Katabatic wind influence on meltwater supply to fuel glacier-substrate interactions at grounding line, Terra Nova Bay, Antarctica
The co-isotopic composition, both in δD and in δ18O, of interbedded debris-rich and clear ice layers, thought to have been formed at the grounding line of Hells Gate Ice Shelf, indicates freezing by a double-diffusion effect between continental meltwater and sea water within a subglacial sediment. A...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/173121 2023-05-15T13:29:17+02:00 Katabatic wind influence on meltwater supply to fuel glacier-substrate interactions at grounding line, Terra Nova Bay, Antarctica Bouzette, Ariane Souchez, Roland 1999-01 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/173121 https://dipot.ulb.ac.be/dspace/bitstream/2013/173121/3/doi_156751.pdf en eng uri/info:doi/10.3189/172756499781821706 https://dipot.ulb.ac.be/dspace/bitstream/2013/173121/3/doi_156751.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/173121 1 full-text file(s): info:eu-repo/semantics/restrictedAccess Annals of glaciology, 28 (1 Glaciologie info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 1999 ftunivbruxelles 2022-06-12T20:34:48Z The co-isotopic composition, both in δD and in δ18O, of interbedded debris-rich and clear ice layers, thought to have been formed at the grounding line of Hells Gate Ice Shelf, indicates freezing by a double-diffusion effect between continental meltwater and sea water within a subglacial sediment. A source of meltwater is required to sustain the process, since the temperature of the bed is below the freshwater melting point. The most likely source is a surficially frozen meltwater lake.Rock outcrops, kept mostly snow-free by the action of katabatic winds, absorb solar radiation so local production of liquid water becomes possible in an area with year-round subfreezing air-temperature conditions. The meltwater accumulated in a marginal lake can eventually reach the subglacial substratum near a pinning point where the ice is relatively thin and fractured info:eu-repo/semantics/published Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctica Ice Shelf DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Hells Gate ENVELOPE(163.800,163.800,-74.850,-74.850) Marginal Lake ENVELOPE(163.500,163.500,-74.600,-74.600) Terra Nova Bay |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Glaciologie |
spellingShingle |
Glaciologie Bouzette, Ariane Souchez, Roland Katabatic wind influence on meltwater supply to fuel glacier-substrate interactions at grounding line, Terra Nova Bay, Antarctica |
topic_facet |
Glaciologie |
description |
The co-isotopic composition, both in δD and in δ18O, of interbedded debris-rich and clear ice layers, thought to have been formed at the grounding line of Hells Gate Ice Shelf, indicates freezing by a double-diffusion effect between continental meltwater and sea water within a subglacial sediment. A source of meltwater is required to sustain the process, since the temperature of the bed is below the freshwater melting point. The most likely source is a surficially frozen meltwater lake.Rock outcrops, kept mostly snow-free by the action of katabatic winds, absorb solar radiation so local production of liquid water becomes possible in an area with year-round subfreezing air-temperature conditions. The meltwater accumulated in a marginal lake can eventually reach the subglacial substratum near a pinning point where the ice is relatively thin and fractured info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
Bouzette, Ariane Souchez, Roland |
author_facet |
Bouzette, Ariane Souchez, Roland |
author_sort |
Bouzette, Ariane |
title |
Katabatic wind influence on meltwater supply to fuel glacier-substrate interactions at grounding line, Terra Nova Bay, Antarctica |
title_short |
Katabatic wind influence on meltwater supply to fuel glacier-substrate interactions at grounding line, Terra Nova Bay, Antarctica |
title_full |
Katabatic wind influence on meltwater supply to fuel glacier-substrate interactions at grounding line, Terra Nova Bay, Antarctica |
title_fullStr |
Katabatic wind influence on meltwater supply to fuel glacier-substrate interactions at grounding line, Terra Nova Bay, Antarctica |
title_full_unstemmed |
Katabatic wind influence on meltwater supply to fuel glacier-substrate interactions at grounding line, Terra Nova Bay, Antarctica |
title_sort |
katabatic wind influence on meltwater supply to fuel glacier-substrate interactions at grounding line, terra nova bay, antarctica |
publishDate |
1999 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/173121 https://dipot.ulb.ac.be/dspace/bitstream/2013/173121/3/doi_156751.pdf |
long_lat |
ENVELOPE(163.800,163.800,-74.850,-74.850) ENVELOPE(163.500,163.500,-74.600,-74.600) |
geographic |
Hells Gate Marginal Lake Terra Nova Bay |
geographic_facet |
Hells Gate Marginal Lake Terra Nova Bay |
genre |
Annals of Glaciology Antarc* Antarctica Ice Shelf |
genre_facet |
Annals of Glaciology Antarc* Antarctica Ice Shelf |
op_source |
Annals of glaciology, 28 (1 |
op_relation |
uri/info:doi/10.3189/172756499781821706 https://dipot.ulb.ac.be/dspace/bitstream/2013/173121/3/doi_156751.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/173121 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/restrictedAccess |
_version_ |
1765999726280310784 |