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...
Published in: | The Cryosphere |
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ftcopernicus:oai:publications.copernicus.org:tc105098 2023-05-15T13:38:41+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 T. 2022-11-30 application/pdf https://doi.org/10.5194/tc-16-4797-2022 https://tc.copernicus.org/articles/16/4797/2022/ eng eng doi:10.5194/tc-16-4797-2022 https://tc.copernicus.org/articles/16/4797/2022/ eISSN: 1994-0424 Text 2022 ftcopernicus https://doi.org/10.5194/tc-16-4797-2022 2022-12-05T17:22:41Z 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. Text Antarc* Antarctic Antarctic Peninsula Ice Sheet Mars Glacier Copernicus Publications: E-Journals Antarctic Antarctic Peninsula Mars Glacier ENVELOPE(-68.433,-68.433,-71.833,-71.833) The Antarctic The Cryosphere 16 12 4797 4809 |
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Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
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 |
Text |
author |
Hodgson, Dominic A. Jordan, Tom A. Ross, Neil Riley, Teal R. Fretwell, Peter T. |
spellingShingle |
Hodgson, Dominic A. Jordan, Tom A. Ross, Neil Riley, Teal R. Fretwell, Peter T. 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 T. |
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 |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-4797-2022 https://tc.copernicus.org/articles/16/4797/2022/ |
long_lat |
ENVELOPE(-68.433,-68.433,-71.833,-71.833) |
geographic |
Antarctic Antarctic Peninsula Mars Glacier The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Mars Glacier The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Mars Glacier |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Ice Sheet Mars Glacier |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-16-4797-2022 https://tc.copernicus.org/articles/16/4797/2022/ |
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_ |
1766109699203137536 |