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Título: | Basal Crevasse Formation on Byrd Glacier, East Antarctica, as Proxy for Past Subglacial Flooding Events |
Autor: | Child, Sarah F.; Stearns, Leigh A.; van der Veen, C.J.; Elosegui, Pedro CSIC ORCID | Fecha de publicación: | ago-2021 | Editor: | American Geophysical Union | Citación: | Geophysical Research Letters 48(15): e2020GL090978 (2021) | Resumen: | Linear elastic fracture mechanics suggests that short-lived flow accelerations, such as the one initiated by a flooding event beneath Byrd Glacier in 2006, can form abnormally large basal crevasses at the grounding line. Airborne radar measurements acquired in 2011 reveal hundreds of basal crevasses ranging in height from urn:x-wiley:00948276:media:grl62752-math-000140–335 m. Particle tracking results show that formation of the largest basal crevasse occurred at the grounding line during the 2006 flooding event. Very large basal crevasses form distinctive surface depressions directly overhead, which are observed along the Byrd Glacier flowline to the terminus of the Ross Ice Shelf. By using these surface depressions as proxies for abnormally large basal crevasses, we create a timeline of past subglacial flooding events on Byrd Glacier. Understanding the frequency of flooding events and their effect on glacier dynamics will help inform models of ice sheet stability and subglacial hydrology | Descripción: | 10 pages, 4 figures, supporting information https://doi.org/10.1029/2020GL090978.-- Data Availability Statement: The processed GPS data used in this study is available from Mendeley Data Repository: http://dx.doi.org/10.17632/2kk69m98fd.1. The raw GPS data will be made available via the National Science Foundation's US Antarctic Program Data Center. The gridded CReSIS products are available via https://data.cresis.ku.edu/data/grids/. The data is available through: http://data.pgc.umn.edu/elev/dem/setsm/REMA/geocell/v1.0/2m | Versión del editor: | https://doi.org/10.1029/2020GL090978 | URI: | http://hdl.handle.net/10261/250336 | DOI: | 10.1029/2020GL090978 | ISSN: | 0094-8276 | E-ISSN: | 1944-8007 |
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Child_et_al_2021.pdf | 1,58 MB | Adobe PDF | Visualizar/Abrir | |
Child_et_al_2021_suppl.pdf | 1,96 MB | Adobe PDF | Visualizar/Abrir |
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