No Cover Image

Journal article 235 views 45 downloads

Imaging Brine Infiltration and Basal Marine Ice in Larsen C Ice Shelf, Antarctic Peninsula, From Borehole Measurements and Transient Electromagnetics

Siobhan Killingbeck, Bernd Kulessa Orcid Logo, Katie E. Miles Orcid Logo, Bryn Hubbard Orcid Logo, Adrian Luckman Orcid Logo, Sarah S. Thompson Orcid Logo, Glenn Jones, Benjamin K. Galton‐Fenzi

Geophysical Research Letters, Volume: 52, Issue: 17

Swansea University Authors: Siobhan Killingbeck, Bernd Kulessa Orcid Logo, Adrian Luckman Orcid Logo

  • 70133.VoR.pdf

    PDF | Version of Record

    © 2025. The Author(s). This is an open access article under the terms of the Creative Commons Attribution License.

    Download (3.19MB)

Check full text

DOI (Published version): 10.1029/2025gl115908

Abstract

The presence and nature of marine ice in ice shelves is important, yet difficult to determine. We present transient electromagnetic results spanning 10 km across a suture zone of Larsen C Ice Shelf (LCIS), Antarctica, supported by central borehole measurements. Our results indicate the presence of t...

Full description

Published in: Geophysical Research Letters
ISSN: 0094-8276 1944-8007
Published: American Geophysical Union (AGU) 2025
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa70133
first_indexed 2025-08-08T09:31:48Z
last_indexed 2025-09-19T14:49:14Z
id cronfa70133
recordtype SURis
fullrecord <?xml version="1.0"?><rfc1807><datestamp>2025-09-18T13:36:58.3651530</datestamp><bib-version>v2</bib-version><id>70133</id><entry>2025-08-08</entry><title>Imaging Brine Infiltration and Basal Marine Ice in Larsen C Ice Shelf, Antarctic Peninsula, From Borehole Measurements and Transient Electromagnetics</title><swanseaauthors><author><sid>3e5a31e07fc86aa48b42ae5995567205</sid><firstname>Siobhan</firstname><surname>Killingbeck</surname><name>Siobhan Killingbeck</name><active>true</active><ethesisStudent>false</ethesisStudent></author><author><sid>52acda616e9f6073cbebf497def874c9</sid><ORCID>0000-0002-4830-4949</ORCID><firstname>Bernd</firstname><surname>Kulessa</surname><name>Bernd Kulessa</name><active>true</active><ethesisStudent>false</ethesisStudent></author><author><sid>008cb668b2671b653a88677f075799a9</sid><ORCID>0000-0002-9618-5905</ORCID><firstname>Adrian</firstname><surname>Luckman</surname><name>Adrian Luckman</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2025-08-08</date><deptcode>BGPS</deptcode><abstract>The presence and nature of marine ice in ice shelves is important, yet difficult to determine. We present transient electromagnetic results spanning 10 km across a suture zone of Larsen C Ice Shelf (LCIS), Antarctica, supported by central borehole measurements. Our results indicate the presence of two ice-shelf layers. The uppermost layer, &#x223C;300 m thick, has resistivity 103&#x2212;106 &#x3A9;m. We interpret this as meteoric ice, overlying a lower shelf layer 25&#x2013;56 m thick with resistivity 3&#x2013;20 &#x3A9;m, consistent with permeable basal marine ice. This reconstruction closely matches modeled marine-ice thicknesses in the area. The porosity of this layer is 0.18&#x2013;0.40, higher than measured farther down-flow, suggesting the layer consolidates once formed. Within the upper layer at 78.5 m depth, we identify a 2.5 m thick layer, likely linked to brine infiltration. These heterogeneities in ice shelf properties should be accounted for in future LCIS stability assessments.</abstract><type>Journal Article</type><journal>Geophysical Research Letters</journal><volume>52</volume><journalNumber>17</journalNumber><paginationStart/><paginationEnd/><publisher>American Geophysical Union (AGU)</publisher><placeOfPublication/><isbnPrint/><isbnElectronic/><issnPrint>0094-8276</issnPrint><issnElectronic>1944-8007</issnElectronic><keywords/><publishedDay>2</publishedDay><publishedMonth>7</publishedMonth><publishedYear>2025</publishedYear><publishedDate>2025-07-02</publishedDate><doi>10.1029/2025gl115908</doi><url/><notes/><college>COLLEGE NANME</college><department>Biosciences Geography and Physics School</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>BGPS</DepartmentCode><institution>Swansea University</institution><apcterm>SU Library paid the OA fee (TA Institutional Deal)</apcterm><funders>NERC (Grant Number: NE/T008016/1)</funders><projectreference/><lastEdited>2025-09-18T13:36:58.3651530</lastEdited><Created>2025-08-08T10:25:47.3290771</Created><path><level id="1">Faculty of Science and Engineering</level><level id="2">School of Biosciences, Geography and Physics - Geography</level></path><authors><author><firstname>Siobhan</firstname><surname>Killingbeck</surname><order>1</order></author><author><firstname>Bernd</firstname><surname>Kulessa</surname><orcid>0000-0002-4830-4949</orcid><order>2</order></author><author><firstname>Katie E.</firstname><surname>Miles</surname><orcid>0000-0003-2793-9766</orcid><order>3</order></author><author><firstname>Bryn</firstname><surname>Hubbard</surname><orcid>0000-0002-3565-3875</orcid><order>4</order></author><author><firstname>Adrian</firstname><surname>Luckman</surname><orcid>0000-0002-9618-5905</orcid><order>5</order></author><author><firstname>Sarah S.</firstname><surname>Thompson</surname><orcid>0000-0001-9112-6933</orcid><order>6</order></author><author><firstname>Glenn</firstname><surname>Jones</surname><order>7</order></author><author><firstname>Benjamin K.</firstname><surname>Galton&#x2010;Fenzi</surname><order>8</order></author></authors><documents><document><filename>70133__35131__d19b08766d6a430f9892c2bc3d4315d2.pdf</filename><originalFilename>70133.VoR.pdf</originalFilename><uploaded>2025-09-18T13:30:40.8228937</uploaded><type>Output</type><contentLength>3342389</contentLength><contentType>application/pdf</contentType><version>Version of Record</version><cronfaStatus>true</cronfaStatus><documentNotes>&#xA9; 2025. The Author(s). This is an open access article under the terms of the Creative Commons Attribution License.</documentNotes><copyrightCorrect>true</copyrightCorrect><language>eng</language><licence>http://creativecommons.org/licenses/by/4.0/</licence></document></documents><OutputDurs/></rfc1807>
spelling 2025-09-18T13:36:58.3651530 v2 70133 2025-08-08 Imaging Brine Infiltration and Basal Marine Ice in Larsen C Ice Shelf, Antarctic Peninsula, From Borehole Measurements and Transient Electromagnetics 3e5a31e07fc86aa48b42ae5995567205 Siobhan Killingbeck Siobhan Killingbeck true false 52acda616e9f6073cbebf497def874c9 0000-0002-4830-4949 Bernd Kulessa Bernd Kulessa true false 008cb668b2671b653a88677f075799a9 0000-0002-9618-5905 Adrian Luckman Adrian Luckman true false 2025-08-08 BGPS The presence and nature of marine ice in ice shelves is important, yet difficult to determine. We present transient electromagnetic results spanning 10 km across a suture zone of Larsen C Ice Shelf (LCIS), Antarctica, supported by central borehole measurements. Our results indicate the presence of two ice-shelf layers. The uppermost layer, ∼300 m thick, has resistivity 103−106 Ωm. We interpret this as meteoric ice, overlying a lower shelf layer 25–56 m thick with resistivity 3–20 Ωm, consistent with permeable basal marine ice. This reconstruction closely matches modeled marine-ice thicknesses in the area. The porosity of this layer is 0.18–0.40, higher than measured farther down-flow, suggesting the layer consolidates once formed. Within the upper layer at 78.5 m depth, we identify a 2.5 m thick layer, likely linked to brine infiltration. These heterogeneities in ice shelf properties should be accounted for in future LCIS stability assessments. Journal Article Geophysical Research Letters 52 17 American Geophysical Union (AGU) 0094-8276 1944-8007 2 7 2025 2025-07-02 10.1029/2025gl115908 COLLEGE NANME Biosciences Geography and Physics School COLLEGE CODE BGPS Swansea University SU Library paid the OA fee (TA Institutional Deal) NERC (Grant Number: NE/T008016/1) 2025-09-18T13:36:58.3651530 2025-08-08T10:25:47.3290771 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Geography Siobhan Killingbeck 1 Bernd Kulessa 0000-0002-4830-4949 2 Katie E. Miles 0000-0003-2793-9766 3 Bryn Hubbard 0000-0002-3565-3875 4 Adrian Luckman 0000-0002-9618-5905 5 Sarah S. Thompson 0000-0001-9112-6933 6 Glenn Jones 7 Benjamin K. Galton‐Fenzi 8 70133__35131__d19b08766d6a430f9892c2bc3d4315d2.pdf 70133.VoR.pdf 2025-09-18T13:30:40.8228937 Output 3342389 application/pdf Version of Record true © 2025. The Author(s). This is an open access article under the terms of the Creative Commons Attribution License. true eng http://creativecommons.org/licenses/by/4.0/
title Imaging Brine Infiltration and Basal Marine Ice in Larsen C Ice Shelf, Antarctic Peninsula, From Borehole Measurements and Transient Electromagnetics
spellingShingle Imaging Brine Infiltration and Basal Marine Ice in Larsen C Ice Shelf, Antarctic Peninsula, From Borehole Measurements and Transient Electromagnetics
Siobhan Killingbeck
Bernd Kulessa
Adrian Luckman
title_short Imaging Brine Infiltration and Basal Marine Ice in Larsen C Ice Shelf, Antarctic Peninsula, From Borehole Measurements and Transient Electromagnetics
title_full Imaging Brine Infiltration and Basal Marine Ice in Larsen C Ice Shelf, Antarctic Peninsula, From Borehole Measurements and Transient Electromagnetics
title_fullStr Imaging Brine Infiltration and Basal Marine Ice in Larsen C Ice Shelf, Antarctic Peninsula, From Borehole Measurements and Transient Electromagnetics
title_full_unstemmed Imaging Brine Infiltration and Basal Marine Ice in Larsen C Ice Shelf, Antarctic Peninsula, From Borehole Measurements and Transient Electromagnetics
title_sort Imaging Brine Infiltration and Basal Marine Ice in Larsen C Ice Shelf, Antarctic Peninsula, From Borehole Measurements and Transient Electromagnetics
author_id_str_mv 3e5a31e07fc86aa48b42ae5995567205
52acda616e9f6073cbebf497def874c9
008cb668b2671b653a88677f075799a9
author_id_fullname_str_mv 3e5a31e07fc86aa48b42ae5995567205_***_Siobhan Killingbeck
52acda616e9f6073cbebf497def874c9_***_Bernd Kulessa
008cb668b2671b653a88677f075799a9_***_Adrian Luckman
author Siobhan Killingbeck
Bernd Kulessa
Adrian Luckman
author2 Siobhan Killingbeck
Bernd Kulessa
Katie E. Miles
Bryn Hubbard
Adrian Luckman
Sarah S. Thompson
Glenn Jones
Benjamin K. Galton‐Fenzi
format Journal article
container_title Geophysical Research Letters
container_volume 52
container_issue 17
publishDate 2025
institution Swansea University
issn 0094-8276
1944-8007
doi_str_mv 10.1029/2025gl115908
publisher American Geophysical Union (AGU)
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Geography{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Geography
document_store_str 1
active_str 0
description The presence and nature of marine ice in ice shelves is important, yet difficult to determine. We present transient electromagnetic results spanning 10 km across a suture zone of Larsen C Ice Shelf (LCIS), Antarctica, supported by central borehole measurements. Our results indicate the presence of two ice-shelf layers. The uppermost layer, ∼300 m thick, has resistivity 103−106 Ωm. We interpret this as meteoric ice, overlying a lower shelf layer 25–56 m thick with resistivity 3–20 Ωm, consistent with permeable basal marine ice. This reconstruction closely matches modeled marine-ice thicknesses in the area. The porosity of this layer is 0.18–0.40, higher than measured farther down-flow, suggesting the layer consolidates once formed. Within the upper layer at 78.5 m depth, we identify a 2.5 m thick layer, likely linked to brine infiltration. These heterogeneities in ice shelf properties should be accounted for in future LCIS stability assessments.
published_date 2025-07-02T05:30:03Z
_version_ 1851097983287820288
score 11.089551

Similar Items