BedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Multibeam Echo Sounding Combined With Mass Conservation
Greenland's bed topography is a primary control on ice flow, grounding line migration, calving dynamics, and subglacial drainage. Moreover, fjord bathymetry regulates the penetration of warm Atlantic water (AW) that rapidly melts and undercuts Greenland's marine-terminating glaciers. Here...
Published in: | Geophysical Research Letters |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2017
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ftcdlib:qt4t89q4g7 2023-05-15T16:23:40+02:00 BedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Multibeam Echo Sounding Combined With Mass Conservation Morlighem, M Williams, CN Rignot, E An, L Arndt, JE Bamber, JL Catania, G Chauche, N Dowdeswell, JA Dorschel, B Fenty, I Hogan, K Howat, I Hubbard, A Jakobsson, M Jordan, TM Kjeldsen, KK Millan, R Mayer, L Mouginot, J Noel, BPY O'Cofaigh, C Palmer, S Rysgaard, S Seroussi, H Siegert, MJ Slabon, P Straneo, F van den Broeke, MR Weinrebe, W Wood, M Zinglersen, KB 11051 - 11061 2017-11-16 application/pdf http://www.escholarship.org/uc/item/4t89q4g7 english eng eScholarship, University of California qt4t89q4g7 http://www.escholarship.org/uc/item/4t89q4g7 Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ CC-BY Morlighem, M; Williams, CN; Rignot, E; An, L; Arndt, JE; Bamber, JL; et al.(2017). BedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Multibeam Echo Sounding Combined With Mass Conservation. GEOPHYSICAL RESEARCH LETTERS, 44(21), 11051 - 11061. doi:10.1002/2017GL074954. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/4t89q4g7 article 2017 ftcdlib https://doi.org/10.1002/2017GL074954 2018-07-13T22:58:20Z Greenland's bed topography is a primary control on ice flow, grounding line migration, calving dynamics, and subglacial drainage. Moreover, fjord bathymetry regulates the penetration of warm Atlantic water (AW) that rapidly melts and undercuts Greenland's marine-terminating glaciers. Here we present a new compilation of Greenland bed topography that assimilates seafloor bathymetry and ice thickness data through a mass conservation approach. A new 150 m horizontal resolution bed topography/bathymetric map of Greenland is constructed with seamless transitions at the ice/ocean interface, yielding major improvements over previous data sets, particularly in the marine-terminating sectors of northwest and southeast Greenland. Our map reveals that the total sea level potential of the Greenland ice sheet is 7.42 ± 0.05 m, which is 7 cm greater than previous estimates. Furthermore, it explains recent calving front response of numerous outlet glaciers and reveals new pathways by which AW can access glaciers with marine-based basins, thereby highlighting sectors of Greenland that are most vulnerable to future oceanic forcing. Article in Journal/Newspaper Greenland Ice Sheet University of California: eScholarship Greenland Geophysical Research Letters 44 21 |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
English |
description |
Greenland's bed topography is a primary control on ice flow, grounding line migration, calving dynamics, and subglacial drainage. Moreover, fjord bathymetry regulates the penetration of warm Atlantic water (AW) that rapidly melts and undercuts Greenland's marine-terminating glaciers. Here we present a new compilation of Greenland bed topography that assimilates seafloor bathymetry and ice thickness data through a mass conservation approach. A new 150 m horizontal resolution bed topography/bathymetric map of Greenland is constructed with seamless transitions at the ice/ocean interface, yielding major improvements over previous data sets, particularly in the marine-terminating sectors of northwest and southeast Greenland. Our map reveals that the total sea level potential of the Greenland ice sheet is 7.42 ± 0.05 m, which is 7 cm greater than previous estimates. Furthermore, it explains recent calving front response of numerous outlet glaciers and reveals new pathways by which AW can access glaciers with marine-based basins, thereby highlighting sectors of Greenland that are most vulnerable to future oceanic forcing. |
format |
Article in Journal/Newspaper |
author |
Morlighem, M Williams, CN Rignot, E An, L Arndt, JE Bamber, JL Catania, G Chauche, N Dowdeswell, JA Dorschel, B Fenty, I Hogan, K Howat, I Hubbard, A Jakobsson, M Jordan, TM Kjeldsen, KK Millan, R Mayer, L Mouginot, J Noel, BPY O'Cofaigh, C Palmer, S Rysgaard, S Seroussi, H Siegert, MJ Slabon, P Straneo, F van den Broeke, MR Weinrebe, W Wood, M Zinglersen, KB |
spellingShingle |
Morlighem, M Williams, CN Rignot, E An, L Arndt, JE Bamber, JL Catania, G Chauche, N Dowdeswell, JA Dorschel, B Fenty, I Hogan, K Howat, I Hubbard, A Jakobsson, M Jordan, TM Kjeldsen, KK Millan, R Mayer, L Mouginot, J Noel, BPY O'Cofaigh, C Palmer, S Rysgaard, S Seroussi, H Siegert, MJ Slabon, P Straneo, F van den Broeke, MR Weinrebe, W Wood, M Zinglersen, KB BedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Multibeam Echo Sounding Combined With Mass Conservation |
author_facet |
Morlighem, M Williams, CN Rignot, E An, L Arndt, JE Bamber, JL Catania, G Chauche, N Dowdeswell, JA Dorschel, B Fenty, I Hogan, K Howat, I Hubbard, A Jakobsson, M Jordan, TM Kjeldsen, KK Millan, R Mayer, L Mouginot, J Noel, BPY O'Cofaigh, C Palmer, S Rysgaard, S Seroussi, H Siegert, MJ Slabon, P Straneo, F van den Broeke, MR Weinrebe, W Wood, M Zinglersen, KB |
author_sort |
Morlighem, M |
title |
BedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Multibeam Echo Sounding Combined With Mass Conservation |
title_short |
BedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Multibeam Echo Sounding Combined With Mass Conservation |
title_full |
BedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Multibeam Echo Sounding Combined With Mass Conservation |
title_fullStr |
BedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Multibeam Echo Sounding Combined With Mass Conservation |
title_full_unstemmed |
BedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Multibeam Echo Sounding Combined With Mass Conservation |
title_sort |
bedmachine v3: complete bed topography and ocean bathymetry mapping of greenland from multibeam echo sounding combined with mass conservation |
publisher |
eScholarship, University of California |
publishDate |
2017 |
url |
http://www.escholarship.org/uc/item/4t89q4g7 |
op_coverage |
11051 - 11061 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Morlighem, M; Williams, CN; Rignot, E; An, L; Arndt, JE; Bamber, JL; et al.(2017). BedMachine v3: Complete Bed Topography and Ocean Bathymetry Mapping of Greenland From Multibeam Echo Sounding Combined With Mass Conservation. GEOPHYSICAL RESEARCH LETTERS, 44(21), 11051 - 11061. doi:10.1002/2017GL074954. UC Irvine: Retrieved from: http://www.escholarship.org/uc/item/4t89q4g7 |
op_relation |
qt4t89q4g7 http://www.escholarship.org/uc/item/4t89q4g7 |
op_rights |
Attribution (CC BY): http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/2017GL074954 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
21 |
_version_ |
1766011920155934720 |