PISM-LakeCC: Implementing an adaptive proglacial lake boundary into an ice sheet model
Geological records show that vast proglacial lakes existed along the land terminating margins of palaeo ice sheets in Europe and North America. Proglacial lakes impact ice sheet dynamics by imposing marine-like boundary conditions at the ice margin. These lacustrine boundary conditions include chang...
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Copernicus Publications (EGU)
2020
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ftoceanrep:oai:oceanrep.geomar.de:55496 2023-05-15T16:35:22+02:00 PISM-LakeCC: Implementing an adaptive proglacial lake boundary into an ice sheet model Hinck, Sebastian Gowan, Evan J. Zhang, Xu Lohmann, Gerrit 2020-12-16 text https://oceanrep.geomar.de/id/eprint/55496/ https://oceanrep.geomar.de/id/eprint/55496/1/tc-2020-353.pdf https://oceanrep.geomar.de/id/eprint/55496/2/tc-2020-353-supplement.pdf https://doi.org/10.5194/tc-2020-353 en eng Copernicus Publications (EGU) https://oceanrep.geomar.de/id/eprint/55496/1/tc-2020-353.pdf https://oceanrep.geomar.de/id/eprint/55496/2/tc-2020-353-supplement.pdf Hinck, S., Gowan, E. J., Zhang, X. and Lohmann, G. (Submitted) PISM-LakeCC: Implementing an adaptive proglacial lake boundary into an ice sheet model. Open Access The Cryosphere . DOI 10.5194/tc-2020-353 <https://doi.org/10.5194/tc-2020-353>. doi:10.5194/tc-2020-353 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2020 ftoceanrep https://doi.org/10.5194/tc-2020-353 2023-04-07T16:01:26Z Geological records show that vast proglacial lakes existed along the land terminating margins of palaeo ice sheets in Europe and North America. Proglacial lakes impact ice sheet dynamics by imposing marine-like boundary conditions at the ice margin. These lacustrine boundary conditions include changes in the ice sheet’s geometry, stress balance and frontal ablation and therefore affect the entire ice sheet’s mass balance. This interaction, however, has not been rigorously implemented in ice sheet models. In this study, the implementation of an adaptive lake boundary into the Parallel Ice Sheet Model (PISM) is described and applied to the glacial retreat of the Laurentide Ice Sheet (LIS). The results show that the presence of proglacial lakes locally enhances the ice flow. Along the continental ice margin, ice streams and ice lobes can be observed. Lacustrine terminating ice streams cause immense thinning of the ice sheet’s interior and thus play a significant role in the demise of the LIS. Due to the presence of lakes, a process similar to the marine ice sheet instability causes the collapse of the ice saddle over Hudson Bay, which blocked drainage via the Hudson Strait. In control experiments without a lake model, Hudson Bay is still glaciated at the end of the simulation. Future studies should target the development of parametrizations that better describe the glacial-lacustrine interactions. Article in Journal/Newspaper Hudson Bay Hudson Strait Ice Sheet The Cryosphere OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Hudson Hudson Bay Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Geological records show that vast proglacial lakes existed along the land terminating margins of palaeo ice sheets in Europe and North America. Proglacial lakes impact ice sheet dynamics by imposing marine-like boundary conditions at the ice margin. These lacustrine boundary conditions include changes in the ice sheet’s geometry, stress balance and frontal ablation and therefore affect the entire ice sheet’s mass balance. This interaction, however, has not been rigorously implemented in ice sheet models. In this study, the implementation of an adaptive lake boundary into the Parallel Ice Sheet Model (PISM) is described and applied to the glacial retreat of the Laurentide Ice Sheet (LIS). The results show that the presence of proglacial lakes locally enhances the ice flow. Along the continental ice margin, ice streams and ice lobes can be observed. Lacustrine terminating ice streams cause immense thinning of the ice sheet’s interior and thus play a significant role in the demise of the LIS. Due to the presence of lakes, a process similar to the marine ice sheet instability causes the collapse of the ice saddle over Hudson Bay, which blocked drainage via the Hudson Strait. In control experiments without a lake model, Hudson Bay is still glaciated at the end of the simulation. Future studies should target the development of parametrizations that better describe the glacial-lacustrine interactions. |
format |
Article in Journal/Newspaper |
author |
Hinck, Sebastian Gowan, Evan J. Zhang, Xu Lohmann, Gerrit |
spellingShingle |
Hinck, Sebastian Gowan, Evan J. Zhang, Xu Lohmann, Gerrit PISM-LakeCC: Implementing an adaptive proglacial lake boundary into an ice sheet model |
author_facet |
Hinck, Sebastian Gowan, Evan J. Zhang, Xu Lohmann, Gerrit |
author_sort |
Hinck, Sebastian |
title |
PISM-LakeCC: Implementing an adaptive proglacial lake boundary into an ice sheet model |
title_short |
PISM-LakeCC: Implementing an adaptive proglacial lake boundary into an ice sheet model |
title_full |
PISM-LakeCC: Implementing an adaptive proglacial lake boundary into an ice sheet model |
title_fullStr |
PISM-LakeCC: Implementing an adaptive proglacial lake boundary into an ice sheet model |
title_full_unstemmed |
PISM-LakeCC: Implementing an adaptive proglacial lake boundary into an ice sheet model |
title_sort |
pism-lakecc: implementing an adaptive proglacial lake boundary into an ice sheet model |
publisher |
Copernicus Publications (EGU) |
publishDate |
2020 |
url |
https://oceanrep.geomar.de/id/eprint/55496/ https://oceanrep.geomar.de/id/eprint/55496/1/tc-2020-353.pdf https://oceanrep.geomar.de/id/eprint/55496/2/tc-2020-353-supplement.pdf https://doi.org/10.5194/tc-2020-353 |
long_lat |
ENVELOPE(-70.000,-70.000,62.000,62.000) |
geographic |
Hudson Hudson Bay Hudson Strait |
geographic_facet |
Hudson Hudson Bay Hudson Strait |
genre |
Hudson Bay Hudson Strait Ice Sheet The Cryosphere |
genre_facet |
Hudson Bay Hudson Strait Ice Sheet The Cryosphere |
op_relation |
https://oceanrep.geomar.de/id/eprint/55496/1/tc-2020-353.pdf https://oceanrep.geomar.de/id/eprint/55496/2/tc-2020-353-supplement.pdf Hinck, S., Gowan, E. J., Zhang, X. and Lohmann, G. (Submitted) PISM-LakeCC: Implementing an adaptive proglacial lake boundary into an ice sheet model. Open Access The Cryosphere . DOI 10.5194/tc-2020-353 <https://doi.org/10.5194/tc-2020-353>. doi:10.5194/tc-2020-353 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-2020-353 |
_version_ |
1766025589597143040 |