PISM-LakeCC: Implementing an adaptive proglacial lake boundary in an ice sheet model
During the Late Pleistocene and Holocene retreat of paleo-ice sheets in North America and Europe, vast proglacial lakes existed along the land terminating margins. These proglacial lakes impacted ice sheet dynamics by imposing boundary conditions analogous to a marine terminating margin. Such lacust...
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ftawi:oai:epic.awi.de:56021 2024-09-15T18:11:03+00:00 PISM-LakeCC: Implementing an adaptive proglacial lake boundary in an ice sheet model Hinck, Sebastian Gowan, Evan J. Zhang, Xu Lohmann, Gerrit 2022-03-14 https://epic.awi.de/id/eprint/56021/ https://doi.org/10.5194/tc-16-941-2022 https://hdl.handle.net/10013/epic.e739ac72-16a1-4ef1-90f6-a20fd12ade2b unknown Copernicus Publications Hinck, S. orcid:0000-0002-6428-305X , Gowan, E. J. orcid:0000-0002-0119-9440 , Zhang, X. orcid:0000-0003-1833-9689 and Lohmann, G. orcid:0000-0003-2089-733X (2022) PISM-LakeCC: Implementing an adaptive proglacial lake boundary in an ice sheet model , The Cryosphere, 16 (3), pp. 941-965 . doi:10.5194/tc-16-941-2022 <https://doi.org/10.5194/tc-16-941-2022> , hdl:10013/epic.e739ac72-16a1-4ef1-90f6-a20fd12ade2b EPIC3The Cryosphere, Copernicus Publications, 16(3), pp. 941-965, ISSN: 1994-0424 Article isiRev 2022 ftawi https://doi.org/10.5194/tc-16-941-2022 2024-06-24T04:28:46Z During the Late Pleistocene and Holocene retreat of paleo-ice sheets in North America and Europe, vast proglacial lakes existed along the land terminating margins. These proglacial lakes impacted ice sheet dynamics by imposing boundary conditions analogous to a marine terminating margin. Such lacustrine boundary conditions cause changes in the ice sheet geometry, stress balance and frontal ablation and therefore affect the mass balance of the entire ice sheet. Despite this, dynamically evolving proglacial lakes have rarely been considered in detail in ice sheet modeling endeavors. In this study, we describe the implementation of an adaptive lake boundary in the Parallel Ice Sheet Model (PISM), which we call PISM-LakeCC. We test our model with a simplified glacial retreat setup of the Laurentide Ice Sheet (LIS). By comparing the experiments with lakes to control runs with no lakes, we show that the presence of proglacial lakes locally enhances the ice flow, which leads to a lowering of the ice sheet surface. In some cases, this also results in an advance of the ice margin and the emergence of ice lobes. In the warming climate, increased melting on the lowered ice surface drives the glacial retreat. For the LIS, the presence of lakes triggers a process similar to marine ice sheet instability, which caused the collapse of the ice saddle over Hudson Bay. In the control experiments without lakes, Hudson Bay is still glaciated when the climate reaches present-day (PD) conditions. The results of our study demonstrate that glacio-lacustrine interactions play a significant role in the retreat of land terminating ice sheet margins. Article in Journal/Newspaper Hudson Bay Ice Sheet The Cryosphere Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) The Cryosphere 16 3 941 965 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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description |
During the Late Pleistocene and Holocene retreat of paleo-ice sheets in North America and Europe, vast proglacial lakes existed along the land terminating margins. These proglacial lakes impacted ice sheet dynamics by imposing boundary conditions analogous to a marine terminating margin. Such lacustrine boundary conditions cause changes in the ice sheet geometry, stress balance and frontal ablation and therefore affect the mass balance of the entire ice sheet. Despite this, dynamically evolving proglacial lakes have rarely been considered in detail in ice sheet modeling endeavors. In this study, we describe the implementation of an adaptive lake boundary in the Parallel Ice Sheet Model (PISM), which we call PISM-LakeCC. We test our model with a simplified glacial retreat setup of the Laurentide Ice Sheet (LIS). By comparing the experiments with lakes to control runs with no lakes, we show that the presence of proglacial lakes locally enhances the ice flow, which leads to a lowering of the ice sheet surface. In some cases, this also results in an advance of the ice margin and the emergence of ice lobes. In the warming climate, increased melting on the lowered ice surface drives the glacial retreat. For the LIS, the presence of lakes triggers a process similar to marine ice sheet instability, which caused the collapse of the ice saddle over Hudson Bay. In the control experiments without lakes, Hudson Bay is still glaciated when the climate reaches present-day (PD) conditions. The results of our study demonstrate that glacio-lacustrine interactions play a significant role in the retreat of land terminating ice sheet margins. |
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 in 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 in an ice sheet model |
title_short |
PISM-LakeCC: Implementing an adaptive proglacial lake boundary in an ice sheet model |
title_full |
PISM-LakeCC: Implementing an adaptive proglacial lake boundary in an ice sheet model |
title_fullStr |
PISM-LakeCC: Implementing an adaptive proglacial lake boundary in an ice sheet model |
title_full_unstemmed |
PISM-LakeCC: Implementing an adaptive proglacial lake boundary in an ice sheet model |
title_sort |
pism-lakecc: implementing an adaptive proglacial lake boundary in an ice sheet model |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://epic.awi.de/id/eprint/56021/ https://doi.org/10.5194/tc-16-941-2022 https://hdl.handle.net/10013/epic.e739ac72-16a1-4ef1-90f6-a20fd12ade2b |
genre |
Hudson Bay Ice Sheet The Cryosphere |
genre_facet |
Hudson Bay Ice Sheet The Cryosphere |
op_source |
EPIC3The Cryosphere, Copernicus Publications, 16(3), pp. 941-965, ISSN: 1994-0424 |
op_relation |
Hinck, S. orcid:0000-0002-6428-305X , Gowan, E. J. orcid:0000-0002-0119-9440 , Zhang, X. orcid:0000-0003-1833-9689 and Lohmann, G. orcid:0000-0003-2089-733X (2022) PISM-LakeCC: Implementing an adaptive proglacial lake boundary in an ice sheet model , The Cryosphere, 16 (3), pp. 941-965 . doi:10.5194/tc-16-941-2022 <https://doi.org/10.5194/tc-16-941-2022> , hdl:10013/epic.e739ac72-16a1-4ef1-90f6-a20fd12ade2b |
op_doi |
https://doi.org/10.5194/tc-16-941-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
3 |
container_start_page |
941 |
op_container_end_page |
965 |
_version_ |
1810448645988810752 |