SUHMO: an adaptive mesh refinement SUbglacial Hydrology MOdel v1.0
Water flowing under ice sheets and glaciers can have a strong influence on ice dynamics, particularly through pressure changes, suggesting that a comprehensive ice sheet model should include the effect of basal hydrology. Modeling subglacial hydrology remains a challenge, however, mainly due to the...
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00064491 2023-05-15T16:40:26+02:00 SUHMO: an adaptive mesh refinement SUbglacial Hydrology MOdel v1.0 Felden, Anne M. Martin, Daniel F. Ng, Esmond G. 2023-01 electronic https://doi.org/10.5194/gmd-16-407-2023 https://noa.gwlb.de/receive/cop_mods_00064491 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00063261/gmd-16-407-2023.pdf https://gmd.copernicus.org/articles/16/407/2023/gmd-16-407-2023.pdf eng eng Copernicus Publications Geoscientific Model Development -- http://www.bibliothek.uni-regensburg.de/ezeit/?2456725 -- http://www.geosci-model-dev.net/ -- 1991-9603 https://doi.org/10.5194/gmd-16-407-2023 https://noa.gwlb.de/receive/cop_mods_00064491 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00063261/gmd-16-407-2023.pdf https://gmd.copernicus.org/articles/16/407/2023/gmd-16-407-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess CC-BY article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/gmd-16-407-2023 2023-01-23T00:13:29Z Water flowing under ice sheets and glaciers can have a strong influence on ice dynamics, particularly through pressure changes, suggesting that a comprehensive ice sheet model should include the effect of basal hydrology. Modeling subglacial hydrology remains a challenge, however, mainly due to the range of spatial and temporal scales involved – from subglacial channels to vast subglacial lakes. Additionally, networks of subglacial drainage channels dynamically evolve over time. To address some of these challenges, we have developed an adaptive mesh refinement (AMR) model based on the Chombo software framework. We extend the model proposed by Sommers et al. (2018) with a small but significant change to accommodate the transition from unresolved to resolved flow features. We handle the strong nonlinearities present in the equations by resorting to an efficient nonlinear full approximation scheme multigrid (FAS-MG) algorithm. We outline the details of the algorithm and present convergence analysis results demonstrating its good performance. Additionally, we present results validating our approach, using test cases from the Subglacial Hydrology Model Intercomparison Project (SHMIP) (de Fleurian et al., 2018). We finish by presenting a more complex, 100 km-by-100 km synthetic test case with peaks and valleys that we use to investigate the effective pressure distribution as the number of AMR levels increases. These preliminary results suggest that a minimum spatial resolution is needed to properly capture channel features, but additional work is required to precisely quantify this and its impact on accurately modeling the coupled ice sheet–hydrology system. The efficiency of our approach, relying on localized refinement, is also demonstrated. Future work will include coupling the SUbglacial Hydrology MOdel (SUHMO) with the BISICLES AMR ice sheet model (Cornford et al., 2013), both built on the same numerical framework. Article in Journal/Newspaper Ice Sheet Niedersächsisches Online-Archiv NOA Handle The ENVELOPE(161.983,161.983,-78.000,-78.000) Sommers ENVELOPE(-63.550,-63.550,-65.067,-65.067) Geoscientific Model Development 16 1 407 425 |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Felden, Anne M. Martin, Daniel F. Ng, Esmond G. SUHMO: an adaptive mesh refinement SUbglacial Hydrology MOdel v1.0 |
topic_facet |
article Verlagsveröffentlichung |
description |
Water flowing under ice sheets and glaciers can have a strong influence on ice dynamics, particularly through pressure changes, suggesting that a comprehensive ice sheet model should include the effect of basal hydrology. Modeling subglacial hydrology remains a challenge, however, mainly due to the range of spatial and temporal scales involved – from subglacial channels to vast subglacial lakes. Additionally, networks of subglacial drainage channels dynamically evolve over time. To address some of these challenges, we have developed an adaptive mesh refinement (AMR) model based on the Chombo software framework. We extend the model proposed by Sommers et al. (2018) with a small but significant change to accommodate the transition from unresolved to resolved flow features. We handle the strong nonlinearities present in the equations by resorting to an efficient nonlinear full approximation scheme multigrid (FAS-MG) algorithm. We outline the details of the algorithm and present convergence analysis results demonstrating its good performance. Additionally, we present results validating our approach, using test cases from the Subglacial Hydrology Model Intercomparison Project (SHMIP) (de Fleurian et al., 2018). We finish by presenting a more complex, 100 km-by-100 km synthetic test case with peaks and valleys that we use to investigate the effective pressure distribution as the number of AMR levels increases. These preliminary results suggest that a minimum spatial resolution is needed to properly capture channel features, but additional work is required to precisely quantify this and its impact on accurately modeling the coupled ice sheet–hydrology system. The efficiency of our approach, relying on localized refinement, is also demonstrated. Future work will include coupling the SUbglacial Hydrology MOdel (SUHMO) with the BISICLES AMR ice sheet model (Cornford et al., 2013), both built on the same numerical framework. |
format |
Article in Journal/Newspaper |
author |
Felden, Anne M. Martin, Daniel F. Ng, Esmond G. |
author_facet |
Felden, Anne M. Martin, Daniel F. Ng, Esmond G. |
author_sort |
Felden, Anne M. |
title |
SUHMO: an adaptive mesh refinement SUbglacial Hydrology MOdel v1.0 |
title_short |
SUHMO: an adaptive mesh refinement SUbglacial Hydrology MOdel v1.0 |
title_full |
SUHMO: an adaptive mesh refinement SUbglacial Hydrology MOdel v1.0 |
title_fullStr |
SUHMO: an adaptive mesh refinement SUbglacial Hydrology MOdel v1.0 |
title_full_unstemmed |
SUHMO: an adaptive mesh refinement SUbglacial Hydrology MOdel v1.0 |
title_sort |
suhmo: an adaptive mesh refinement subglacial hydrology model v1.0 |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/gmd-16-407-2023 https://noa.gwlb.de/receive/cop_mods_00064491 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00063261/gmd-16-407-2023.pdf https://gmd.copernicus.org/articles/16/407/2023/gmd-16-407-2023.pdf |
long_lat |
ENVELOPE(161.983,161.983,-78.000,-78.000) ENVELOPE(-63.550,-63.550,-65.067,-65.067) |
geographic |
Handle The Sommers |
geographic_facet |
Handle The Sommers |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
Geoscientific Model Development -- http://www.bibliothek.uni-regensburg.de/ezeit/?2456725 -- http://www.geosci-model-dev.net/ -- 1991-9603 https://doi.org/10.5194/gmd-16-407-2023 https://noa.gwlb.de/receive/cop_mods_00064491 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00063261/gmd-16-407-2023.pdf https://gmd.copernicus.org/articles/16/407/2023/gmd-16-407-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/gmd-16-407-2023 |
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Geoscientific Model Development |
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1 |
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407 |
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425 |
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