Physical properties of ice sheets implications for, and findings from deep ice core drilling
The cutting and flow properties of ice depend strongly on its physical properties, as e.g. crystallite size, shape and fabrics. As the crystallites properties depend on the geochemical impurity and dust load, as well as the ice flow, and thus vary with depth,the cutting behaviour when drilling an ic...
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ftawi:oai:epic.awi.de:15766 2024-09-15T17:41:11+00:00 Physical properties of ice sheets implications for, and findings from deep ice core drilling Wilhelms, Frank Kipfstuhl, Sepp Faria, S. H. Hamann, Ilka Dahl-Jensen, D. Sheldon, S. G. Oerter, Hans Miller, Heinrich 2006 https://epic.awi.de/id/eprint/15766/ https://hdl.handle.net/10013/epic.25846 unknown Wilhelms, F. orcid:0000-0001-7688-3135 , Kipfstuhl, S. , Faria, S. H. , Hamann, I. orcid:0000-0002-3023-6036 , Dahl-Jensen, D. , Sheldon, S. G. , Oerter, H. and Miller, H. (2006) Physical properties of ice sheets implications for, and findings from deep ice core drilling , 11th International Conference on the Physics and Chemistry of Ice PCI 2006 Bremerhaven, Germany, July 23rd28th . hdl:10013/epic.25846 EPIC311th International Conference on the Physics and Chemistry of Ice PCI 2006 Bremerhaven, Germany, July 23rd28th, 2006 p. Conference notRev 2006 ftawi 2024-06-24T03:59:21Z The cutting and flow properties of ice depend strongly on its physical properties, as e.g. crystallite size, shape and fabrics. As the crystallites properties depend on the geochemical impurity and dust load, as well as the ice flow, and thus vary with depth,the cutting behaviour when drilling an ice core will change with depth. We are at the beginning of systematic tests and we will present first qualitative observations and links between cutting size, core production, and ice properties.The EPICA (European Project for Ice Coring in Antarctica) borehole in DML (Dronning Maud Land, Antarctica) was under-balanced by about three bars its bottom over two years. We found that the borehole closure strongly correlates with the crystallite size record as observed in the ice core. We will discuss this as an illustrative example and suggest to leave bore holes slightly under-balanced for a while to determine the flow properties of ice sheet directly from borehole closure. Conference Object Antarc* Antarctica DML Dronning Maud Land EPICA ice core Ice Sheet Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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The cutting and flow properties of ice depend strongly on its physical properties, as e.g. crystallite size, shape and fabrics. As the crystallites properties depend on the geochemical impurity and dust load, as well as the ice flow, and thus vary with depth,the cutting behaviour when drilling an ice core will change with depth. We are at the beginning of systematic tests and we will present first qualitative observations and links between cutting size, core production, and ice properties.The EPICA (European Project for Ice Coring in Antarctica) borehole in DML (Dronning Maud Land, Antarctica) was under-balanced by about three bars its bottom over two years. We found that the borehole closure strongly correlates with the crystallite size record as observed in the ice core. We will discuss this as an illustrative example and suggest to leave bore holes slightly under-balanced for a while to determine the flow properties of ice sheet directly from borehole closure. |
format |
Conference Object |
author |
Wilhelms, Frank Kipfstuhl, Sepp Faria, S. H. Hamann, Ilka Dahl-Jensen, D. Sheldon, S. G. Oerter, Hans Miller, Heinrich |
spellingShingle |
Wilhelms, Frank Kipfstuhl, Sepp Faria, S. H. Hamann, Ilka Dahl-Jensen, D. Sheldon, S. G. Oerter, Hans Miller, Heinrich Physical properties of ice sheets implications for, and findings from deep ice core drilling |
author_facet |
Wilhelms, Frank Kipfstuhl, Sepp Faria, S. H. Hamann, Ilka Dahl-Jensen, D. Sheldon, S. G. Oerter, Hans Miller, Heinrich |
author_sort |
Wilhelms, Frank |
title |
Physical properties of ice sheets implications for, and findings from deep ice core drilling |
title_short |
Physical properties of ice sheets implications for, and findings from deep ice core drilling |
title_full |
Physical properties of ice sheets implications for, and findings from deep ice core drilling |
title_fullStr |
Physical properties of ice sheets implications for, and findings from deep ice core drilling |
title_full_unstemmed |
Physical properties of ice sheets implications for, and findings from deep ice core drilling |
title_sort |
physical properties of ice sheets implications for, and findings from deep ice core drilling |
publishDate |
2006 |
url |
https://epic.awi.de/id/eprint/15766/ https://hdl.handle.net/10013/epic.25846 |
genre |
Antarc* Antarctica DML Dronning Maud Land EPICA ice core Ice Sheet |
genre_facet |
Antarc* Antarctica DML Dronning Maud Land EPICA ice core Ice Sheet |
op_source |
EPIC311th International Conference on the Physics and Chemistry of Ice PCI 2006 Bremerhaven, Germany, July 23rd28th, 2006 p. |
op_relation |
Wilhelms, F. orcid:0000-0001-7688-3135 , Kipfstuhl, S. , Faria, S. H. , Hamann, I. orcid:0000-0002-3023-6036 , Dahl-Jensen, D. , Sheldon, S. G. , Oerter, H. and Miller, H. (2006) Physical properties of ice sheets implications for, and findings from deep ice core drilling , 11th International Conference on the Physics and Chemistry of Ice PCI 2006 Bremerhaven, Germany, July 23rd28th . hdl:10013/epic.25846 |
_version_ |
1810487317699231744 |