Drainage and refill of an Antarctic Peninsula subglacial lake reveal an active subglacial hydrological network
The presence of subglacial lakes and subglacial hydrological networks under the East and West Antarctic ice sheets is now relatively well understood, whilst their influence on ice dynamics is the subject of ongoing research. In contrast, little is known about subglacial lakes and hydrological networ...
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European Geosciences Union
2022
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ftnerc:oai:nora.nerc.ac.uk:532840 2023-05-15T13:41:46+02:00 Drainage and refill of an Antarctic Peninsula subglacial lake reveal an active subglacial hydrological network Hodgson, Dominic A. Jordan, Tom A. Ross, Neil Riley, Teal R. Fretwell, Peter 2022-11-30 text http://nora.nerc.ac.uk/id/eprint/532840/ https://nora.nerc.ac.uk/id/eprint/532840/1/tc-16-4797-2022.pdf https://tc.copernicus.org/articles/16/4797/2022/ en eng European Geosciences Union https://nora.nerc.ac.uk/id/eprint/532840/1/tc-16-4797-2022.pdf Hodgson, Dominic A. orcid:0000-0002-3841-3746 Jordan, Tom A. orcid:0000-0003-2780-1986 Ross, Neil orcid:0000-0002-8338-4905 Riley, Teal R. orcid:0000-0002-3333-5021 Fretwell, Peter orcid:0000-0002-1988-5844 . 2022 Drainage and refill of an Antarctic Peninsula subglacial lake reveal an active subglacial hydrological network. The Cryosphere, 16 (12). 4797-4809. https://doi.org/10.5194/tc-16-4797-2022 <https://doi.org/10.5194/tc-16-4797-2022> cc_by_4 CC-BY Publication - Article PeerReviewed 2022 ftnerc https://doi.org/10.5194/tc-16-4797-2022 2023-02-04T19:53:25Z The presence of subglacial lakes and subglacial hydrological networks under the East and West Antarctic ice sheets is now relatively well understood, whilst their influence on ice dynamics is the subject of ongoing research. In contrast, little is known about subglacial lakes and hydrological networks under the Antarctic Peninsula Ice Sheet and how these are influencing glacier behaviour. Here we describe the rapid drainage and slow refill of a subglacial lake under Mars Glacier using remote sensing and aerogeophysics. Results suggest drainage of the subglacial lake occurred prior to 2011, resulting in the collapse of the overlying ice into the newly formed subglacial cavity. The cavity has been refilling since this time, with peak rates of infilling associated with seasonal surface meltwater activity. We review evidence for similar features elsewhere in the Antarctic Peninsula and discuss whether their appearance marks a threshold shift in glacier thermal regimes and the activation or enhancement of their subglacial hydrological networks by surface meltwater. Collectively, these features show coupling of climate processes and the bed of the region's glaciers highlighting their ongoing vulnerability to climate change. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Ice Sheet Mars Glacier The Cryosphere Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Antarctic Peninsula Mars Glacier ENVELOPE(-68.433,-68.433,-71.833,-71.833) The Cryosphere 16 12 4797 4809 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The presence of subglacial lakes and subglacial hydrological networks under the East and West Antarctic ice sheets is now relatively well understood, whilst their influence on ice dynamics is the subject of ongoing research. In contrast, little is known about subglacial lakes and hydrological networks under the Antarctic Peninsula Ice Sheet and how these are influencing glacier behaviour. Here we describe the rapid drainage and slow refill of a subglacial lake under Mars Glacier using remote sensing and aerogeophysics. Results suggest drainage of the subglacial lake occurred prior to 2011, resulting in the collapse of the overlying ice into the newly formed subglacial cavity. The cavity has been refilling since this time, with peak rates of infilling associated with seasonal surface meltwater activity. We review evidence for similar features elsewhere in the Antarctic Peninsula and discuss whether their appearance marks a threshold shift in glacier thermal regimes and the activation or enhancement of their subglacial hydrological networks by surface meltwater. Collectively, these features show coupling of climate processes and the bed of the region's glaciers highlighting their ongoing vulnerability to climate change. |
format |
Article in Journal/Newspaper |
author |
Hodgson, Dominic A. Jordan, Tom A. Ross, Neil Riley, Teal R. Fretwell, Peter |
spellingShingle |
Hodgson, Dominic A. Jordan, Tom A. Ross, Neil Riley, Teal R. Fretwell, Peter Drainage and refill of an Antarctic Peninsula subglacial lake reveal an active subglacial hydrological network |
author_facet |
Hodgson, Dominic A. Jordan, Tom A. Ross, Neil Riley, Teal R. Fretwell, Peter |
author_sort |
Hodgson, Dominic A. |
title |
Drainage and refill of an Antarctic Peninsula subglacial lake reveal an active subglacial hydrological network |
title_short |
Drainage and refill of an Antarctic Peninsula subglacial lake reveal an active subglacial hydrological network |
title_full |
Drainage and refill of an Antarctic Peninsula subglacial lake reveal an active subglacial hydrological network |
title_fullStr |
Drainage and refill of an Antarctic Peninsula subglacial lake reveal an active subglacial hydrological network |
title_full_unstemmed |
Drainage and refill of an Antarctic Peninsula subglacial lake reveal an active subglacial hydrological network |
title_sort |
drainage and refill of an antarctic peninsula subglacial lake reveal an active subglacial hydrological network |
publisher |
European Geosciences Union |
publishDate |
2022 |
url |
http://nora.nerc.ac.uk/id/eprint/532840/ https://nora.nerc.ac.uk/id/eprint/532840/1/tc-16-4797-2022.pdf https://tc.copernicus.org/articles/16/4797/2022/ |
long_lat |
ENVELOPE(-68.433,-68.433,-71.833,-71.833) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Mars Glacier |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Mars Glacier |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Mars Glacier The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Mars Glacier The Cryosphere |
op_relation |
https://nora.nerc.ac.uk/id/eprint/532840/1/tc-16-4797-2022.pdf Hodgson, Dominic A. orcid:0000-0002-3841-3746 Jordan, Tom A. orcid:0000-0003-2780-1986 Ross, Neil orcid:0000-0002-8338-4905 Riley, Teal R. orcid:0000-0002-3333-5021 Fretwell, Peter orcid:0000-0002-1988-5844 . 2022 Drainage and refill of an Antarctic Peninsula subglacial lake reveal an active subglacial hydrological network. The Cryosphere, 16 (12). 4797-4809. https://doi.org/10.5194/tc-16-4797-2022 <https://doi.org/10.5194/tc-16-4797-2022> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/tc-16-4797-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
12 |
container_start_page |
4797 |
op_container_end_page |
4809 |
_version_ |
1766157914522779648 |