Photograph of the month
Microstructure of deep polar ice. The image shows ice from the lower, warm part of the EPICA-Dronning Maud Land (EDML) core in the Antarctic ice sheet. At a depth of 2375 m, the ca. 130.000 years old ice is at �13 �C (Ruth et al., 2007; Wilhelms et al., 2007), i.e. a homologous temperature of 0.952....
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2014
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Online Access: | https://epic.awi.de/id/eprint/35375/ https://epic.awi.de/id/eprint/35375/1/Weikusat2014_acc.pdf http://www.sciencedirect.com/science/article/pii/S0191814114000054 https://hdl.handle.net/10013/epic.43458 https://hdl.handle.net/10013/epic.43458.d001 |
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ftawi:oai:epic.awi.de:35375 2023-05-15T13:40:26+02:00 Photograph of the month Weikusat, Ilka 2014-04 application/pdf https://epic.awi.de/id/eprint/35375/ https://epic.awi.de/id/eprint/35375/1/Weikusat2014_acc.pdf http://www.sciencedirect.com/science/article/pii/S0191814114000054 https://hdl.handle.net/10013/epic.43458 https://hdl.handle.net/10013/epic.43458.d001 unknown PERGAMON-ELSEVIER SCIENCE LTD https://epic.awi.de/id/eprint/35375/1/Weikusat2014_acc.pdf https://hdl.handle.net/10013/epic.43458.d001 Weikusat, I. orcid:0000-0002-3023-6036 (2014) Photograph of the month , Journal of Structural Geology, 61 , p. 143 . doi:10.1016/j.jsg.2014.01.004 <https://doi.org/10.1016/j.jsg.2014.01.004> , hdl:10013/epic.43458 EPIC3Journal of Structural Geology, PERGAMON-ELSEVIER SCIENCE LTD, 61, pp. 143-143, ISSN: 0191-8141 Article isiRev 2014 ftawi https://doi.org/10.1016/j.jsg.2014.01.004 2021-12-24T15:39:29Z Microstructure of deep polar ice. The image shows ice from the lower, warm part of the EPICA-Dronning Maud Land (EDML) core in the Antarctic ice sheet. At a depth of 2375 m, the ca. 130.000 years old ice is at �13 �C (Ruth et al., 2007; Wilhelms et al., 2007), i.e. a homologous temperature of 0.952. Polar ice is thus a “hot material” with microstructural behaviour close to that of silicate minerals at high metamorphic grades. The image shows the c-axes distribution map (AVA) measured with the automatic fabric analyzer (G50) by Russell-Head Instruments (www.russellheadinstruments.com) (see also Wilson et al. 2014; Peternell et al. 2014; Faria et al., 2014a). Colour coding is according to c-axis orientation. Strong dynamic recrystallization is indicated by interlocking grains and orientation families: the bright purple grains may belong to a single grain with a highly irregular shape, making it appear as multiple grains due to sectioning effects (Urai et al., 1986). The important role of dynamic recrystallization in all depths of the polar ice sheets (homologous temperatures at the cold surface ca. 0.8) lead to the development of the new recrystallization diagram presented in this issue (Faria et al. 2014b). The image is a collage of 36 individual orientation maps. Photograph: Ilka Weikusat & Sepp Kipfstuhl Article in Journal/Newspaper Antarc* Antarctic Dronning Maud Land EPICA Ice Sheet Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Dronning Maud Land The Antarctic Journal of Structural Geology 61 143 |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Microstructure of deep polar ice. The image shows ice from the lower, warm part of the EPICA-Dronning Maud Land (EDML) core in the Antarctic ice sheet. At a depth of 2375 m, the ca. 130.000 years old ice is at �13 �C (Ruth et al., 2007; Wilhelms et al., 2007), i.e. a homologous temperature of 0.952. Polar ice is thus a “hot material” with microstructural behaviour close to that of silicate minerals at high metamorphic grades. The image shows the c-axes distribution map (AVA) measured with the automatic fabric analyzer (G50) by Russell-Head Instruments (www.russellheadinstruments.com) (see also Wilson et al. 2014; Peternell et al. 2014; Faria et al., 2014a). Colour coding is according to c-axis orientation. Strong dynamic recrystallization is indicated by interlocking grains and orientation families: the bright purple grains may belong to a single grain with a highly irregular shape, making it appear as multiple grains due to sectioning effects (Urai et al., 1986). The important role of dynamic recrystallization in all depths of the polar ice sheets (homologous temperatures at the cold surface ca. 0.8) lead to the development of the new recrystallization diagram presented in this issue (Faria et al. 2014b). The image is a collage of 36 individual orientation maps. Photograph: Ilka Weikusat & Sepp Kipfstuhl |
format |
Article in Journal/Newspaper |
author |
Weikusat, Ilka |
spellingShingle |
Weikusat, Ilka Photograph of the month |
author_facet |
Weikusat, Ilka |
author_sort |
Weikusat, Ilka |
title |
Photograph of the month |
title_short |
Photograph of the month |
title_full |
Photograph of the month |
title_fullStr |
Photograph of the month |
title_full_unstemmed |
Photograph of the month |
title_sort |
photograph of the month |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/35375/ https://epic.awi.de/id/eprint/35375/1/Weikusat2014_acc.pdf http://www.sciencedirect.com/science/article/pii/S0191814114000054 https://hdl.handle.net/10013/epic.43458 https://hdl.handle.net/10013/epic.43458.d001 |
geographic |
Antarctic Dronning Maud Land The Antarctic |
geographic_facet |
Antarctic Dronning Maud Land The Antarctic |
genre |
Antarc* Antarctic Dronning Maud Land EPICA Ice Sheet |
genre_facet |
Antarc* Antarctic Dronning Maud Land EPICA Ice Sheet |
op_source |
EPIC3Journal of Structural Geology, PERGAMON-ELSEVIER SCIENCE LTD, 61, pp. 143-143, ISSN: 0191-8141 |
op_relation |
https://epic.awi.de/id/eprint/35375/1/Weikusat2014_acc.pdf https://hdl.handle.net/10013/epic.43458.d001 Weikusat, I. orcid:0000-0002-3023-6036 (2014) Photograph of the month , Journal of Structural Geology, 61 , p. 143 . doi:10.1016/j.jsg.2014.01.004 <https://doi.org/10.1016/j.jsg.2014.01.004> , hdl:10013/epic.43458 |
op_doi |
https://doi.org/10.1016/j.jsg.2014.01.004 |
container_title |
Journal of Structural Geology |
container_volume |
61 |
container_start_page |
143 |
_version_ |
1766133947121532928 |