nathan T. Spencer, Matthew K. Cole-Dai, Jihong Alley, Richard B. Jardine, Gabriella E. Cravens, Eric D. Wilen, Lawrence A. Fudge, T.J. McConnell, Joseph R. |
spellingShingle |
Fitzpatrick, Joan J. Voigt, Donald E. Fegyveresi, John M. Stevens, Nathan T. Spencer, Matthew K. Cole-Dai, Jihong Alley, Richard B. Jardine, Gabriella E. Cravens, Eric D. Wilen, Lawrence A. Fudge, T.J. McConnell, Joseph R. Physical properties of the WAIS Divide ice core |
author_facet |
Fitzpatrick, Joan J. Voigt, Donald E. Fegyveresi, John M. Stevens, Nathan T. Spencer, Matthew K. Cole-Dai, Jihong Alley, Richard B. Jardine, Gabriella E. Cravens, Eric D. Wilen, Lawrence A. Fudge, T.J. McConnell, Joseph R. |
author_sort |
Fitzpatrick, Joan J. |
title |
Physical properties of the WAIS Divide ice core |
title_short |
Physical properties of the WAIS Divide ice core |
title_full |
Physical properties of the WAIS Divide ice core |
title_fullStr |
Physical properties of the WAIS Divide ice core |
title_full_unstemmed |
Physical properties of the WAIS Divide ice core |
title_sort |
physical properties of the wais divide ice core |
publishDate |
2014 |
url |
https://eprints.soton.ac.uk/376993/ |
geographic |
Antarctic West Antarctic Ice Sheet |
geographic_facet |
Antarctic West Antarctic Ice Sheet |
genre |
Antarc* Antarctic ice core Ice Sheet Journal of Glaciology |
genre_facet |
Antarc* Antarctic ice core Ice Sheet Journal of Glaciology |
op_relation |
Fitzpatrick, Joan J., Voigt, Donald E., Fegyveresi, John M., Stevens, Nathan T., Spencer, Matthew K., Cole-Dai, Jihong, Alley, Richard B., Jardine, Gabriella E., Cravens, Eric D., Wilen, Lawrence A., Fudge, T.J. and McConnell, Joseph R. (2014) Physical properties of the WAIS Divide ice core. Journal of Glaciology, 60 (224), 1181-1198. (doi:10.3189/2014JoG14J100 <http://dx.doi.org/10.3189/2014JoG14J100>). |
op_doi |
https://doi.org/10.3189/2014JoG14J100 |
container_title |
Journal of Glaciology |
container_volume |
60 |
container_issue |
224 |
container_start_page |
1181 |
op_container_end_page |
1198 |
_version_ |
1772821350386237440 |