A parallel implementation of the confined–unconfined aquifer system model for subglacial hydrology: design, verification, and performance analysis (CUAS-MPI v0.1.0)
The subglacial hydrological system affects (i) the motion of ice sheets through sliding, (ii) the location of lakes at the ice margin, and (iii) the ocean circulation by freshwater discharge directly at the grounding line or (iv) via rivers flowing over land. For modeling this hydrology system, a pr...
Published in: | Geoscientific Model Development |
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Language: | English |
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Copernicus Publications
2023
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00068874 2023-10-09T21:52:02+02:00 A parallel implementation of the confined–unconfined aquifer system model for subglacial hydrology: design, verification, and performance analysis (CUAS-MPI v0.1.0) Fischler, Yannic Kleiner, Thomas Bischof, Christian Schmiedel, Jeremie Sayag, Roiy Emunds, Raban Oestreich, Lennart Frederik Humbert, Angelika 2023-09 electronic https://doi.org/10.5194/gmd-16-5305-2023 https://noa.gwlb.de/receive/cop_mods_00068874 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067286/gmd-16-5305-2023.pdf https://gmd.copernicus.org/articles/16/5305/2023/gmd-16-5305-2023.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-16-5305-2023 https://noa.gwlb.de/receive/cop_mods_00068874 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067286/gmd-16-5305-2023.pdf https://gmd.copernicus.org/articles/16/5305/2023/gmd-16-5305-2023.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/gmd-16-5305-2023 2023-09-17T23:34:49Z The subglacial hydrological system affects (i) the motion of ice sheets through sliding, (ii) the location of lakes at the ice margin, and (iii) the ocean circulation by freshwater discharge directly at the grounding line or (iv) via rivers flowing over land. For modeling this hydrology system, a previously developed porous-media concept called the confined–unconfined aquifer system (CUAS) is used. To allow for realistic simulations at the ice sheet scale, we developed CUAS-MPI, an MPI-parallel C/C++ implementation of CUAS (MPI: Message Passing Interface), which employs the Portable, Extensible Toolkit for Scientific Computation (PETSc) infrastructure for handling grids and equation systems. We validate the accuracy of the numerical results by comparing them with a set of analytical solutions to the model equations, which involve two types of boundary conditions. We then investigate the scaling behavior of CUAS-MPI and show that CUAS-MPI scales up to 3840 MPI processes running a realistic Greenland setup on the Lichtenberg HPC system. Our measurements also show that CUAS-MPI reaches a throughput comparable to that of ice sheet simulations, e.g., the Ice-sheet and Sea-level System Model (ISSM). Lastly, we discuss opportunities for ice sheet modeling, explore future coupling possibilities of CUAS-MPI with other simulations, and consider throughput bottlenecks and limits of further scaling. Article in Journal/Newspaper Greenland Ice Sheet Niedersächsisches Online-Archiv NOA Greenland Geoscientific Model Development 16 18 5305 5322 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Fischler, Yannic Kleiner, Thomas Bischof, Christian Schmiedel, Jeremie Sayag, Roiy Emunds, Raban Oestreich, Lennart Frederik Humbert, Angelika A parallel implementation of the confined–unconfined aquifer system model for subglacial hydrology: design, verification, and performance analysis (CUAS-MPI v0.1.0) |
topic_facet |
article Verlagsveröffentlichung |
description |
The subglacial hydrological system affects (i) the motion of ice sheets through sliding, (ii) the location of lakes at the ice margin, and (iii) the ocean circulation by freshwater discharge directly at the grounding line or (iv) via rivers flowing over land. For modeling this hydrology system, a previously developed porous-media concept called the confined–unconfined aquifer system (CUAS) is used. To allow for realistic simulations at the ice sheet scale, we developed CUAS-MPI, an MPI-parallel C/C++ implementation of CUAS (MPI: Message Passing Interface), which employs the Portable, Extensible Toolkit for Scientific Computation (PETSc) infrastructure for handling grids and equation systems. We validate the accuracy of the numerical results by comparing them with a set of analytical solutions to the model equations, which involve two types of boundary conditions. We then investigate the scaling behavior of CUAS-MPI and show that CUAS-MPI scales up to 3840 MPI processes running a realistic Greenland setup on the Lichtenberg HPC system. Our measurements also show that CUAS-MPI reaches a throughput comparable to that of ice sheet simulations, e.g., the Ice-sheet and Sea-level System Model (ISSM). Lastly, we discuss opportunities for ice sheet modeling, explore future coupling possibilities of CUAS-MPI with other simulations, and consider throughput bottlenecks and limits of further scaling. |
format |
Article in Journal/Newspaper |
author |
Fischler, Yannic Kleiner, Thomas Bischof, Christian Schmiedel, Jeremie Sayag, Roiy Emunds, Raban Oestreich, Lennart Frederik Humbert, Angelika |
author_facet |
Fischler, Yannic Kleiner, Thomas Bischof, Christian Schmiedel, Jeremie Sayag, Roiy Emunds, Raban Oestreich, Lennart Frederik Humbert, Angelika |
author_sort |
Fischler, Yannic |
title |
A parallel implementation of the confined–unconfined aquifer system model for subglacial hydrology: design, verification, and performance analysis (CUAS-MPI v0.1.0) |
title_short |
A parallel implementation of the confined–unconfined aquifer system model for subglacial hydrology: design, verification, and performance analysis (CUAS-MPI v0.1.0) |
title_full |
A parallel implementation of the confined–unconfined aquifer system model for subglacial hydrology: design, verification, and performance analysis (CUAS-MPI v0.1.0) |
title_fullStr |
A parallel implementation of the confined–unconfined aquifer system model for subglacial hydrology: design, verification, and performance analysis (CUAS-MPI v0.1.0) |
title_full_unstemmed |
A parallel implementation of the confined–unconfined aquifer system model for subglacial hydrology: design, verification, and performance analysis (CUAS-MPI v0.1.0) |
title_sort |
parallel implementation of the confined–unconfined aquifer system model for subglacial hydrology: design, verification, and performance analysis (cuas-mpi v0.1.0) |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/gmd-16-5305-2023 https://noa.gwlb.de/receive/cop_mods_00068874 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067286/gmd-16-5305-2023.pdf https://gmd.copernicus.org/articles/16/5305/2023/gmd-16-5305-2023.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland 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-16-5305-2023 https://noa.gwlb.de/receive/cop_mods_00068874 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00067286/gmd-16-5305-2023.pdf https://gmd.copernicus.org/articles/16/5305/2023/gmd-16-5305-2023.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/gmd-16-5305-2023 |
container_title |
Geoscientific Model Development |
container_volume |
16 |
container_issue |
18 |
container_start_page |
5305 |
op_container_end_page |
5322 |
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1779315163081474048 |