Deep groundwater and potential subsurface habitats beneath an Antarctic dry valley
The occurrence of groundwater in Antarctica, particularly in the ice-free regions and along the coastal margins is poorly understood. Here we use an airborne transient electromagnetic (AEM) sensor to produce extensive imagery of resistivity beneath Taylor Valley. Regional-scale zones of low subsurfa...
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TRACE: Tennessee Research and Creative Exchange
2015
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ftunivtennknox:oai:trace.tennessee.edu:utk_micrpubs-1081 2023-05-15T13:41:47+02:00 Deep groundwater and potential subsurface habitats beneath an Antarctic dry valley Mikucki, Jill A. Auken, E. Tulaczyk, S. Virginia, R. A. Schamper, C. Sørensen, K. I. Doran, P. T. Dugan, H. Foley, N. 2015-04-28T07:00:00Z application/pdf https://trace.tennessee.edu/utk_micrpubs/79 https://trace.tennessee.edu/cgi/viewcontent.cgi?article=1081&context=utk_micrpubs unknown TRACE: Tennessee Research and Creative Exchange https://trace.tennessee.edu/utk_micrpubs/79 https://trace.tennessee.edu/cgi/viewcontent.cgi?article=1081&context=utk_micrpubs Microbiology Publications and Other Works airborne transient electromagnetic Antarctica Palaeoceanography Geophysics Microbial bioceanography Microbiology text 2015 ftunivtennknox 2022-03-02T20:33:57Z The occurrence of groundwater in Antarctica, particularly in the ice-free regions and along the coastal margins is poorly understood. Here we use an airborne transient electromagnetic (AEM) sensor to produce extensive imagery of resistivity beneath Taylor Valley. Regional-scale zones of low subsurface resistivity were detected that are inconsistent with the high resistivity of glacier ice or dry permafrost in this region. We interpret these results as an indication that liquid, with sufficiently high solute content, exists at temperatures well below freezing and considered within the range suitable for microbial life. These inferred brines are widespread within permafrost and extend below glaciers and lakes. One system emanates from below Taylor Glacier into Lake Bonney and a second system connects the ocean with the eastern 18 km of the valley. A connection between these two basins was not detected to the depth limitation of the AEM survey (∼350 m). Text Antarc* Antarctic Antarctica Ice permafrost Taylor Glacier University of Tennessee, Knoxville: Trace Antarctic Bonney ENVELOPE(162.417,162.417,-77.717,-77.717) Lake Bonney ENVELOPE(-25.588,-25.588,-80.361,-80.361) Taylor Glacier ENVELOPE(162.167,162.167,-77.733,-77.733) Taylor Valley ENVELOPE(163.000,163.000,-77.617,-77.617) |
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Open Polar |
collection |
University of Tennessee, Knoxville: Trace |
op_collection_id |
ftunivtennknox |
language |
unknown |
topic |
airborne transient electromagnetic Antarctica Palaeoceanography Geophysics Microbial bioceanography Microbiology |
spellingShingle |
airborne transient electromagnetic Antarctica Palaeoceanography Geophysics Microbial bioceanography Microbiology Mikucki, Jill A. Auken, E. Tulaczyk, S. Virginia, R. A. Schamper, C. Sørensen, K. I. Doran, P. T. Dugan, H. Foley, N. Deep groundwater and potential subsurface habitats beneath an Antarctic dry valley |
topic_facet |
airborne transient electromagnetic Antarctica Palaeoceanography Geophysics Microbial bioceanography Microbiology |
description |
The occurrence of groundwater in Antarctica, particularly in the ice-free regions and along the coastal margins is poorly understood. Here we use an airborne transient electromagnetic (AEM) sensor to produce extensive imagery of resistivity beneath Taylor Valley. Regional-scale zones of low subsurface resistivity were detected that are inconsistent with the high resistivity of glacier ice or dry permafrost in this region. We interpret these results as an indication that liquid, with sufficiently high solute content, exists at temperatures well below freezing and considered within the range suitable for microbial life. These inferred brines are widespread within permafrost and extend below glaciers and lakes. One system emanates from below Taylor Glacier into Lake Bonney and a second system connects the ocean with the eastern 18 km of the valley. A connection between these two basins was not detected to the depth limitation of the AEM survey (∼350 m). |
format |
Text |
author |
Mikucki, Jill A. Auken, E. Tulaczyk, S. Virginia, R. A. Schamper, C. Sørensen, K. I. Doran, P. T. Dugan, H. Foley, N. |
author_facet |
Mikucki, Jill A. Auken, E. Tulaczyk, S. Virginia, R. A. Schamper, C. Sørensen, K. I. Doran, P. T. Dugan, H. Foley, N. |
author_sort |
Mikucki, Jill A. |
title |
Deep groundwater and potential subsurface habitats beneath an Antarctic dry valley |
title_short |
Deep groundwater and potential subsurface habitats beneath an Antarctic dry valley |
title_full |
Deep groundwater and potential subsurface habitats beneath an Antarctic dry valley |
title_fullStr |
Deep groundwater and potential subsurface habitats beneath an Antarctic dry valley |
title_full_unstemmed |
Deep groundwater and potential subsurface habitats beneath an Antarctic dry valley |
title_sort |
deep groundwater and potential subsurface habitats beneath an antarctic dry valley |
publisher |
TRACE: Tennessee Research and Creative Exchange |
publishDate |
2015 |
url |
https://trace.tennessee.edu/utk_micrpubs/79 https://trace.tennessee.edu/cgi/viewcontent.cgi?article=1081&context=utk_micrpubs |
long_lat |
ENVELOPE(162.417,162.417,-77.717,-77.717) ENVELOPE(-25.588,-25.588,-80.361,-80.361) ENVELOPE(162.167,162.167,-77.733,-77.733) ENVELOPE(163.000,163.000,-77.617,-77.617) |
geographic |
Antarctic Bonney Lake Bonney Taylor Glacier Taylor Valley |
geographic_facet |
Antarctic Bonney Lake Bonney Taylor Glacier Taylor Valley |
genre |
Antarc* Antarctic Antarctica Ice permafrost Taylor Glacier |
genre_facet |
Antarc* Antarctic Antarctica Ice permafrost Taylor Glacier |
op_source |
Microbiology Publications and Other Works |
op_relation |
https://trace.tennessee.edu/utk_micrpubs/79 https://trace.tennessee.edu/cgi/viewcontent.cgi?article=1081&context=utk_micrpubs |
_version_ |
1766158052318248960 |