A two-dimensional glacier–fjord coupled model applied to estimate submarine melt rates and front position changes of Hansbreen, Svalbard
We have developed a two-dimensional coupled glacier–fjord model, which runs automatically using Elmer/Ice and MITgcm software packages, to investigate the magnitude of submarine melting along a vertical glacier front and its potential influence on glacier calving and front position changes. We apply...
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Cambridge University Press
2018
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Online Access: | https://doi.org/10.1017/jog.2018.61 https://doaj.org/article/03d3922855b944f6a86739da23a22e85 |
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ftdoajarticles:oai:doaj.org/article:03d3922855b944f6a86739da23a22e85 2023-05-15T16:22:09+02:00 A two-dimensional glacier–fjord coupled model applied to estimate submarine melt rates and front position changes of Hansbreen, Svalbard E. DE ANDRÉS J. OTERO F. NAVARRO A. PROMIŃSKA J. LAPAZARAN W. WALCZOWSKI 2018-10-01T00:00:00Z https://doi.org/10.1017/jog.2018.61 https://doaj.org/article/03d3922855b944f6a86739da23a22e85 EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143018000618/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2018.61 0022-1430 1727-5652 https://doaj.org/article/03d3922855b944f6a86739da23a22e85 Journal of Glaciology, Vol 64, Pp 745-758 (2018) glacier ablation phenomena glacier calving glacier modeling ice/ocean interactions Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2018 ftdoajarticles https://doi.org/10.1017/jog.2018.61 2023-03-12T01:30:59Z We have developed a two-dimensional coupled glacier–fjord model, which runs automatically using Elmer/Ice and MITgcm software packages, to investigate the magnitude of submarine melting along a vertical glacier front and its potential influence on glacier calving and front position changes. We apply this model to simulate the Hansbreen glacier–Hansbukta proglacial–fjord system, Southwestern Svalbard, during the summer of 2010. The limited size of this system allows us to resolve some of the small-scale processes occurring at the ice–ocean interface in the fjord model, using a 0.5 s time step and a 1 m grid resolution near the glacier front. We use a rich set of field data spanning the period April–August 2010 to constrain, calibrate and validate the model. We adjust circulation patterns in the fjord by tuning subglacial discharge inputs that best match observed temperature while maintaining a compromise with observed salinity, suggesting a convectively driven circulation in Hansbukta. The results of our model simulations suggest that both submarine melting and crevasse hydrofracturing exert important controls on seasonal frontal ablation, with submarine melting alone not being sufficient for reproducing the observed patterns of seasonal retreat. Both submarine melt and calving rates accumulated along the entire simulation period are of the same order of magnitude, ~100 m. The model results also indicate that changes in submarine melting lag meltwater production by 4–5 weeks, which suggests that it may take up to a month for meltwater to traverse the englacial and subglacial drainage network. Article in Journal/Newspaper glacier Journal of Glaciology Svalbard Directory of Open Access Journals: DOAJ Articles Svalbard Hansbreen ENVELOPE(15.650,15.650,77.075,77.075) Journal of Glaciology 64 247 745 758 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
glacier ablation phenomena glacier calving glacier modeling ice/ocean interactions Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
glacier ablation phenomena glacier calving glacier modeling ice/ocean interactions Environmental sciences GE1-350 Meteorology. Climatology QC851-999 E. DE ANDRÉS J. OTERO F. NAVARRO A. PROMIŃSKA J. LAPAZARAN W. WALCZOWSKI A two-dimensional glacier–fjord coupled model applied to estimate submarine melt rates and front position changes of Hansbreen, Svalbard |
topic_facet |
glacier ablation phenomena glacier calving glacier modeling ice/ocean interactions Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
We have developed a two-dimensional coupled glacier–fjord model, which runs automatically using Elmer/Ice and MITgcm software packages, to investigate the magnitude of submarine melting along a vertical glacier front and its potential influence on glacier calving and front position changes. We apply this model to simulate the Hansbreen glacier–Hansbukta proglacial–fjord system, Southwestern Svalbard, during the summer of 2010. The limited size of this system allows us to resolve some of the small-scale processes occurring at the ice–ocean interface in the fjord model, using a 0.5 s time step and a 1 m grid resolution near the glacier front. We use a rich set of field data spanning the period April–August 2010 to constrain, calibrate and validate the model. We adjust circulation patterns in the fjord by tuning subglacial discharge inputs that best match observed temperature while maintaining a compromise with observed salinity, suggesting a convectively driven circulation in Hansbukta. The results of our model simulations suggest that both submarine melting and crevasse hydrofracturing exert important controls on seasonal frontal ablation, with submarine melting alone not being sufficient for reproducing the observed patterns of seasonal retreat. Both submarine melt and calving rates accumulated along the entire simulation period are of the same order of magnitude, ~100 m. The model results also indicate that changes in submarine melting lag meltwater production by 4–5 weeks, which suggests that it may take up to a month for meltwater to traverse the englacial and subglacial drainage network. |
format |
Article in Journal/Newspaper |
author |
E. DE ANDRÉS J. OTERO F. NAVARRO A. PROMIŃSKA J. LAPAZARAN W. WALCZOWSKI |
author_facet |
E. DE ANDRÉS J. OTERO F. NAVARRO A. PROMIŃSKA J. LAPAZARAN W. WALCZOWSKI |
author_sort |
E. DE ANDRÉS |
title |
A two-dimensional glacier–fjord coupled model applied to estimate submarine melt rates and front position changes of Hansbreen, Svalbard |
title_short |
A two-dimensional glacier–fjord coupled model applied to estimate submarine melt rates and front position changes of Hansbreen, Svalbard |
title_full |
A two-dimensional glacier–fjord coupled model applied to estimate submarine melt rates and front position changes of Hansbreen, Svalbard |
title_fullStr |
A two-dimensional glacier–fjord coupled model applied to estimate submarine melt rates and front position changes of Hansbreen, Svalbard |
title_full_unstemmed |
A two-dimensional glacier–fjord coupled model applied to estimate submarine melt rates and front position changes of Hansbreen, Svalbard |
title_sort |
two-dimensional glacier–fjord coupled model applied to estimate submarine melt rates and front position changes of hansbreen, svalbard |
publisher |
Cambridge University Press |
publishDate |
2018 |
url |
https://doi.org/10.1017/jog.2018.61 https://doaj.org/article/03d3922855b944f6a86739da23a22e85 |
long_lat |
ENVELOPE(15.650,15.650,77.075,77.075) |
geographic |
Svalbard Hansbreen |
geographic_facet |
Svalbard Hansbreen |
genre |
glacier Journal of Glaciology Svalbard |
genre_facet |
glacier Journal of Glaciology Svalbard |
op_source |
Journal of Glaciology, Vol 64, Pp 745-758 (2018) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143018000618/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2018.61 0022-1430 1727-5652 https://doaj.org/article/03d3922855b944f6a86739da23a22e85 |
op_doi |
https://doi.org/10.1017/jog.2018.61 |
container_title |
Journal of Glaciology |
container_volume |
64 |
container_issue |
247 |
container_start_page |
745 |
op_container_end_page |
758 |
_version_ |
1766010124611092480 |