A glimpse beneath Antarctic sea ice : Platelet layer volume from multifrequency electromagnetic induction sounding
In Antarctica, ice crystals emerge from ice-shelf cavities and accumulate in unconsolidated layers beneath nearby sea ice. Such sub-ice platelet layers form a unique habitat, and serve as an indicator for the state of an ice shelf. However, the lack of a suitable methodology impedes an efficient qua...
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Uppsala universitet, Geofysik
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ftuppsalauniv:oai:DiVA.org:uu-270273 2023-05-15T14:01:38+02:00 A glimpse beneath Antarctic sea ice : Platelet layer volume from multifrequency electromagnetic induction sounding Hunkeler, Priska A. Hoppmann, Mario Hendricks, Stefan Kalscheuer, Thomas Gerdes, Ruediger 2016 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-270273 https://doi.org/10.1002/2015GL065074 eng eng Uppsala universitet, Geofysik Geophysical Research Letters, 0094-8276, 2016, 43:1, s. 222-231 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-270273 doi:10.1002/2015GL065074 ISI:000369014100027 info:eu-repo/semantics/openAccess Geophysics Geofysik Article in journal info:eu-repo/semantics/article text 2016 ftuppsalauniv https://doi.org/10.1002/2015GL065074 2023-02-23T21:40:34Z In Antarctica, ice crystals emerge from ice-shelf cavities and accumulate in unconsolidated layers beneath nearby sea ice. Such sub-ice platelet layers form a unique habitat, and serve as an indicator for the state of an ice shelf. However, the lack of a suitable methodology impedes an efficient quantification of this phenomenon on scales beyond point measurements. In this study, we inverted multi-frequency electromagnetic (EM) induction soundings of > 100 km length, obtained on fast ice with an underlying platelet layer in the eastern Weddell Sea. EM-derived platelet-layer thickness and conductivity are consistent with other field observations. Our results further suggest that platelet-layer volume is higher than previously thought in this region, and that platelet-layer ice-volume fraction is proportional to its thickness. We conclude that multi-frequency EM is a suitable tool to determine platelet-layer volume, with the potential to obtain crucial knowledge of associated processes in otherwise inaccessible ice-shelf cavities. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Sea ice Weddell Sea Uppsala University: Publications (DiVA) Antarctic Weddell Weddell Sea Geophysical Research Letters 43 1 222 231 |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Geophysics Geofysik |
spellingShingle |
Geophysics Geofysik Hunkeler, Priska A. Hoppmann, Mario Hendricks, Stefan Kalscheuer, Thomas Gerdes, Ruediger A glimpse beneath Antarctic sea ice : Platelet layer volume from multifrequency electromagnetic induction sounding |
topic_facet |
Geophysics Geofysik |
description |
In Antarctica, ice crystals emerge from ice-shelf cavities and accumulate in unconsolidated layers beneath nearby sea ice. Such sub-ice platelet layers form a unique habitat, and serve as an indicator for the state of an ice shelf. However, the lack of a suitable methodology impedes an efficient quantification of this phenomenon on scales beyond point measurements. In this study, we inverted multi-frequency electromagnetic (EM) induction soundings of > 100 km length, obtained on fast ice with an underlying platelet layer in the eastern Weddell Sea. EM-derived platelet-layer thickness and conductivity are consistent with other field observations. Our results further suggest that platelet-layer volume is higher than previously thought in this region, and that platelet-layer ice-volume fraction is proportional to its thickness. We conclude that multi-frequency EM is a suitable tool to determine platelet-layer volume, with the potential to obtain crucial knowledge of associated processes in otherwise inaccessible ice-shelf cavities. |
format |
Article in Journal/Newspaper |
author |
Hunkeler, Priska A. Hoppmann, Mario Hendricks, Stefan Kalscheuer, Thomas Gerdes, Ruediger |
author_facet |
Hunkeler, Priska A. Hoppmann, Mario Hendricks, Stefan Kalscheuer, Thomas Gerdes, Ruediger |
author_sort |
Hunkeler, Priska A. |
title |
A glimpse beneath Antarctic sea ice : Platelet layer volume from multifrequency electromagnetic induction sounding |
title_short |
A glimpse beneath Antarctic sea ice : Platelet layer volume from multifrequency electromagnetic induction sounding |
title_full |
A glimpse beneath Antarctic sea ice : Platelet layer volume from multifrequency electromagnetic induction sounding |
title_fullStr |
A glimpse beneath Antarctic sea ice : Platelet layer volume from multifrequency electromagnetic induction sounding |
title_full_unstemmed |
A glimpse beneath Antarctic sea ice : Platelet layer volume from multifrequency electromagnetic induction sounding |
title_sort |
glimpse beneath antarctic sea ice : platelet layer volume from multifrequency electromagnetic induction sounding |
publisher |
Uppsala universitet, Geofysik |
publishDate |
2016 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-270273 https://doi.org/10.1002/2015GL065074 |
geographic |
Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica Ice Shelf Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Sea ice Weddell Sea |
op_relation |
Geophysical Research Letters, 0094-8276, 2016, 43:1, s. 222-231 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-270273 doi:10.1002/2015GL065074 ISI:000369014100027 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2015GL065074 |
container_title |
Geophysical Research Letters |
container_volume |
43 |
container_issue |
1 |
container_start_page |
222 |
op_container_end_page |
231 |
_version_ |
1766271599685664768 |