Annals of Glaciology 45 2007 163 Cauldron subsidence and subglacial floods
ABSTRACT. Ice cauldrons are depressions which form at the surface of ice sheets when an underlying subglacial lake empties, in particular when subglacial volcanic eruptions occur. Notable examples of such cauldrons occur on the surface of the Vatnajökull ice cap in Iceland. More generally, cauldrons...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.429.7298 2023-05-15T13:42:51+02:00 Annals of Glaciology 45 2007 163 Cauldron subsidence and subglacial floods G. W. Evatt A. C. Fowler The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.429.7298 http://www.igsoc.org/annals/45/a45a038.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.429.7298 http://www.igsoc.org/annals/45/a45a038.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.igsoc.org/annals/45/a45a038.pdf text ftciteseerx 2016-01-08T04:32:32Z ABSTRACT. Ice cauldrons are depressions which form at the surface of ice sheets when an underlying subglacial lake empties, in particular when subglacial volcanic eruptions occur. Notable examples of such cauldrons occur on the surface of the Vatnajökull ice cap in Iceland. More generally, cauldrons will form when a subglacial lake empties during a jökulhlaup. The rate of subsidence of the ice surface is related to the rate at which the subglacial water empties from the lake. We use a viscous version of classical beam theory applied to the ice sheet to determine the relation between the subsidence rate and flood discharge. We use the results to make inferences concerning ring fracture spacings in cauldrons, the consequent effect on flood discharge dynamics and the likely nature of subsidence events in the Antarctic Ice Sheet. 1. Text Antarc* Antarctic Ice cap Ice Sheet Iceland Vatnajökull Unknown Antarctic The Antarctic Vatnajökull ENVELOPE(-16.823,-16.823,64.420,64.420) |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
ABSTRACT. Ice cauldrons are depressions which form at the surface of ice sheets when an underlying subglacial lake empties, in particular when subglacial volcanic eruptions occur. Notable examples of such cauldrons occur on the surface of the Vatnajökull ice cap in Iceland. More generally, cauldrons will form when a subglacial lake empties during a jökulhlaup. The rate of subsidence of the ice surface is related to the rate at which the subglacial water empties from the lake. We use a viscous version of classical beam theory applied to the ice sheet to determine the relation between the subsidence rate and flood discharge. We use the results to make inferences concerning ring fracture spacings in cauldrons, the consequent effect on flood discharge dynamics and the likely nature of subsidence events in the Antarctic Ice Sheet. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
G. W. Evatt A. C. Fowler |
spellingShingle |
G. W. Evatt A. C. Fowler Annals of Glaciology 45 2007 163 Cauldron subsidence and subglacial floods |
author_facet |
G. W. Evatt A. C. Fowler |
author_sort |
G. W. Evatt |
title |
Annals of Glaciology 45 2007 163 Cauldron subsidence and subglacial floods |
title_short |
Annals of Glaciology 45 2007 163 Cauldron subsidence and subglacial floods |
title_full |
Annals of Glaciology 45 2007 163 Cauldron subsidence and subglacial floods |
title_fullStr |
Annals of Glaciology 45 2007 163 Cauldron subsidence and subglacial floods |
title_full_unstemmed |
Annals of Glaciology 45 2007 163 Cauldron subsidence and subglacial floods |
title_sort |
annals of glaciology 45 2007 163 cauldron subsidence and subglacial floods |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.429.7298 http://www.igsoc.org/annals/45/a45a038.pdf |
long_lat |
ENVELOPE(-16.823,-16.823,64.420,64.420) |
geographic |
Antarctic The Antarctic Vatnajökull |
geographic_facet |
Antarctic The Antarctic Vatnajökull |
genre |
Antarc* Antarctic Ice cap Ice Sheet Iceland Vatnajökull |
genre_facet |
Antarc* Antarctic Ice cap Ice Sheet Iceland Vatnajökull |
op_source |
http://www.igsoc.org/annals/45/a45a038.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.429.7298 http://www.igsoc.org/annals/45/a45a038.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766173354651287552 |