Regional Imprints of Changes in the Atlantic Meridional Overturning Circulation in the Eddy-rich Ocean Model VIKING20X
A hierarchy of global 1/4° (ORCA025) and Atlantic Ocean 1/20° nested (VIKING20X) ocean/sea-ice models is described. It is shown that the eddy-rich configurations performed in hindcasts of the past 50–60 years under CORE and JRA55-do atmospheric forcings realistically simulate the large-scale horizon...
Published in: | Ocean Science |
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Language: | English |
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Copernicus Publications (EGU)
2021
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Online Access: | https://oceanrep.geomar.de/id/eprint/52613/ https://oceanrep.geomar.de/id/eprint/52613/7/os-17-1177-2021.pdf https://os.copernicus.org/articles/17/1177/2021/os-17-1177-2021.html https://doi.org/10.5194/os-17-1177-2021 |
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ftoceanrep:oai:oceanrep.geomar.de:52613 2024-02-11T10:06:36+01:00 Regional Imprints of Changes in the Atlantic Meridional Overturning Circulation in the Eddy-rich Ocean Model VIKING20X Biastoch, Arne Schwarzkopf, Franziska U. Getzlaff, Klaus Rühs, Siren Martin, Torge Scheinert, Markus Schulzki, Tobias G. Handmann, Patricia Hummels, Rebecca Böning, Claus W. 2021-09-02 text https://oceanrep.geomar.de/id/eprint/52613/ https://oceanrep.geomar.de/id/eprint/52613/7/os-17-1177-2021.pdf https://os.copernicus.org/articles/17/1177/2021/os-17-1177-2021.html https://doi.org/10.5194/os-17-1177-2021 en eng Copernicus Publications (EGU) https://oceanrep.geomar.de/id/eprint/52613/7/os-17-1177-2021.pdf Biastoch, A. , Schwarzkopf, F. U. , Getzlaff, K. , Rühs, S. , Martin, T. , Scheinert, M. , Schulzki, T. G. , Handmann, P. , Hummels, R. and Böning, C. W. (2021) Regional Imprints of Changes in the Atlantic Meridional Overturning Circulation in the Eddy-rich Ocean Model VIKING20X. Open Access Ocean Science, 17 . pp. 1177-1211. DOI 10.5194/os-17-1177-2021 <https://doi.org/10.5194/os-17-1177-2021>. doi:10.5194/os-17-1177-2021 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed info:eu-repo/semantics/article 2021 ftoceanrep https://doi.org/10.5194/os-17-1177-2021 2024-01-15T00:23:30Z A hierarchy of global 1/4° (ORCA025) and Atlantic Ocean 1/20° nested (VIKING20X) ocean/sea-ice models is described. It is shown that the eddy-rich configurations performed in hindcasts of the past 50–60 years under CORE and JRA55-do atmospheric forcings realistically simulate the large-scale horizontal circulation, the distribution of the mesoscale, overflow and convective processes, and the representation of regional current systems in the North and South Atlantic. The representation, and in particular the long-term temporal evolution, of the Atlantic Meridional Overturning Circulation (AMOC) strongly depends on numerical choices for the application of freshwater fluxes. The interannual variability of the AMOC instead is highly correlated among the model experiments and also with observations, including the 2010 minimum observed by RAPID at 26.5° N pointing at a dominant role of the forcing. Regional observations in western boundary current systems at 53° N, 26.5° N and 11° S are explored in respect to their ability to represent the AMOC and to monitor the temporal evolution of the AMOC. Apart from the basin-scale measurements at 26.5° N, it is shown that in particular the outflow of North Atlantic Deepwater at 53° N is a good indicator of the subpolar AMOC trend during the recent decades, if the latter is provided in density coordinates. The good reproduction of observed AMOC and WBC trends in the most reasonable simulations indicate that the eddy-rich VIKING20X is capable in representing realistic forcing-related and ocean-intrinsic trends. Article in Journal/Newspaper North Atlantic Sea ice OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Ocean Science 17 5 1177 1211 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
A hierarchy of global 1/4° (ORCA025) and Atlantic Ocean 1/20° nested (VIKING20X) ocean/sea-ice models is described. It is shown that the eddy-rich configurations performed in hindcasts of the past 50–60 years under CORE and JRA55-do atmospheric forcings realistically simulate the large-scale horizontal circulation, the distribution of the mesoscale, overflow and convective processes, and the representation of regional current systems in the North and South Atlantic. The representation, and in particular the long-term temporal evolution, of the Atlantic Meridional Overturning Circulation (AMOC) strongly depends on numerical choices for the application of freshwater fluxes. The interannual variability of the AMOC instead is highly correlated among the model experiments and also with observations, including the 2010 minimum observed by RAPID at 26.5° N pointing at a dominant role of the forcing. Regional observations in western boundary current systems at 53° N, 26.5° N and 11° S are explored in respect to their ability to represent the AMOC and to monitor the temporal evolution of the AMOC. Apart from the basin-scale measurements at 26.5° N, it is shown that in particular the outflow of North Atlantic Deepwater at 53° N is a good indicator of the subpolar AMOC trend during the recent decades, if the latter is provided in density coordinates. The good reproduction of observed AMOC and WBC trends in the most reasonable simulations indicate that the eddy-rich VIKING20X is capable in representing realistic forcing-related and ocean-intrinsic trends. |
format |
Article in Journal/Newspaper |
author |
Biastoch, Arne Schwarzkopf, Franziska U. Getzlaff, Klaus Rühs, Siren Martin, Torge Scheinert, Markus Schulzki, Tobias G. Handmann, Patricia Hummels, Rebecca Böning, Claus W. |
spellingShingle |
Biastoch, Arne Schwarzkopf, Franziska U. Getzlaff, Klaus Rühs, Siren Martin, Torge Scheinert, Markus Schulzki, Tobias G. Handmann, Patricia Hummels, Rebecca Böning, Claus W. Regional Imprints of Changes in the Atlantic Meridional Overturning Circulation in the Eddy-rich Ocean Model VIKING20X |
author_facet |
Biastoch, Arne Schwarzkopf, Franziska U. Getzlaff, Klaus Rühs, Siren Martin, Torge Scheinert, Markus Schulzki, Tobias G. Handmann, Patricia Hummels, Rebecca Böning, Claus W. |
author_sort |
Biastoch, Arne |
title |
Regional Imprints of Changes in the Atlantic Meridional Overturning Circulation in the Eddy-rich Ocean Model VIKING20X |
title_short |
Regional Imprints of Changes in the Atlantic Meridional Overturning Circulation in the Eddy-rich Ocean Model VIKING20X |
title_full |
Regional Imprints of Changes in the Atlantic Meridional Overturning Circulation in the Eddy-rich Ocean Model VIKING20X |
title_fullStr |
Regional Imprints of Changes in the Atlantic Meridional Overturning Circulation in the Eddy-rich Ocean Model VIKING20X |
title_full_unstemmed |
Regional Imprints of Changes in the Atlantic Meridional Overturning Circulation in the Eddy-rich Ocean Model VIKING20X |
title_sort |
regional imprints of changes in the atlantic meridional overturning circulation in the eddy-rich ocean model viking20x |
publisher |
Copernicus Publications (EGU) |
publishDate |
2021 |
url |
https://oceanrep.geomar.de/id/eprint/52613/ https://oceanrep.geomar.de/id/eprint/52613/7/os-17-1177-2021.pdf https://os.copernicus.org/articles/17/1177/2021/os-17-1177-2021.html https://doi.org/10.5194/os-17-1177-2021 |
genre |
North Atlantic Sea ice |
genre_facet |
North Atlantic Sea ice |
op_relation |
https://oceanrep.geomar.de/id/eprint/52613/7/os-17-1177-2021.pdf Biastoch, A. , Schwarzkopf, F. U. , Getzlaff, K. , Rühs, S. , Martin, T. , Scheinert, M. , Schulzki, T. G. , Handmann, P. , Hummels, R. and Böning, C. W. (2021) Regional Imprints of Changes in the Atlantic Meridional Overturning Circulation in the Eddy-rich Ocean Model VIKING20X. Open Access Ocean Science, 17 . pp. 1177-1211. DOI 10.5194/os-17-1177-2021 <https://doi.org/10.5194/os-17-1177-2021>. doi:10.5194/os-17-1177-2021 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/os-17-1177-2021 |
container_title |
Ocean Science |
container_volume |
17 |
container_issue |
5 |
container_start_page |
1177 |
op_container_end_page |
1211 |
_version_ |
1790604404914651136 |