A composite flow law to model deformation in the NEEM deep ice core, Greenland - The role of grain size, grain size distribution and premelting on ice deformation ...
Results from a rheological model based on the composite flow law of Goldsby and Kohlstedt (1997, 2001) applied to mean grain size and grain size distributions in the North Greenland Eemian Ice Drilling (NEEM) deep ice core predict that grain-size-sensitive flow produces almost all of the deformation...
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Online Access: | https://dx.doi.org/10.1594/pangaea.920005 https://doi.pangaea.de/10.1594/PANGAEA.920005 |
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ftdatacite:10.1594/pangaea.920005 2024-03-31T07:53:02+00:00 A composite flow law to model deformation in the NEEM deep ice core, Greenland - The role of grain size, grain size distribution and premelting on ice deformation ... Weikusat, Ilka Kuiper, Ernst-Jan N de Bresser, Johannes H P Jansen, Daniela Pennock, Gillian M Drury, Martyn R 2020 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.920005 https://doi.pangaea.de/10.1594/PANGAEA.920005 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.743296 https://doi.pangaea.de/10.1594/PANGAEA.743296 https://dx.doi.org/10.5194/tc-2018-275 https://dx.doi.org/10.5194/tc-2018-274 https://dx.doi.org/10.1594/pangaea.919775 https://dx.doi.org/10.11588/heidok.00016891 https://dx.doi.org/10.1111/jmi.12029 https://dx.doi.org/10.4028/www.scientific.net/msf.753.481 https://dx.doi.org/10.1016/s1359-6462(97)00246-7 https://dx.doi.org/10.1029/2000jb900336 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 composite flow law grain-size sensitive creep ice strain rate predictions File content File name File format File size Uniform resource locator/link to file Ice drill North Greenland Eemian Ice Drilling NEEM dataset Dataset 2020 ftdatacite https://doi.org/10.1594/pangaea.92000510.5194/tc-2018-27510.5194/tc-2018-27410.1594/pangaea.91977510.11588/heidok.0001689110.1111/jmi.1202910.4028/www.scientific.net/msf.753.48110.1016/s1359-6462(97)00246-710.1029/2000jb900336 2024-03-04T13:34:28Z Results from a rheological model based on the composite flow law of Goldsby and Kohlstedt (1997, 2001) applied to mean grain size and grain size distributions in the North Greenland Eemian Ice Drilling (NEEM) deep ice core predict that grain-size-sensitive flow produces almost all of the deformation in the upper 2207 m, while dislocation creep hardly contributes to deformation. The difference in calculated strain rate between two model end-members is relatively small: (i) the micro-scale constant stress model where each grain deforms by the same stress and (ii) the micro-scale constant strain rate model where each grain deforms by the same strain rate. The predicted strain rate in the fine-grained Glacial ice (that is, ice deposited during the Last Glacial Maximum now at depths of 1419 to 2207 m) varies strongly within this depth range. Predicted strain rate is about 4-5 times higher than in the coarser-grained Holocene ice (0-1419 m). Two peaks in strain rate are predicted at about 1980 and 2100 m of depth. ... Dataset Greenland ice core North Greenland DataCite Metadata Store (German National Library of Science and Technology) Greenland |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
composite flow law grain-size sensitive creep ice strain rate predictions File content File name File format File size Uniform resource locator/link to file Ice drill North Greenland Eemian Ice Drilling NEEM |
spellingShingle |
composite flow law grain-size sensitive creep ice strain rate predictions File content File name File format File size Uniform resource locator/link to file Ice drill North Greenland Eemian Ice Drilling NEEM Weikusat, Ilka Kuiper, Ernst-Jan N de Bresser, Johannes H P Jansen, Daniela Pennock, Gillian M Drury, Martyn R A composite flow law to model deformation in the NEEM deep ice core, Greenland - The role of grain size, grain size distribution and premelting on ice deformation ... |
topic_facet |
composite flow law grain-size sensitive creep ice strain rate predictions File content File name File format File size Uniform resource locator/link to file Ice drill North Greenland Eemian Ice Drilling NEEM |
description |
Results from a rheological model based on the composite flow law of Goldsby and Kohlstedt (1997, 2001) applied to mean grain size and grain size distributions in the North Greenland Eemian Ice Drilling (NEEM) deep ice core predict that grain-size-sensitive flow produces almost all of the deformation in the upper 2207 m, while dislocation creep hardly contributes to deformation. The difference in calculated strain rate between two model end-members is relatively small: (i) the micro-scale constant stress model where each grain deforms by the same stress and (ii) the micro-scale constant strain rate model where each grain deforms by the same strain rate. The predicted strain rate in the fine-grained Glacial ice (that is, ice deposited during the Last Glacial Maximum now at depths of 1419 to 2207 m) varies strongly within this depth range. Predicted strain rate is about 4-5 times higher than in the coarser-grained Holocene ice (0-1419 m). Two peaks in strain rate are predicted at about 1980 and 2100 m of depth. ... |
format |
Dataset |
author |
Weikusat, Ilka Kuiper, Ernst-Jan N de Bresser, Johannes H P Jansen, Daniela Pennock, Gillian M Drury, Martyn R |
author_facet |
Weikusat, Ilka Kuiper, Ernst-Jan N de Bresser, Johannes H P Jansen, Daniela Pennock, Gillian M Drury, Martyn R |
author_sort |
Weikusat, Ilka |
title |
A composite flow law to model deformation in the NEEM deep ice core, Greenland - The role of grain size, grain size distribution and premelting on ice deformation ... |
title_short |
A composite flow law to model deformation in the NEEM deep ice core, Greenland - The role of grain size, grain size distribution and premelting on ice deformation ... |
title_full |
A composite flow law to model deformation in the NEEM deep ice core, Greenland - The role of grain size, grain size distribution and premelting on ice deformation ... |
title_fullStr |
A composite flow law to model deformation in the NEEM deep ice core, Greenland - The role of grain size, grain size distribution and premelting on ice deformation ... |
title_full_unstemmed |
A composite flow law to model deformation in the NEEM deep ice core, Greenland - The role of grain size, grain size distribution and premelting on ice deformation ... |
title_sort |
composite flow law to model deformation in the neem deep ice core, greenland - the role of grain size, grain size distribution and premelting on ice deformation ... |
publisher |
PANGAEA |
publishDate |
2020 |
url |
https://dx.doi.org/10.1594/pangaea.920005 https://doi.pangaea.de/10.1594/PANGAEA.920005 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core North Greenland |
genre_facet |
Greenland ice core North Greenland |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.743296 https://doi.pangaea.de/10.1594/PANGAEA.743296 https://dx.doi.org/10.5194/tc-2018-275 https://dx.doi.org/10.5194/tc-2018-274 https://dx.doi.org/10.1594/pangaea.919775 https://dx.doi.org/10.11588/heidok.00016891 https://dx.doi.org/10.1111/jmi.12029 https://dx.doi.org/10.4028/www.scientific.net/msf.753.481 https://dx.doi.org/10.1016/s1359-6462(97)00246-7 https://dx.doi.org/10.1029/2000jb900336 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.1594/pangaea.92000510.5194/tc-2018-27510.5194/tc-2018-27410.1594/pangaea.91977510.11588/heidok.0001689110.1111/jmi.1202910.4028/www.scientific.net/msf.753.48110.1016/s1359-6462(97)00246-710.1029/2000jb900336 |
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