The trough-system algorithm and its application to spatial modeling of Greenland subglacial topography
This is the published version. Copyright 2014 Herzfeld et al. Dynamic ice-sheet models are used to assess the contribution of mass loss from the Greenland ice sheet to sea-level rise. Mass transfer from ice sheet to ocean is in a large part through outlet glaciers. Bed topography plays an important...
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International Glaciological Society
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Online Access: | http://hdl.handle.net/1808/18708 https://doi.org/10.3189/2014AoG67A001 |
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ftunivkansas:oai:kuscholarworks.ku.edu:1808/18708 2023-05-15T13:29:43+02:00 The trough-system algorithm and its application to spatial modeling of Greenland subglacial topography Herzfeld, Ute C. McDonald, Brian W. Wallin, Bruce F. Chen, Phillip A. Mayer, Helmut Paden, John D. Leuschen, Carl J. 2015-10-20T14:16:04Z http://hdl.handle.net/1808/18708 https://doi.org/10.3189/2014AoG67A001 unknown International Glaciological Society Herzfeld, Ute C., Brian W. Mcdonald, Bruce F. Wallin, Phillip A. Chen, Helmut Mayer, John Paden, and Carlton J. Leuschen. "The Trough-system Algorithm and Its Application to Spatial Modeling of Greenland Subglacial Topography." Annals of Glaciology 55.67 (2014): 115-26. http://dx.doi.org/10.3189/2014AoG67A001. http://hdl.handle.net/1808/18708 doi:10.3189/2014AoG67A001 openAccess Arctic glaciology Glaciological instruments and methods Ground-penetrating radar Ice-sheet modelling Radio-echo sounding Article 2015 ftunivkansas https://doi.org/10.3189/2014AoG67A001 2022-08-26T13:17:51Z This is the published version. Copyright 2014 Herzfeld et al. Dynamic ice-sheet models are used to assess the contribution of mass loss from the Greenland ice sheet to sea-level rise. Mass transfer from ice sheet to ocean is in a large part through outlet glaciers. Bed topography plays an important role in ice dynamics, since the acceleration from the slow-moving inland ice to an ice stream is in many cases caused by the existence of a subglacial trough or trough system. Problems are that most subglacial troughs are features of a scale not resolved in most ice-sheet models and that radar measurements of subglacial topography do not always reach the bottoms of narrow troughs. The trough-system algorithm introduced here employs mathematical morphology and algebraic topology to correctly represent subscale features in a topographic generalization, so the effects of troughs on ice flow are retained in ice-dynamic models. The algorithm is applied to derive a spatial elevation model of Greenland subglacial topography, integrating recently collected radar measurements (CReSIS data) of the Jakobshavn Isbræ, Helheim, Kangerdlussuaq and Petermann glacier regions. The resultant JakHelKanPet digital elevation model has been applied in dynamic ice-sheet modeling and sea-level-rise assessment. Article in Journal/Newspaper Annals of Glaciology Arctic glacier Greenland Ice Sheet Jakobshavn Jakobshavn isbræ Petermann glacier The University of Kansas: KU ScholarWorks Arctic Greenland Jakobshavn Isbræ ENVELOPE(-49.917,-49.917,69.167,69.167) Annals of Glaciology 55 67 115 126 |
institution |
Open Polar |
collection |
The University of Kansas: KU ScholarWorks |
op_collection_id |
ftunivkansas |
language |
unknown |
topic |
Arctic glaciology Glaciological instruments and methods Ground-penetrating radar Ice-sheet modelling Radio-echo sounding |
spellingShingle |
Arctic glaciology Glaciological instruments and methods Ground-penetrating radar Ice-sheet modelling Radio-echo sounding Herzfeld, Ute C. McDonald, Brian W. Wallin, Bruce F. Chen, Phillip A. Mayer, Helmut Paden, John D. Leuschen, Carl J. The trough-system algorithm and its application to spatial modeling of Greenland subglacial topography |
topic_facet |
Arctic glaciology Glaciological instruments and methods Ground-penetrating radar Ice-sheet modelling Radio-echo sounding |
description |
This is the published version. Copyright 2014 Herzfeld et al. Dynamic ice-sheet models are used to assess the contribution of mass loss from the Greenland ice sheet to sea-level rise. Mass transfer from ice sheet to ocean is in a large part through outlet glaciers. Bed topography plays an important role in ice dynamics, since the acceleration from the slow-moving inland ice to an ice stream is in many cases caused by the existence of a subglacial trough or trough system. Problems are that most subglacial troughs are features of a scale not resolved in most ice-sheet models and that radar measurements of subglacial topography do not always reach the bottoms of narrow troughs. The trough-system algorithm introduced here employs mathematical morphology and algebraic topology to correctly represent subscale features in a topographic generalization, so the effects of troughs on ice flow are retained in ice-dynamic models. The algorithm is applied to derive a spatial elevation model of Greenland subglacial topography, integrating recently collected radar measurements (CReSIS data) of the Jakobshavn Isbræ, Helheim, Kangerdlussuaq and Petermann glacier regions. The resultant JakHelKanPet digital elevation model has been applied in dynamic ice-sheet modeling and sea-level-rise assessment. |
format |
Article in Journal/Newspaper |
author |
Herzfeld, Ute C. McDonald, Brian W. Wallin, Bruce F. Chen, Phillip A. Mayer, Helmut Paden, John D. Leuschen, Carl J. |
author_facet |
Herzfeld, Ute C. McDonald, Brian W. Wallin, Bruce F. Chen, Phillip A. Mayer, Helmut Paden, John D. Leuschen, Carl J. |
author_sort |
Herzfeld, Ute C. |
title |
The trough-system algorithm and its application to spatial modeling of Greenland subglacial topography |
title_short |
The trough-system algorithm and its application to spatial modeling of Greenland subglacial topography |
title_full |
The trough-system algorithm and its application to spatial modeling of Greenland subglacial topography |
title_fullStr |
The trough-system algorithm and its application to spatial modeling of Greenland subglacial topography |
title_full_unstemmed |
The trough-system algorithm and its application to spatial modeling of Greenland subglacial topography |
title_sort |
trough-system algorithm and its application to spatial modeling of greenland subglacial topography |
publisher |
International Glaciological Society |
publishDate |
2015 |
url |
http://hdl.handle.net/1808/18708 https://doi.org/10.3189/2014AoG67A001 |
long_lat |
ENVELOPE(-49.917,-49.917,69.167,69.167) |
geographic |
Arctic Greenland Jakobshavn Isbræ |
geographic_facet |
Arctic Greenland Jakobshavn Isbræ |
genre |
Annals of Glaciology Arctic glacier Greenland Ice Sheet Jakobshavn Jakobshavn isbræ Petermann glacier |
genre_facet |
Annals of Glaciology Arctic glacier Greenland Ice Sheet Jakobshavn Jakobshavn isbræ Petermann glacier |
op_relation |
Herzfeld, Ute C., Brian W. Mcdonald, Bruce F. Wallin, Phillip A. Chen, Helmut Mayer, John Paden, and Carlton J. Leuschen. "The Trough-system Algorithm and Its Application to Spatial Modeling of Greenland Subglacial Topography." Annals of Glaciology 55.67 (2014): 115-26. http://dx.doi.org/10.3189/2014AoG67A001. http://hdl.handle.net/1808/18708 doi:10.3189/2014AoG67A001 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.3189/2014AoG67A001 |
container_title |
Annals of Glaciology |
container_volume |
55 |
container_issue |
67 |
container_start_page |
115 |
op_container_end_page |
126 |
_version_ |
1766002427300937728 |