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 the motion of ice sheets, the ocean circulation by freshwater discharge, as well as marginal lakes and rivers. For modelling this system a porous medium model has been developed, representing a confined-unconfined aquifer system (CUAS) with evolving transmi...
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ftcopernicus:oai:publications.copernicus.org:gmdd108600 2023-05-15T16:29:10+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 2023-01-23 application/pdf https://doi.org/10.5194/gmd-2022-312 https://gmd.copernicus.org/preprints/gmd-2022-312/ eng eng doi:10.5194/gmd-2022-312 https://gmd.copernicus.org/preprints/gmd-2022-312/ eISSN: 1991-9603 Text 2023 ftcopernicus https://doi.org/10.5194/gmd-2022-312 2023-01-30T17:22:43Z The subglacial hydrological system affects the motion of ice sheets, the ocean circulation by freshwater discharge, as well as marginal lakes and rivers. For modelling this system a porous medium model has been developed, representing a confined-unconfined aquifer system (CUAS) with evolving transmissivity. To allow for realistic simulations, we developed CUAS-MPI, an MPI-parallel C/C++ implementation, which employs the PETSc infrastructure for handling grids and equation systems. We describe the CUAS model and our software design and validate the numerical result of a pumping test using5 analytical solutions. 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. Our measurements show that CUAS-MPI reaches a throughput comparable to the throughput of ice sheet simulations, e.g. the Ice-sheet and Sea-level System Model (ISSM). Lastly, we discuss opportunities for ice-sheet modelling, future coupling possibilities of CUAS-MPI with other simulations, and consider throughput bottlenecks and limits of further scaling. Text Greenland Ice Sheet Copernicus Publications: E-Journals Greenland |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
The subglacial hydrological system affects the motion of ice sheets, the ocean circulation by freshwater discharge, as well as marginal lakes and rivers. For modelling this system a porous medium model has been developed, representing a confined-unconfined aquifer system (CUAS) with evolving transmissivity. To allow for realistic simulations, we developed CUAS-MPI, an MPI-parallel C/C++ implementation, which employs the PETSc infrastructure for handling grids and equation systems. We describe the CUAS model and our software design and validate the numerical result of a pumping test using5 analytical solutions. 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. Our measurements show that CUAS-MPI reaches a throughput comparable to the throughput of ice sheet simulations, e.g. the Ice-sheet and Sea-level System Model (ISSM). Lastly, we discuss opportunities for ice-sheet modelling, future coupling possibilities of CUAS-MPI with other simulations, and consider throughput bottlenecks and limits of further scaling. |
format |
Text |
author |
Fischler, Yannic Kleiner, Thomas Bischof, Christian Schmiedel, Jeremie Sayag, Roiy Emunds, Raban Oestreich, Lennart Frederik Humbert, Angelika |
spellingShingle |
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) |
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) |
publishDate |
2023 |
url |
https://doi.org/10.5194/gmd-2022-312 https://gmd.copernicus.org/preprints/gmd-2022-312/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
eISSN: 1991-9603 |
op_relation |
doi:10.5194/gmd-2022-312 https://gmd.copernicus.org/preprints/gmd-2022-312/ |
op_doi |
https://doi.org/10.5194/gmd-2022-312 |
_version_ |
1766018859879366656 |