Paleofluvial Mega-Canyon Beneath the Central Greenland Ice Sheet
Subglacial topography plays an important role in modulating the distribution and flow of basal water. Where topography predates ice sheet inception, it can also reveal insights into former tectonic and geomorphological processes. Although such associations are known in Antarctica, little considerati...
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ftunivurbino:oai:ora.uniurb.it:11576/2590985 2024-04-14T08:03:58+00:00 Paleofluvial Mega-Canyon Beneath the Central Greenland Ice Sheet J. L. Bamber M. J. Siegert J. A. Griggs S. J. Marshall SPADA, GIORGIO J. L., Bamber M. J., Siegert J. A., Grigg S. J., Marshall Spada, Giorgio 2013 STAMPA http://hdl.handle.net/11576/2590985 https://doi.org/10.1126/science.1239794 http://www.sciencemag.org/content/341/6149/997.short eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000323652300041 volume:341 issue:6149 firstpage:997 lastpage:999 numberofpages:3 journal:SCIENCE http://hdl.handle.net/11576/2590985 doi:10.1126/science.1239794 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84883071679 http://www.sciencemag.org/content/341/6149/997.short Supplementary material linked to: www.sciencemag.org/cgi/content/full/341/6149/997/DC1 N/A info:eu-repo/semantics/article 2013 ftunivurbino https://doi.org/10.1126/science.1239794 2024-03-21T17:05:38Z Subglacial topography plays an important role in modulating the distribution and flow of basal water. Where topography predates ice sheet inception, it can also reveal insights into former tectonic and geomorphological processes. Although such associations are known in Antarctica, little consideration has been given to them in Greenland, partly because much of the ice sheet bed is thought to be relatively flat and smooth. Here, we present evidence from ice-penetrating radar data for a 750-km-long subglacial canyon in northern Greenland that is likely to have influenced basal water flow from the ice sheet interior to the margin. We suggest that the mega-canyon predates ice sheet inception and will have influenced basal hydrology in Greenland over past glacial cycles. Article in Journal/Newspaper Antarc* Antarctica Greenland Ice Sheet Università degli Studi di Urbino: CINECA IRIS Greenland Science 341 6149 997 999 |
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Università degli Studi di Urbino: CINECA IRIS |
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ftunivurbino |
language |
English |
topic |
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N/A J. L. Bamber M. J. Siegert J. A. Griggs S. J. Marshall SPADA, GIORGIO Paleofluvial Mega-Canyon Beneath the Central Greenland Ice Sheet |
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N/A |
description |
Subglacial topography plays an important role in modulating the distribution and flow of basal water. Where topography predates ice sheet inception, it can also reveal insights into former tectonic and geomorphological processes. Although such associations are known in Antarctica, little consideration has been given to them in Greenland, partly because much of the ice sheet bed is thought to be relatively flat and smooth. Here, we present evidence from ice-penetrating radar data for a 750-km-long subglacial canyon in northern Greenland that is likely to have influenced basal water flow from the ice sheet interior to the margin. We suggest that the mega-canyon predates ice sheet inception and will have influenced basal hydrology in Greenland over past glacial cycles. |
author2 |
J. L., Bamber M. J., Siegert J. A., Grigg S. J., Marshall Spada, Giorgio |
format |
Article in Journal/Newspaper |
author |
J. L. Bamber M. J. Siegert J. A. Griggs S. J. Marshall SPADA, GIORGIO |
author_facet |
J. L. Bamber M. J. Siegert J. A. Griggs S. J. Marshall SPADA, GIORGIO |
author_sort |
J. L. Bamber |
title |
Paleofluvial Mega-Canyon Beneath the Central Greenland Ice Sheet |
title_short |
Paleofluvial Mega-Canyon Beneath the Central Greenland Ice Sheet |
title_full |
Paleofluvial Mega-Canyon Beneath the Central Greenland Ice Sheet |
title_fullStr |
Paleofluvial Mega-Canyon Beneath the Central Greenland Ice Sheet |
title_full_unstemmed |
Paleofluvial Mega-Canyon Beneath the Central Greenland Ice Sheet |
title_sort |
paleofluvial mega-canyon beneath the central greenland ice sheet |
publishDate |
2013 |
url |
http://hdl.handle.net/11576/2590985 https://doi.org/10.1126/science.1239794 http://www.sciencemag.org/content/341/6149/997.short |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Antarc* Antarctica Greenland Ice Sheet |
genre_facet |
Antarc* Antarctica Greenland Ice Sheet |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000323652300041 volume:341 issue:6149 firstpage:997 lastpage:999 numberofpages:3 journal:SCIENCE http://hdl.handle.net/11576/2590985 doi:10.1126/science.1239794 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84883071679 http://www.sciencemag.org/content/341/6149/997.short Supplementary material linked to: www.sciencemag.org/cgi/content/full/341/6149/997/DC1 |
op_doi |
https://doi.org/10.1126/science.1239794 |
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Science |
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341 |
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6149 |
container_start_page |
997 |
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999 |
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