Evidence for pathways of concentrated submarine groundwater discharge in east Antarctica from helicopter-borne electrical resistivity measurements
The Southern Ocean receives limited liquid surface water input from the Antarctic continent. It has been speculated, however, that significant liquid water may flow from beneath the Antarctic Ice Sheet, and that this subglacial flow carries that water along with dissolved nutrients to the coast. The...
Published in: | Hydrology |
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2019
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Online Access: | https://pure.au.dk/portal/da/publications/evidence-for-pathways-of-concentrated-submarine-groundwater-discharge-in-east-antarctica-from-helicopterborne-electrical-resistivity-measurements(2c318e2b-c88d-4d21-a1ff-27832a1ec047).html https://doi.org/10.3390/HYDROLOGY6020054 http://www.scopus.com/inward/record.url?scp=85070755318&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/2c318e2b-c88d-4d21-a1ff-27832a1ec047 2023-10-29T02:31:36+01:00 Evidence for pathways of concentrated submarine groundwater discharge in east Antarctica from helicopter-borne electrical resistivity measurements Foley, Neil Tulaczyk, Slawek M. Grombacher, Denys Doran, Peter T. Mikucki, Jill Myers, Krista F. Foged, Nikolaj Dugan, Hilary Auken, Esben Virginia, Ross 2019 https://pure.au.dk/portal/da/publications/evidence-for-pathways-of-concentrated-submarine-groundwater-discharge-in-east-antarctica-from-helicopterborne-electrical-resistivity-measurements(2c318e2b-c88d-4d21-a1ff-27832a1ec047).html https://doi.org/10.3390/HYDROLOGY6020054 http://www.scopus.com/inward/record.url?scp=85070755318&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Foley , N , Tulaczyk , S M , Grombacher , D , Doran , P T , Mikucki , J , Myers , K F , Foged , N , Dugan , H , Auken , E & Virginia , R 2019 , ' Evidence for pathways of concentrated submarine groundwater discharge in east Antarctica from helicopter-borne electrical resistivity measurements ' , Hydrology , vol. 6 , no. 2 , 54 . https://doi.org/10.3390/HYDROLOGY6020054 Antarctica time-domain electromagnetics Resistivity Subglacial Submarine groundwater discharge article 2019 ftuniaarhuspubl https://doi.org/10.3390/HYDROLOGY6020054 2023-10-04T22:58:45Z The Southern Ocean receives limited liquid surface water input from the Antarctic continent. It has been speculated, however, that significant liquid water may flow from beneath the Antarctic Ice Sheet, and that this subglacial flow carries that water along with dissolved nutrients to the coast. The delivery of solutes, particularly limiting nutrients like bioavailable iron, to the Southern Ocean may contribute to ecosystem processes including primary productivity. Using a helicopter-borne time domain electromagnetic survey along the coastal margins of the McMurdo Dry Valleys region of Southern Victoria Land, Antarctica, we detected subsurface connections between inland lakes, aquifers, and subglacial waters. These waters, which appear as electrically conductive anomalies, are saline and may contain high concentrations of biologically important ions, including iron and silica. Local hydraulic gradients may drive these waters to the coast, where we postulate they emerge as submarine groundwater discharge. This high latitude groundwater system, imaged regionally in the McMurdo Dry Valleys, may be representative of a broader system of Antarctic submarine groundwater discharge that fertilizes the Southern Ocean. In total, it has the potential to deliver tens of gigagrams of bioavailable Fe and Si to the coastal zone. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet McMurdo Dry Valleys Southern Ocean Victoria Land Aarhus University: Research Hydrology 6 2 54 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Antarctica time-domain electromagnetics Resistivity Subglacial Submarine groundwater discharge |
spellingShingle |
Antarctica time-domain electromagnetics Resistivity Subglacial Submarine groundwater discharge Foley, Neil Tulaczyk, Slawek M. Grombacher, Denys Doran, Peter T. Mikucki, Jill Myers, Krista F. Foged, Nikolaj Dugan, Hilary Auken, Esben Virginia, Ross Evidence for pathways of concentrated submarine groundwater discharge in east Antarctica from helicopter-borne electrical resistivity measurements |
topic_facet |
Antarctica time-domain electromagnetics Resistivity Subglacial Submarine groundwater discharge |
description |
The Southern Ocean receives limited liquid surface water input from the Antarctic continent. It has been speculated, however, that significant liquid water may flow from beneath the Antarctic Ice Sheet, and that this subglacial flow carries that water along with dissolved nutrients to the coast. The delivery of solutes, particularly limiting nutrients like bioavailable iron, to the Southern Ocean may contribute to ecosystem processes including primary productivity. Using a helicopter-borne time domain electromagnetic survey along the coastal margins of the McMurdo Dry Valleys region of Southern Victoria Land, Antarctica, we detected subsurface connections between inland lakes, aquifers, and subglacial waters. These waters, which appear as electrically conductive anomalies, are saline and may contain high concentrations of biologically important ions, including iron and silica. Local hydraulic gradients may drive these waters to the coast, where we postulate they emerge as submarine groundwater discharge. This high latitude groundwater system, imaged regionally in the McMurdo Dry Valleys, may be representative of a broader system of Antarctic submarine groundwater discharge that fertilizes the Southern Ocean. In total, it has the potential to deliver tens of gigagrams of bioavailable Fe and Si to the coastal zone. |
format |
Article in Journal/Newspaper |
author |
Foley, Neil Tulaczyk, Slawek M. Grombacher, Denys Doran, Peter T. Mikucki, Jill Myers, Krista F. Foged, Nikolaj Dugan, Hilary Auken, Esben Virginia, Ross |
author_facet |
Foley, Neil Tulaczyk, Slawek M. Grombacher, Denys Doran, Peter T. Mikucki, Jill Myers, Krista F. Foged, Nikolaj Dugan, Hilary Auken, Esben Virginia, Ross |
author_sort |
Foley, Neil |
title |
Evidence for pathways of concentrated submarine groundwater discharge in east Antarctica from helicopter-borne electrical resistivity measurements |
title_short |
Evidence for pathways of concentrated submarine groundwater discharge in east Antarctica from helicopter-borne electrical resistivity measurements |
title_full |
Evidence for pathways of concentrated submarine groundwater discharge in east Antarctica from helicopter-borne electrical resistivity measurements |
title_fullStr |
Evidence for pathways of concentrated submarine groundwater discharge in east Antarctica from helicopter-borne electrical resistivity measurements |
title_full_unstemmed |
Evidence for pathways of concentrated submarine groundwater discharge in east Antarctica from helicopter-borne electrical resistivity measurements |
title_sort |
evidence for pathways of concentrated submarine groundwater discharge in east antarctica from helicopter-borne electrical resistivity measurements |
publishDate |
2019 |
url |
https://pure.au.dk/portal/da/publications/evidence-for-pathways-of-concentrated-submarine-groundwater-discharge-in-east-antarctica-from-helicopterborne-electrical-resistivity-measurements(2c318e2b-c88d-4d21-a1ff-27832a1ec047).html https://doi.org/10.3390/HYDROLOGY6020054 http://www.scopus.com/inward/record.url?scp=85070755318&partnerID=8YFLogxK |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet McMurdo Dry Valleys Southern Ocean Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet McMurdo Dry Valleys Southern Ocean Victoria Land |
op_source |
Foley , N , Tulaczyk , S M , Grombacher , D , Doran , P T , Mikucki , J , Myers , K F , Foged , N , Dugan , H , Auken , E & Virginia , R 2019 , ' Evidence for pathways of concentrated submarine groundwater discharge in east Antarctica from helicopter-borne electrical resistivity measurements ' , Hydrology , vol. 6 , no. 2 , 54 . https://doi.org/10.3390/HYDROLOGY6020054 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/HYDROLOGY6020054 |
container_title |
Hydrology |
container_volume |
6 |
container_issue |
2 |
container_start_page |
54 |
_version_ |
1781052262511017984 |