The Potsdam Parallel Ice Sheet Model (PISM-PIK) – Part 2: Dynamic equilibrium simulation of the Antarctic ice sheet
We present a dynamic equilibrium simulation of the ice sheet-shelf system on Antarctica with the Potsdam Parallel Ice Sheet Model (PISM-PIK). The simulation is initialized with present-day conditions for bed topography and ice thickness and then run to steady state with constant present-day surface...
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Online Access: | https://doi.org/10.5194/tc-5-727-2011 https://tc.copernicus.org/articles/5/727/2011/ |
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ftcopernicus:oai:publications.copernicus.org:tc8267 2023-05-15T13:36:36+02:00 The Potsdam Parallel Ice Sheet Model (PISM-PIK) – Part 2: Dynamic equilibrium simulation of the Antarctic ice sheet Martin, M. A. Winkelmann, R. Haseloff, M. Albrecht, T. Bueler, E. Khroulev, C. Levermann, A. 2018-09-27 application/pdf https://doi.org/10.5194/tc-5-727-2011 https://tc.copernicus.org/articles/5/727/2011/ eng eng doi:10.5194/tc-5-727-2011 https://tc.copernicus.org/articles/5/727/2011/ eISSN: 1994-0424 Text 2018 ftcopernicus https://doi.org/10.5194/tc-5-727-2011 2020-07-20T16:26:02Z We present a dynamic equilibrium simulation of the ice sheet-shelf system on Antarctica with the Potsdam Parallel Ice Sheet Model (PISM-PIK). The simulation is initialized with present-day conditions for bed topography and ice thickness and then run to steady state with constant present-day surface mass balance. Surface temperature and sub-shelf basal melt distribution are parameterized. Grounding lines and calving fronts are free to evolve, and their modeled equilibrium state is compared to observational data. A physically-motivated calving law based on horizontal spreading rates allows for realistic calving fronts for various types of shelves. Steady-state dynamics including surface velocity and ice flux are analyzed for whole Antarctica and the Ronne-Filchner and Ross ice shelf areas in particular. The results show that the different flow regimes in sheet and shelves, and the transition zone between them, are captured reasonably well, supporting the approach of superposition of SIA and SSA for the representation of fast motion of grounded ice. This approach also leads to a natural emergence of sliding-dominated flow in stream-like features in this new 3-D marine ice sheet model. Text Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Ross Ice Shelf Copernicus Publications: E-Journals Antarctic Pik ENVELOPE(67.200,67.200,-70.783,-70.783) Ross Ice Shelf The Antarctic The Cryosphere 5 3 727 740 |
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Open Polar |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
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English |
description |
We present a dynamic equilibrium simulation of the ice sheet-shelf system on Antarctica with the Potsdam Parallel Ice Sheet Model (PISM-PIK). The simulation is initialized with present-day conditions for bed topography and ice thickness and then run to steady state with constant present-day surface mass balance. Surface temperature and sub-shelf basal melt distribution are parameterized. Grounding lines and calving fronts are free to evolve, and their modeled equilibrium state is compared to observational data. A physically-motivated calving law based on horizontal spreading rates allows for realistic calving fronts for various types of shelves. Steady-state dynamics including surface velocity and ice flux are analyzed for whole Antarctica and the Ronne-Filchner and Ross ice shelf areas in particular. The results show that the different flow regimes in sheet and shelves, and the transition zone between them, are captured reasonably well, supporting the approach of superposition of SIA and SSA for the representation of fast motion of grounded ice. This approach also leads to a natural emergence of sliding-dominated flow in stream-like features in this new 3-D marine ice sheet model. |
format |
Text |
author |
Martin, M. A. Winkelmann, R. Haseloff, M. Albrecht, T. Bueler, E. Khroulev, C. Levermann, A. |
spellingShingle |
Martin, M. A. Winkelmann, R. Haseloff, M. Albrecht, T. Bueler, E. Khroulev, C. Levermann, A. The Potsdam Parallel Ice Sheet Model (PISM-PIK) – Part 2: Dynamic equilibrium simulation of the Antarctic ice sheet |
author_facet |
Martin, M. A. Winkelmann, R. Haseloff, M. Albrecht, T. Bueler, E. Khroulev, C. Levermann, A. |
author_sort |
Martin, M. A. |
title |
The Potsdam Parallel Ice Sheet Model (PISM-PIK) – Part 2: Dynamic equilibrium simulation of the Antarctic ice sheet |
title_short |
The Potsdam Parallel Ice Sheet Model (PISM-PIK) – Part 2: Dynamic equilibrium simulation of the Antarctic ice sheet |
title_full |
The Potsdam Parallel Ice Sheet Model (PISM-PIK) – Part 2: Dynamic equilibrium simulation of the Antarctic ice sheet |
title_fullStr |
The Potsdam Parallel Ice Sheet Model (PISM-PIK) – Part 2: Dynamic equilibrium simulation of the Antarctic ice sheet |
title_full_unstemmed |
The Potsdam Parallel Ice Sheet Model (PISM-PIK) – Part 2: Dynamic equilibrium simulation of the Antarctic ice sheet |
title_sort |
potsdam parallel ice sheet model (pism-pik) – part 2: dynamic equilibrium simulation of the antarctic ice sheet |
publishDate |
2018 |
url |
https://doi.org/10.5194/tc-5-727-2011 https://tc.copernicus.org/articles/5/727/2011/ |
long_lat |
ENVELOPE(67.200,67.200,-70.783,-70.783) |
geographic |
Antarctic Pik Ross Ice Shelf The Antarctic |
geographic_facet |
Antarctic Pik Ross Ice Shelf The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Ross Ice Shelf |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelf Ross Ice Shelf |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-5-727-2011 https://tc.copernicus.org/articles/5/727/2011/ |
op_doi |
https://doi.org/10.5194/tc-5-727-2011 |
container_title |
The Cryosphere |
container_volume |
5 |
container_issue |
3 |
container_start_page |
727 |
op_container_end_page |
740 |
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1766081275945287680 |