Subsurface imaging reveals a confined aquifer beneath an ice-sealed Antarctic lake
©2014. American Geophysical Union. All Rights Reserved. Liquid water oases are rare under extreme cold desert conditions found in the Antarctic McMurdo Dry Valleys. Here we report geophysical results that indicate that Lake Vida, one of the largest lakes in the region, is nearly frozen and underlain...
Published in: | Geophysical Research Letters |
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ftlouisianastuir:oai:digitalcommons.lsu.edu:geo_pubs-1609 2023-06-11T04:04:40+02:00 Subsurface imaging reveals a confined aquifer beneath an ice-sealed Antarctic lake Dugan, H. A. Doran, P. T. Tulaczyk, S. Mikucki, J. A. Arcone, S. A. Auken, E. Schamper, C. Virginia, R. A. 2015-01-16T08:00:00Z application/pdf https://digitalcommons.lsu.edu/geo_pubs/610 https://doi.org/10.1002/2014GL062431 https://digitalcommons.lsu.edu/context/geo_pubs/article/1609/viewcontent/610.pdf unknown LSU Digital Commons https://digitalcommons.lsu.edu/geo_pubs/610 doi:10.1002/2014GL062431 https://digitalcommons.lsu.edu/context/geo_pubs/article/1609/viewcontent/610.pdf Faculty Publications Antarctica electromagnetic methods frozen ground groundwater hydrology lakes permafrost text 2015 ftlouisianastuir https://doi.org/10.1002/2014GL062431 2023-05-28T18:24:40Z ©2014. American Geophysical Union. All Rights Reserved. Liquid water oases are rare under extreme cold desert conditions found in the Antarctic McMurdo Dry Valleys. Here we report geophysical results that indicate that Lake Vida, one of the largest lakes in the region, is nearly frozen and underlain by widespread cryoconcentrated brine. A ground penetrating radar survey profiled 20 m into lake ice and facilitated bathymetric mapping of the upper lake basin. An airborne transient electromagnetic survey revealed a low-resistivity zone 30-100 m beneath the lake surface. Based on previous knowledge of brine chemistry and local geology, we interpret this zone to be a confined aquifer situated in sediments with a porosity of 23-42%. Discovery of this aquifer suggests that subsurface liquid water may be more pervasive in regions of continuous permafrost than previously thought and may represent an extensive habitat for microbial populations. Key Points Geophysical survey finds low resistivities beneath a lake in Antarctic Dry Valleys Liquid brine abundant beneath Antarctic lake Aquifer provides microbial refugium in cold desert environment Text Antarc* Antarctic Antarctica Ice McMurdo Dry Valleys permafrost LSU Digital Commons (Louisiana State University) Antarctic Lake Vida ENVELOPE(161.950,161.950,-77.383,-77.383) McMurdo Dry Valleys The Antarctic Geophysical Research Letters 42 1 96 103 |
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collection |
LSU Digital Commons (Louisiana State University) |
op_collection_id |
ftlouisianastuir |
language |
unknown |
topic |
Antarctica electromagnetic methods frozen ground groundwater hydrology lakes permafrost |
spellingShingle |
Antarctica electromagnetic methods frozen ground groundwater hydrology lakes permafrost Dugan, H. A. Doran, P. T. Tulaczyk, S. Mikucki, J. A. Arcone, S. A. Auken, E. Schamper, C. Virginia, R. A. Subsurface imaging reveals a confined aquifer beneath an ice-sealed Antarctic lake |
topic_facet |
Antarctica electromagnetic methods frozen ground groundwater hydrology lakes permafrost |
description |
©2014. American Geophysical Union. All Rights Reserved. Liquid water oases are rare under extreme cold desert conditions found in the Antarctic McMurdo Dry Valleys. Here we report geophysical results that indicate that Lake Vida, one of the largest lakes in the region, is nearly frozen and underlain by widespread cryoconcentrated brine. A ground penetrating radar survey profiled 20 m into lake ice and facilitated bathymetric mapping of the upper lake basin. An airborne transient electromagnetic survey revealed a low-resistivity zone 30-100 m beneath the lake surface. Based on previous knowledge of brine chemistry and local geology, we interpret this zone to be a confined aquifer situated in sediments with a porosity of 23-42%. Discovery of this aquifer suggests that subsurface liquid water may be more pervasive in regions of continuous permafrost than previously thought and may represent an extensive habitat for microbial populations. Key Points Geophysical survey finds low resistivities beneath a lake in Antarctic Dry Valleys Liquid brine abundant beneath Antarctic lake Aquifer provides microbial refugium in cold desert environment |
format |
Text |
author |
Dugan, H. A. Doran, P. T. Tulaczyk, S. Mikucki, J. A. Arcone, S. A. Auken, E. Schamper, C. Virginia, R. A. |
author_facet |
Dugan, H. A. Doran, P. T. Tulaczyk, S. Mikucki, J. A. Arcone, S. A. Auken, E. Schamper, C. Virginia, R. A. |
author_sort |
Dugan, H. A. |
title |
Subsurface imaging reveals a confined aquifer beneath an ice-sealed Antarctic lake |
title_short |
Subsurface imaging reveals a confined aquifer beneath an ice-sealed Antarctic lake |
title_full |
Subsurface imaging reveals a confined aquifer beneath an ice-sealed Antarctic lake |
title_fullStr |
Subsurface imaging reveals a confined aquifer beneath an ice-sealed Antarctic lake |
title_full_unstemmed |
Subsurface imaging reveals a confined aquifer beneath an ice-sealed Antarctic lake |
title_sort |
subsurface imaging reveals a confined aquifer beneath an ice-sealed antarctic lake |
publisher |
LSU Digital Commons |
publishDate |
2015 |
url |
https://digitalcommons.lsu.edu/geo_pubs/610 https://doi.org/10.1002/2014GL062431 https://digitalcommons.lsu.edu/context/geo_pubs/article/1609/viewcontent/610.pdf |
long_lat |
ENVELOPE(161.950,161.950,-77.383,-77.383) |
geographic |
Antarctic Lake Vida McMurdo Dry Valleys The Antarctic |
geographic_facet |
Antarctic Lake Vida McMurdo Dry Valleys The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice McMurdo Dry Valleys permafrost |
genre_facet |
Antarc* Antarctic Antarctica Ice McMurdo Dry Valleys permafrost |
op_source |
Faculty Publications |
op_relation |
https://digitalcommons.lsu.edu/geo_pubs/610 doi:10.1002/2014GL062431 https://digitalcommons.lsu.edu/context/geo_pubs/article/1609/viewcontent/610.pdf |
op_doi |
https://doi.org/10.1002/2014GL062431 |
container_title |
Geophysical Research Letters |
container_volume |
42 |
container_issue |
1 |
container_start_page |
96 |
op_container_end_page |
103 |
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1768389587887980544 |