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 |
---|---|
Main Authors: | , , , , , , , , , |
Format: | Text |
Language: | English |
Published: |
Multidisciplinary Digital Publishing Institute
2019
|
Subjects: | |
Online Access: | https://doi.org/10.3390/hydrology6020054 |
id |
ftmdpi:oai:mdpi.com:/2306-5338/6/2/54/ |
---|---|
record_format |
openpolar |
spelling |
ftmdpi:oai:mdpi.com:/2306-5338/6/2/54/ 2023-08-20T04:00:41+02:00 Evidence for Pathways of Concentrated Submarine Groundwater Discharge in East Antarctica from Helicopter-Borne Electrical Resistivity Measurements Neil Foley Slawek M. Tulaczyk Denys Grombacher Peter T. Doran Jill Mikucki Krista F. Myers Nikolaj Foged Hilary Dugan Esben Auken Ross Virginia agris 2019-06-20 application/pdf https://doi.org/10.3390/hydrology6020054 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/hydrology6020054 https://creativecommons.org/licenses/by/4.0/ Hydrology; Volume 6; Issue 2; Pages: 54 subglacial Antarctica time-domain electromagnetics submarine groundwater discharge resistivity Text 2019 ftmdpi https://doi.org/10.3390/hydrology6020054 2023-07-31T22:22:20Z 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. Text Antarc* Antarctic Antarctica East Antarctica Ice Sheet McMurdo Dry Valleys Southern Ocean Victoria Land MDPI Open Access Publishing Antarctic East Antarctica McMurdo Dry Valleys Southern Ocean The Antarctic Victoria Land Hydrology 6 2 54 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
subglacial Antarctica time-domain electromagnetics submarine groundwater discharge resistivity |
spellingShingle |
subglacial Antarctica time-domain electromagnetics submarine groundwater discharge resistivity Neil Foley Slawek M. Tulaczyk Denys Grombacher Peter T. Doran Jill Mikucki Krista F. Myers Nikolaj Foged Hilary Dugan Esben Auken Ross Virginia Evidence for Pathways of Concentrated Submarine Groundwater Discharge in East Antarctica from Helicopter-Borne Electrical Resistivity Measurements |
topic_facet |
subglacial Antarctica time-domain electromagnetics submarine groundwater discharge resistivity |
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 |
Text |
author |
Neil Foley Slawek M. Tulaczyk Denys Grombacher Peter T. Doran Jill Mikucki Krista F. Myers Nikolaj Foged Hilary Dugan Esben Auken Ross Virginia |
author_facet |
Neil Foley Slawek M. Tulaczyk Denys Grombacher Peter T. Doran Jill Mikucki Krista F. Myers Nikolaj Foged Hilary Dugan Esben Auken Ross Virginia |
author_sort |
Neil Foley |
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 |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2019 |
url |
https://doi.org/10.3390/hydrology6020054 |
op_coverage |
agris |
geographic |
Antarctic East Antarctica McMurdo Dry Valleys Southern Ocean The Antarctic Victoria Land |
geographic_facet |
Antarctic East Antarctica McMurdo Dry Valleys Southern Ocean The Antarctic Victoria Land |
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 |
Hydrology; Volume 6; Issue 2; Pages: 54 |
op_relation |
https://dx.doi.org/10.3390/hydrology6020054 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/hydrology6020054 |
container_title |
Hydrology |
container_volume |
6 |
container_issue |
2 |
container_start_page |
54 |
_version_ |
1774719679109005312 |