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...
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Copernicus Publications
2021
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Online Access: | https://doi.org/10.5194/os-17-1177-2021 https://os.copernicus.org/articles/17/1177/2021/os-17-1177-2021.pdf https://doaj.org/article/a0b7c80c32aa4f6395249b468139b5da |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:a0b7c80c32aa4f6395249b468139b5da 2023-05-15T17:35:12+02:00 Regional imprints of changes in the Atlantic Meridional Overturning Circulation in the eddy-rich ocean model VIKING20X A. Biastoch F. U. Schwarzkopf K. Getzlaff S. Rühs T. Martin M. Scheinert T. Schulzki P. Handmann R. Hummels C. W. Böning 2021-09-01 https://doi.org/10.5194/os-17-1177-2021 https://os.copernicus.org/articles/17/1177/2021/os-17-1177-2021.pdf https://doaj.org/article/a0b7c80c32aa4f6395249b468139b5da en eng Copernicus Publications doi:10.5194/os-17-1177-2021 1812-0784 1812-0792 https://os.copernicus.org/articles/17/1177/2021/os-17-1177-2021.pdf https://doaj.org/article/a0b7c80c32aa4f6395249b468139b5da undefined Ocean Science, Vol 17, Pp 1177-1211 (2021) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.5194/os-17-1177-2021 2023-01-22T18:03:49Z 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 of the Atlantic Meridional Overturning Circulation (AMOC), and in particular the long-term temporal evolution, 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. This points to a dominant role of the wind forcing. The ability of the model to represent regional observations in western boundary current (WBC) systems at 53∘ N, 26.5∘ N and 11∘ S is explored. The question is investigated of whether WBC systems are able to represent the AMOC, and in particular whether these WBC systems exhibit similar temporal evolution to that of the zonally integrated 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, once 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 of representing realistic forcing-related and ocean-intrinsic trends. Article in Journal/Newspaper North Atlantic Sea ice Unknown Ocean Science 17 5 1177 1211 |
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Open Polar |
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English |
topic |
geo envir |
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geo envir A. Biastoch F. U. Schwarzkopf K. Getzlaff S. Rühs T. Martin M. Scheinert T. Schulzki P. Handmann R. Hummels C. W. Böning Regional imprints of changes in the Atlantic Meridional Overturning Circulation in the eddy-rich ocean model VIKING20X |
topic_facet |
geo envir |
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 of the Atlantic Meridional Overturning Circulation (AMOC), and in particular the long-term temporal evolution, 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. This points to a dominant role of the wind forcing. The ability of the model to represent regional observations in western boundary current (WBC) systems at 53∘ N, 26.5∘ N and 11∘ S is explored. The question is investigated of whether WBC systems are able to represent the AMOC, and in particular whether these WBC systems exhibit similar temporal evolution to that of the zonally integrated 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, once 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 of representing realistic forcing-related and ocean-intrinsic trends. |
format |
Article in Journal/Newspaper |
author |
A. Biastoch F. U. Schwarzkopf K. Getzlaff S. Rühs T. Martin M. Scheinert T. Schulzki P. Handmann R. Hummels C. W. Böning |
author_facet |
A. Biastoch F. U. Schwarzkopf K. Getzlaff S. Rühs T. Martin M. Scheinert T. Schulzki P. Handmann R. Hummels C. W. Böning |
author_sort |
A. Biastoch |
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 |
publishDate |
2021 |
url |
https://doi.org/10.5194/os-17-1177-2021 https://os.copernicus.org/articles/17/1177/2021/os-17-1177-2021.pdf https://doaj.org/article/a0b7c80c32aa4f6395249b468139b5da |
genre |
North Atlantic Sea ice |
genre_facet |
North Atlantic Sea ice |
op_source |
Ocean Science, Vol 17, Pp 1177-1211 (2021) |
op_relation |
doi:10.5194/os-17-1177-2021 1812-0784 1812-0792 https://os.copernicus.org/articles/17/1177/2021/os-17-1177-2021.pdf https://doaj.org/article/a0b7c80c32aa4f6395249b468139b5da |
op_rights |
undefined |
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_ |
1766134281795534848 |