The North Atlantic subpolar circulation in an eddy-resolving global ocean model
The subpolar North Atlantic represents a key region for global climate, but most numerical models still have well-described limitations in correctly simulating the local circulation patterns. Here, we present the analysis of a 30-year run with a global eddy-resolving (1/12°) version of the NEMO ocea...
Published in: | Journal of Marine Systems |
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ftuhipublicatio:oai:pure.atira.dk:publications/95a8e465-fd9d-433d-9933-7793307a127e 2024-04-14T08:12:32+00:00 The North Atlantic subpolar circulation in an eddy-resolving global ocean model Marzocchi, Alice Hirschi, Joel J. -M. Holliday, N. Penny Cunningham, Stuart A. Blaker, Adam T. Coward, Andrew C. 2015-02 application/pdf https://pure.uhi.ac.uk/en/publications/95a8e465-fd9d-433d-9933-7793307a127e https://doi.org/10.1016/j.jmarsys.2014.10.007 https://pureadmin.uhi.ac.uk/ws/files/1899677/1_s2.0_S0924796314002437_main.pdf eng eng info:eu-repo/semantics/openAccess Marzocchi , A , Hirschi , J J -M , Holliday , N P , Cunningham , S A , Blaker , A T & Coward , A C 2015 , ' The North Atlantic subpolar circulation in an eddy-resolving global ocean model ' , JOURNAL OF MARINE SYSTEMS , vol. 142 , pp. 126-143 . https://doi.org/10.1016/j.jmarsys.2014.10.007 Ocean modelling Eddy-resolving NEMO North Atlantic Subpolar gyre warming Physical oceanography 7ref2021 article 2015 ftuhipublicatio https://doi.org/10.1016/j.jmarsys.2014.10.007 2024-03-21T16:56:47Z The subpolar North Atlantic represents a key region for global climate, but most numerical models still have well-described limitations in correctly simulating the local circulation patterns. Here, we present the analysis of a 30-year run with a global eddy-resolving (1/12°) version of the NEMO ocean model. Compared to the 1° and 1/4° equivalent versions, this simulation more realistically represents the shape of the Subpolar Gyre, the position of the North Atlantic Current, and the Gulf Stream separation. Other key improvements are found in the representation of boundary currents, multi-year variability of temperature and depth of winter mixing in the Labrador Sea, and the transport of overflows at the Greenland–Scotland Ridge. However, the salinity, stratification and mean depth of winter mixing in the Labrador Sea, and the density and depth of overflow water south of the sill, still present challenges to the model. This simulation also provides further insight into the spatio-temporal development of the warming event observed in the Subpolar Gyre in the mid 1990s, which appears to coincide with a phase of increased eddy activity in the southernmost part of the gyre. This may have provided a gateway through which heat would have propagated into the gyre's interior. Article in Journal/Newspaper Greenland Greenland-Scotland Ridge Labrador Sea north atlantic current North Atlantic University of the Highlands and Islands: Research Database of UHI Greenland Journal of Marine Systems 142 126 143 |
institution |
Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
topic |
Ocean modelling Eddy-resolving NEMO North Atlantic Subpolar gyre warming Physical oceanography 7ref2021 |
spellingShingle |
Ocean modelling Eddy-resolving NEMO North Atlantic Subpolar gyre warming Physical oceanography 7ref2021 Marzocchi, Alice Hirschi, Joel J. -M. Holliday, N. Penny Cunningham, Stuart A. Blaker, Adam T. Coward, Andrew C. The North Atlantic subpolar circulation in an eddy-resolving global ocean model |
topic_facet |
Ocean modelling Eddy-resolving NEMO North Atlantic Subpolar gyre warming Physical oceanography 7ref2021 |
description |
The subpolar North Atlantic represents a key region for global climate, but most numerical models still have well-described limitations in correctly simulating the local circulation patterns. Here, we present the analysis of a 30-year run with a global eddy-resolving (1/12°) version of the NEMO ocean model. Compared to the 1° and 1/4° equivalent versions, this simulation more realistically represents the shape of the Subpolar Gyre, the position of the North Atlantic Current, and the Gulf Stream separation. Other key improvements are found in the representation of boundary currents, multi-year variability of temperature and depth of winter mixing in the Labrador Sea, and the transport of overflows at the Greenland–Scotland Ridge. However, the salinity, stratification and mean depth of winter mixing in the Labrador Sea, and the density and depth of overflow water south of the sill, still present challenges to the model. This simulation also provides further insight into the spatio-temporal development of the warming event observed in the Subpolar Gyre in the mid 1990s, which appears to coincide with a phase of increased eddy activity in the southernmost part of the gyre. This may have provided a gateway through which heat would have propagated into the gyre's interior. |
format |
Article in Journal/Newspaper |
author |
Marzocchi, Alice Hirschi, Joel J. -M. Holliday, N. Penny Cunningham, Stuart A. Blaker, Adam T. Coward, Andrew C. |
author_facet |
Marzocchi, Alice Hirschi, Joel J. -M. Holliday, N. Penny Cunningham, Stuart A. Blaker, Adam T. Coward, Andrew C. |
author_sort |
Marzocchi, Alice |
title |
The North Atlantic subpolar circulation in an eddy-resolving global ocean model |
title_short |
The North Atlantic subpolar circulation in an eddy-resolving global ocean model |
title_full |
The North Atlantic subpolar circulation in an eddy-resolving global ocean model |
title_fullStr |
The North Atlantic subpolar circulation in an eddy-resolving global ocean model |
title_full_unstemmed |
The North Atlantic subpolar circulation in an eddy-resolving global ocean model |
title_sort |
north atlantic subpolar circulation in an eddy-resolving global ocean model |
publishDate |
2015 |
url |
https://pure.uhi.ac.uk/en/publications/95a8e465-fd9d-433d-9933-7793307a127e https://doi.org/10.1016/j.jmarsys.2014.10.007 https://pureadmin.uhi.ac.uk/ws/files/1899677/1_s2.0_S0924796314002437_main.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland-Scotland Ridge Labrador Sea north atlantic current North Atlantic |
genre_facet |
Greenland Greenland-Scotland Ridge Labrador Sea north atlantic current North Atlantic |
op_source |
Marzocchi , A , Hirschi , J J -M , Holliday , N P , Cunningham , S A , Blaker , A T & Coward , A C 2015 , ' The North Atlantic subpolar circulation in an eddy-resolving global ocean model ' , JOURNAL OF MARINE SYSTEMS , vol. 142 , pp. 126-143 . https://doi.org/10.1016/j.jmarsys.2014.10.007 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.jmarsys.2014.10.007 |
container_title |
Journal of Marine Systems |
container_volume |
142 |
container_start_page |
126 |
op_container_end_page |
143 |
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1796310359421747200 |