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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Language: | English |
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PANGAEA
2020
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.920005 https://doi.org/10.1594/PANGAEA.920005 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.920005 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
composite flow law File content File format File name File size grain-size sensitive creep Greenland ice ICEDRILL Ice drill NEEM North Greenland Eemian Ice Drilling strain rate predictions Uniform resource locator/link to file |
spellingShingle |
composite flow law File content File format File name File size grain-size sensitive creep Greenland ice ICEDRILL Ice drill NEEM North Greenland Eemian Ice Drilling strain rate predictions Uniform resource locator/link to file 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 File content File format File name File size grain-size sensitive creep Greenland ice ICEDRILL Ice drill NEEM North Greenland Eemian Ice Drilling strain rate predictions Uniform resource locator/link to file |
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. See also interpretations in publication (Kuiper et al. 2020 TC). |
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://doi.pangaea.de/10.1594/PANGAEA.920005 https://doi.org/10.1594/PANGAEA.920005 |
op_coverage |
LATITUDE: 77.450000 * LONGITUDE: -51.060000 * DATE/TIME START: 2009-05-01T00:00:00 * DATE/TIME END: 2009-08-20T00:00:00 * MINIMUM ELEVATION: 2545.0 m * MAXIMUM ELEVATION: 2545.0 m |
long_lat |
ENVELOPE(-51.060000,-51.060000,77.450000,77.450000) |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core North Greenland The Cryosphere |
genre_facet |
Greenland ice core North Greenland The Cryosphere |
op_relation |
Kipfstuhl, Sepp (2010): Large area scan macroscope images from the NEEM ice core. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.743296 Kuiper, Ernst-Jan N; de Bresser, Johannes H P; Drury, Martyn R; Eichler, Jan; Pennock, Gillian M; Weikusat, Ilka (2020): Using a composite flow law to model deformation in the NEEM deep ice core, Greenland: Part 2 the role of grain size and premelting on ice deformation at high homologous temperature. The Cryosphere, https://doi.org/10.5194/tc-2018-275 Kuiper, Ernst-Jan N; Weikusat, Ilka; de Bresser, Johannes H P; Jansen, Daniela; Pennock, Gillian M; Drury, Martyn R (2020): Using a composite flow law to model deformation in the NEEM deep ice core, Greenland: Part 1 the role of grain size and grain size distribution on the deformation of Holocene and glacial ice. The Cryosphere, https://doi.org/10.5194/tc-2018-274 Weikusat, Ilka; Binder, Tobias; Kipfstuhl, Sepp (2020): Structural grain parameters from image analysis of large area scan macroscope images from the NEEM ice core. PANGAEA, https://doi.org/10.1594/PANGAEA.919775 Binder, Tobias (2014): Measurements of grain boundary networks in deep polar ice cores - A digital image processing approach. Heidelberg University Library, Dissertation, https://doi.org/10.11588/heidok.00016891 Binder, Tobias; Garbe, Christoph S; Wagenbach, Dietmar; Freitag, Johannes; Kipfstuhl, Sepp (2013): Extraction and parametrization of grain boundary networks in glacier ice, using a dedicated method of automatic image analysis. Journal of Microscopy, 250(2), 130-141, https://doi.org/10.1111/jmi.12029 Binder, Tobias; Weikusat, Ilka; Freitag, Johannes; Garbe, Christoph S; Wagenbach, Dietmar; Kipfstuhl, Sepp (2013): Microstructure through an Ice Sheet. Materials Science Forum, 753, 481-484, https://doi.org/10.4028/www.scientific.net/MSF.753.481 Goldsby, David; Kohlstedt, David (1997): Grain boundary sliding in fine-grained Ice I. Scripta Materialia, 37(9), 1399-1406, https://doi.org/10.1016/S1359-6462(97)00246-7 Goldsby, David; Kohlstedt, David (2001): Superplastic deformation of ice: Experimental observations. Journal of Geophysical Research: Solid Earth, 106(B6), 11017-11030, https://doi.org/10.1029/2000JB900336 https://doi.pangaea.de/10.1594/PANGAEA.920005 https://doi.org/10.1594/PANGAEA.920005 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.920005 https://doi.org/10.5194/tc-2018-275 https://doi.org/10.5194/tc-2018-274 https://doi.org/10.1594/PANGAEA.919775 https://doi.org/10.11588/heidok.00016891 https://doi.org/10.1111/jmi.12029 https://doi.org/10 |
_version_ |
1766015768578752512 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.920005 2023-05-15T16:26:47+02:00 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 LATITUDE: 77.450000 * LONGITUDE: -51.060000 * DATE/TIME START: 2009-05-01T00:00:00 * DATE/TIME END: 2009-08-20T00:00:00 * MINIMUM ELEVATION: 2545.0 m * MAXIMUM ELEVATION: 2545.0 m 2020-07-09 text/tab-separated-values, 10 data points https://doi.pangaea.de/10.1594/PANGAEA.920005 https://doi.org/10.1594/PANGAEA.920005 en eng PANGAEA Kipfstuhl, Sepp (2010): Large area scan macroscope images from the NEEM ice core. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.743296 Kuiper, Ernst-Jan N; de Bresser, Johannes H P; Drury, Martyn R; Eichler, Jan; Pennock, Gillian M; Weikusat, Ilka (2020): Using a composite flow law to model deformation in the NEEM deep ice core, Greenland: Part 2 the role of grain size and premelting on ice deformation at high homologous temperature. The Cryosphere, https://doi.org/10.5194/tc-2018-275 Kuiper, Ernst-Jan N; Weikusat, Ilka; de Bresser, Johannes H P; Jansen, Daniela; Pennock, Gillian M; Drury, Martyn R (2020): Using a composite flow law to model deformation in the NEEM deep ice core, Greenland: Part 1 the role of grain size and grain size distribution on the deformation of Holocene and glacial ice. The Cryosphere, https://doi.org/10.5194/tc-2018-274 Weikusat, Ilka; Binder, Tobias; Kipfstuhl, Sepp (2020): Structural grain parameters from image analysis of large area scan macroscope images from the NEEM ice core. PANGAEA, https://doi.org/10.1594/PANGAEA.919775 Binder, Tobias (2014): Measurements of grain boundary networks in deep polar ice cores - A digital image processing approach. Heidelberg University Library, Dissertation, https://doi.org/10.11588/heidok.00016891 Binder, Tobias; Garbe, Christoph S; Wagenbach, Dietmar; Freitag, Johannes; Kipfstuhl, Sepp (2013): Extraction and parametrization of grain boundary networks in glacier ice, using a dedicated method of automatic image analysis. Journal of Microscopy, 250(2), 130-141, https://doi.org/10.1111/jmi.12029 Binder, Tobias; Weikusat, Ilka; Freitag, Johannes; Garbe, Christoph S; Wagenbach, Dietmar; Kipfstuhl, Sepp (2013): Microstructure through an Ice Sheet. Materials Science Forum, 753, 481-484, https://doi.org/10.4028/www.scientific.net/MSF.753.481 Goldsby, David; Kohlstedt, David (1997): Grain boundary sliding in fine-grained Ice I. Scripta Materialia, 37(9), 1399-1406, https://doi.org/10.1016/S1359-6462(97)00246-7 Goldsby, David; Kohlstedt, David (2001): Superplastic deformation of ice: Experimental observations. Journal of Geophysical Research: Solid Earth, 106(B6), 11017-11030, https://doi.org/10.1029/2000JB900336 https://doi.pangaea.de/10.1594/PANGAEA.920005 https://doi.org/10.1594/PANGAEA.920005 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY composite flow law File content File format File name File size grain-size sensitive creep Greenland ice ICEDRILL Ice drill NEEM North Greenland Eemian Ice Drilling strain rate predictions Uniform resource locator/link to file Dataset 2020 ftpangaea https://doi.org/10.1594/PANGAEA.920005 https://doi.org/10.5194/tc-2018-275 https://doi.org/10.5194/tc-2018-274 https://doi.org/10.1594/PANGAEA.919775 https://doi.org/10.11588/heidok.00016891 https://doi.org/10.1111/jmi.12029 https://doi.org/10 2023-01-20T09:13:47Z 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. See also interpretations in publication (Kuiper et al. 2020 TC). Dataset Greenland ice core North Greenland The Cryosphere PANGAEA - Data Publisher for Earth & Environmental Science Greenland ENVELOPE(-51.060000,-51.060000,77.450000,77.450000) |