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...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications (EGU)
2022
|
Subjects: | |
Online Access: | https://oceanrep.geomar.de/id/eprint/57204/ https://oceanrep.geomar.de/id/eprint/57204/1/tc-16-941-2022.pdf https://doi.org/10.5194/tc-16-941-2022 |
id |
ftoceanrep:oai:oceanrep.geomar.de:57204 |
---|---|
record_format |
openpolar |
spelling |
ftoceanrep:oai:oceanrep.geomar.de:57204 2023-08-27T04:09:53+02:00 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 text https://oceanrep.geomar.de/id/eprint/57204/ https://oceanrep.geomar.de/id/eprint/57204/1/tc-16-941-2022.pdf https://doi.org/10.5194/tc-16-941-2022 en eng Copernicus Publications (EGU) https://oceanrep.geomar.de/id/eprint/57204/1/tc-16-941-2022.pdf Hinck, S., Gowan, E. J., Zhang, X. and Lohmann, G. (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>. doi:10.5194/tc-16-941-2022 cc_by_4.0 info:eu-repo/semantics/closedAccess Article PeerReviewed 2022 ftoceanrep https://doi.org/10.5194/tc-16-941-2022 2023-08-06T23:19:54Z 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 OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Hudson Hudson Bay The Cryosphere 16 3 941 965 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
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 (EGU) |
publishDate |
2022 |
url |
https://oceanrep.geomar.de/id/eprint/57204/ https://oceanrep.geomar.de/id/eprint/57204/1/tc-16-941-2022.pdf https://doi.org/10.5194/tc-16-941-2022 |
geographic |
Hudson Hudson Bay |
geographic_facet |
Hudson Hudson Bay |
genre |
Hudson Bay Ice Sheet The Cryosphere |
genre_facet |
Hudson Bay Ice Sheet The Cryosphere |
op_relation |
https://oceanrep.geomar.de/id/eprint/57204/1/tc-16-941-2022.pdf Hinck, S., Gowan, E. J., Zhang, X. and Lohmann, G. (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>. doi:10.5194/tc-16-941-2022 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/closedAccess |
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_ |
1775351556175036416 |