OBLIMAP 2.0: a fast climate model–ice sheet model coupler including online embeddable mapping routines
This paper accompanies the second OBLIMAP open-source release. The package is developed to map climate fields between a general circulation model (GCM) and an ice sheet model (ISM) in both directions by using optimal aligned oblique projections, which minimize distortions. The curvature of the surfa...
Published in: | Geoscientific Model Development |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2016
|
Subjects: | |
Online Access: | https://doi.org/10.5194/gmd-9-4111-2016 https://doaj.org/article/dbe7b5637f5c41ee9017a535df1f1edf |
id |
ftdoajarticles:oai:doaj.org/article:dbe7b5637f5c41ee9017a535df1f1edf |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:dbe7b5637f5c41ee9017a535df1f1edf 2023-05-15T16:40:40+02:00 OBLIMAP 2.0: a fast climate model–ice sheet model coupler including online embeddable mapping routines T. J. Reerink W. J. van de Berg R. S. W. van de Wal 2016-11-01T00:00:00Z https://doi.org/10.5194/gmd-9-4111-2016 https://doaj.org/article/dbe7b5637f5c41ee9017a535df1f1edf EN eng Copernicus Publications https://www.geosci-model-dev.net/9/4111/2016/gmd-9-4111-2016.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-9-4111-2016 1991-959X 1991-9603 https://doaj.org/article/dbe7b5637f5c41ee9017a535df1f1edf Geoscientific Model Development, Vol 9, Pp 4111-4132 (2016) Geology QE1-996.5 article 2016 ftdoajarticles https://doi.org/10.5194/gmd-9-4111-2016 2022-12-31T15:37:59Z This paper accompanies the second OBLIMAP open-source release. The package is developed to map climate fields between a general circulation model (GCM) and an ice sheet model (ISM) in both directions by using optimal aligned oblique projections, which minimize distortions. The curvature of the surfaces of the GCM and ISM grid differ, both grids may be irregularly spaced and the ratio of the grids is allowed to differ largely. OBLIMAP's stand-alone version is able to map data sets that differ in various aspects on the same ISM grid. Each grid may either coincide with the surface of a sphere, an ellipsoid or a flat plane, while the grid types might differ. Re-projection of, for example, ISM data sets is also facilitated. This is demonstrated by relevant applications concerning the major ice caps. As the stand-alone version also applies to the reverse mapping direction, it can be used as an offline coupler. Furthermore, OBLIMAP 2.0 is an embeddable GCM–ISM coupler, suited for high-frequency online coupled experiments. A new fast scan method is presented for structured grids as an alternative for the former time-consuming grid search strategy, realising a performance gain of several orders of magnitude and enabling the mapping of high-resolution data sets with a much larger number of grid nodes. Further, a highly flexible masked mapping option is added. The limitation of the fast scan method with respect to unstructured and adaptive grids is discussed together with a possible future parallel Message Passing Interface (MPI) implementation. Article in Journal/Newspaper Ice Sheet Directory of Open Access Journals: DOAJ Articles Geoscientific Model Development 9 11 4111 4132 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 |
spellingShingle |
Geology QE1-996.5 T. J. Reerink W. J. van de Berg R. S. W. van de Wal OBLIMAP 2.0: a fast climate model–ice sheet model coupler including online embeddable mapping routines |
topic_facet |
Geology QE1-996.5 |
description |
This paper accompanies the second OBLIMAP open-source release. The package is developed to map climate fields between a general circulation model (GCM) and an ice sheet model (ISM) in both directions by using optimal aligned oblique projections, which minimize distortions. The curvature of the surfaces of the GCM and ISM grid differ, both grids may be irregularly spaced and the ratio of the grids is allowed to differ largely. OBLIMAP's stand-alone version is able to map data sets that differ in various aspects on the same ISM grid. Each grid may either coincide with the surface of a sphere, an ellipsoid or a flat plane, while the grid types might differ. Re-projection of, for example, ISM data sets is also facilitated. This is demonstrated by relevant applications concerning the major ice caps. As the stand-alone version also applies to the reverse mapping direction, it can be used as an offline coupler. Furthermore, OBLIMAP 2.0 is an embeddable GCM–ISM coupler, suited for high-frequency online coupled experiments. A new fast scan method is presented for structured grids as an alternative for the former time-consuming grid search strategy, realising a performance gain of several orders of magnitude and enabling the mapping of high-resolution data sets with a much larger number of grid nodes. Further, a highly flexible masked mapping option is added. The limitation of the fast scan method with respect to unstructured and adaptive grids is discussed together with a possible future parallel Message Passing Interface (MPI) implementation. |
format |
Article in Journal/Newspaper |
author |
T. J. Reerink W. J. van de Berg R. S. W. van de Wal |
author_facet |
T. J. Reerink W. J. van de Berg R. S. W. van de Wal |
author_sort |
T. J. Reerink |
title |
OBLIMAP 2.0: a fast climate model–ice sheet model coupler including online embeddable mapping routines |
title_short |
OBLIMAP 2.0: a fast climate model–ice sheet model coupler including online embeddable mapping routines |
title_full |
OBLIMAP 2.0: a fast climate model–ice sheet model coupler including online embeddable mapping routines |
title_fullStr |
OBLIMAP 2.0: a fast climate model–ice sheet model coupler including online embeddable mapping routines |
title_full_unstemmed |
OBLIMAP 2.0: a fast climate model–ice sheet model coupler including online embeddable mapping routines |
title_sort |
oblimap 2.0: a fast climate model–ice sheet model coupler including online embeddable mapping routines |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/gmd-9-4111-2016 https://doaj.org/article/dbe7b5637f5c41ee9017a535df1f1edf |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Geoscientific Model Development, Vol 9, Pp 4111-4132 (2016) |
op_relation |
https://www.geosci-model-dev.net/9/4111/2016/gmd-9-4111-2016.pdf https://doaj.org/toc/1991-959X https://doaj.org/toc/1991-9603 doi:10.5194/gmd-9-4111-2016 1991-959X 1991-9603 https://doaj.org/article/dbe7b5637f5c41ee9017a535df1f1edf |
op_doi |
https://doi.org/10.5194/gmd-9-4111-2016 |
container_title |
Geoscientific Model Development |
container_volume |
9 |
container_issue |
11 |
container_start_page |
4111 |
op_container_end_page |
4132 |
_version_ |
1766031080259846144 |