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 |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2015
|
Subjects: | |
Online Access: | https://eprints.soton.ac.uk/371831/ https://eprints.soton.ac.uk/371831/1/1-s2.0-S0924796314002437-main.pdf |
id |
ftsouthampton:oai:eprints.soton.ac.uk:371831 |
---|---|
record_format |
openpolar |
spelling |
ftsouthampton:oai:eprints.soton.ac.uk:371831 2023-07-30T04:03:53+02:00 The North Atlantic subpolar circulation in an eddy-resolving global ocean model Marzocchi, Alice Hirschi, Joël J.-M. Holliday, N. Penny Cunningham, Stuart A. Blaker, Adam T. Coward, Andrew C. 2015-02 text https://eprints.soton.ac.uk/371831/ https://eprints.soton.ac.uk/371831/1/1-s2.0-S0924796314002437-main.pdf en English eng https://eprints.soton.ac.uk/371831/1/1-s2.0-S0924796314002437-main.pdf Marzocchi, Alice, Hirschi, Joël J.-M., Holliday, N. Penny, Cunningham, Stuart A., Blaker, Adam T. and Coward, Andrew C. (2015) The North Atlantic subpolar circulation in an eddy-resolving global ocean model. Journal of Marine Systems, 142, 126-143. (doi:10.1016/j.jmarsys.2014.10.007 <http://dx.doi.org/10.1016/j.jmarsys.2014.10.007>). other Article PeerReviewed 2015 ftsouthampton https://doi.org/10.1016/j.jmarsys.2014.10.007 2023-07-09T21:56:21Z 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 Southampton: e-Prints Soton Greenland Journal of Marine Systems 142 126 143 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
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, Joël J.-M. Holliday, N. Penny Cunningham, Stuart A. Blaker, Adam T. Coward, Andrew C. |
spellingShingle |
Marzocchi, Alice Hirschi, Joël 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 |
author_facet |
Marzocchi, Alice Hirschi, Joël 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://eprints.soton.ac.uk/371831/ https://eprints.soton.ac.uk/371831/1/1-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_relation |
https://eprints.soton.ac.uk/371831/1/1-s2.0-S0924796314002437-main.pdf Marzocchi, Alice, Hirschi, Joël J.-M., Holliday, N. Penny, Cunningham, Stuart A., Blaker, Adam T. and Coward, Andrew C. (2015) The North Atlantic subpolar circulation in an eddy-resolving global ocean model. Journal of Marine Systems, 142, 126-143. (doi:10.1016/j.jmarsys.2014.10.007 <http://dx.doi.org/10.1016/j.jmarsys.2014.10.007>). |
op_rights |
other |
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 |
_version_ |
1772815013056086016 |