A damped decadal oscillation in the North Atlantic climate system
A simple stochastic atmosphere model is coupled to a realistic model of the North Atlantic Ocean. A north–south SST dipole, with its zero line centered along the subpolar front, influences the atmosphere model, which in turn forces the ocean model by surface fluxes related to the North Atlantic Osci...
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ftoceanrep:oai:oceanrep.geomar.de:6895 2023-05-15T17:28:04+02:00 A damped decadal oscillation in the North Atlantic climate system Eden, Carsten Greatbatch, Richard John 2003 text https://oceanrep.geomar.de/id/eprint/6895/ https://oceanrep.geomar.de/id/eprint/6895/1/1520-0442%282003%29016_4043_ADDOIT_2.0.pdf https://doi.org/10.1175/1520-0442(2003)016<4043:ADDOIT>2.0.CO;2 en eng AMS (American Meteorological Society) https://oceanrep.geomar.de/id/eprint/6895/1/1520-0442%282003%29016_4043_ADDOIT_2.0.pdf Eden, C. and Greatbatch, R. J. (2003) A damped decadal oscillation in the North Atlantic climate system. Open Access Journal of Climate, - (16). pp. 443-460. DOI 10.1175/1520-0442(2003)016<4043:ADDOIT>2.0.CO;2 <https://doi.org/10.1175/1520-0442%282003%29016%3C4043%3AADDOIT%3E2.0.CO%3B2>. doi:10.1175/1520-0442(2003)016<4043:ADDOIT>2.0.CO;2 info:eu-repo/semantics/openAccess Article PeerReviewed 2003 ftoceanrep https://doi.org/10.1175/1520-0442(2003)016<4043:ADDOIT>2.0.CO;2 2023-04-07T14:53:46Z A simple stochastic atmosphere model is coupled to a realistic model of the North Atlantic Ocean. A north–south SST dipole, with its zero line centered along the subpolar front, influences the atmosphere model, which in turn forces the ocean model by surface fluxes related to the North Atlantic Oscillation. The coupled system exhibits a damped decadal oscillation associated with the adjustment through the ocean model to the changing surface forcing. The oscillation consists of a fast wind-driven, positive feedback of the ocean and a delayed negative feedback orchestrated by overturning circulation anomalies. The positive feedback turns out to be necessary to distinguish the coupled oscillation from that in a model without any influence from the ocean to the atmosphere. Using a novel diagnosing technique, it is possible to rule out the importance of baroclinic wave processes for determining the period of the oscillation, and to show the important role played by anomalous geostrophic advection in sustaining the oscillation. Article in Journal/Newspaper North Atlantic North Atlantic oscillation OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
A simple stochastic atmosphere model is coupled to a realistic model of the North Atlantic Ocean. A north–south SST dipole, with its zero line centered along the subpolar front, influences the atmosphere model, which in turn forces the ocean model by surface fluxes related to the North Atlantic Oscillation. The coupled system exhibits a damped decadal oscillation associated with the adjustment through the ocean model to the changing surface forcing. The oscillation consists of a fast wind-driven, positive feedback of the ocean and a delayed negative feedback orchestrated by overturning circulation anomalies. The positive feedback turns out to be necessary to distinguish the coupled oscillation from that in a model without any influence from the ocean to the atmosphere. Using a novel diagnosing technique, it is possible to rule out the importance of baroclinic wave processes for determining the period of the oscillation, and to show the important role played by anomalous geostrophic advection in sustaining the oscillation. |
format |
Article in Journal/Newspaper |
author |
Eden, Carsten Greatbatch, Richard John |
spellingShingle |
Eden, Carsten Greatbatch, Richard John A damped decadal oscillation in the North Atlantic climate system |
author_facet |
Eden, Carsten Greatbatch, Richard John |
author_sort |
Eden, Carsten |
title |
A damped decadal oscillation in the North Atlantic climate system |
title_short |
A damped decadal oscillation in the North Atlantic climate system |
title_full |
A damped decadal oscillation in the North Atlantic climate system |
title_fullStr |
A damped decadal oscillation in the North Atlantic climate system |
title_full_unstemmed |
A damped decadal oscillation in the North Atlantic climate system |
title_sort |
damped decadal oscillation in the north atlantic climate system |
publisher |
AMS (American Meteorological Society) |
publishDate |
2003 |
url |
https://oceanrep.geomar.de/id/eprint/6895/ https://oceanrep.geomar.de/id/eprint/6895/1/1520-0442%282003%29016_4043_ADDOIT_2.0.pdf https://doi.org/10.1175/1520-0442(2003)016<4043:ADDOIT>2.0.CO;2 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
https://oceanrep.geomar.de/id/eprint/6895/1/1520-0442%282003%29016_4043_ADDOIT_2.0.pdf Eden, C. and Greatbatch, R. J. (2003) A damped decadal oscillation in the North Atlantic climate system. Open Access Journal of Climate, - (16). pp. 443-460. DOI 10.1175/1520-0442(2003)016<4043:ADDOIT>2.0.CO;2 <https://doi.org/10.1175/1520-0442%282003%29016%3C4043%3AADDOIT%3E2.0.CO%3B2>. doi:10.1175/1520-0442(2003)016<4043:ADDOIT>2.0.CO;2 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1175/1520-0442(2003)016<4043:ADDOIT>2.0.CO;2 |
_version_ |
1766120528983097344 |