Dynamics of decadal variability in the Atlantic subpolar gyre : a stochastically forced oscillator
Internal variability of the Atlantic subpolar gyre is investigated in a 600 years control simulation of a comprehensive coupled climate model. The subpolar gyre shows irregular oscillations of decadal time scale with most spectral power between 15 and 20 years. Positive and negative feedback mechani...
Main Authors: | , |
---|---|
Format: | Text |
Language: | English |
Published: |
2012
|
Subjects: | |
Online Access: | https://www.documentation.ird.fr/hor/fdi:010055996 |
id |
ftird:oai:ird.fr:fdi:010055996 |
---|---|
record_format |
openpolar |
spelling |
ftird:oai:ird.fr:fdi:010055996 2024-09-15T18:23:08+00:00 Dynamics of decadal variability in the Atlantic subpolar gyre : a stochastically forced oscillator Born, A. /Mignot, Juliette 2012 https://www.documentation.ird.fr/hor/fdi:010055996 EN eng https://www.documentation.ird.fr/hor/fdi:010055996 oai:ird.fr:fdi:010055996 Born A., Mignot Juliette. Dynamics of decadal variability in the Atlantic subpolar gyre : a stochastically forced oscillator. 2012, 39 (1-2), p. 461-474 Ocean circulation North Atlantic Subpolar gyre Decadal variability text 2012 ftird 2024-08-15T05:57:42Z Internal variability of the Atlantic subpolar gyre is investigated in a 600 years control simulation of a comprehensive coupled climate model. The subpolar gyre shows irregular oscillations of decadal time scale with most spectral power between 15 and 20 years. Positive and negative feedback mechanisms act successively on the circulation leading to an internal oscillation. This involves periodically enhanced deep convection in the subpolar gyre center and intermittently enhanced air-sea thermal coupling. As a result, anomalies of the large-scale atmospheric circulation can be transferred to the ocean on the ocean's intrinsic time scale, exciting the oscillator stochastically. A detailed understanding of oscillatory mechanisms of the ocean and their sensitivity to atmospheric forcing holds considerable potential for decadal predictions as well as for the interpretation of proxy data records. Text North Atlantic IRD (Institute de recherche pour le développement): Horizon |
institution |
Open Polar |
collection |
IRD (Institute de recherche pour le développement): Horizon |
op_collection_id |
ftird |
language |
English |
topic |
Ocean circulation North Atlantic Subpolar gyre Decadal variability |
spellingShingle |
Ocean circulation North Atlantic Subpolar gyre Decadal variability Born, A. /Mignot, Juliette Dynamics of decadal variability in the Atlantic subpolar gyre : a stochastically forced oscillator |
topic_facet |
Ocean circulation North Atlantic Subpolar gyre Decadal variability |
description |
Internal variability of the Atlantic subpolar gyre is investigated in a 600 years control simulation of a comprehensive coupled climate model. The subpolar gyre shows irregular oscillations of decadal time scale with most spectral power between 15 and 20 years. Positive and negative feedback mechanisms act successively on the circulation leading to an internal oscillation. This involves periodically enhanced deep convection in the subpolar gyre center and intermittently enhanced air-sea thermal coupling. As a result, anomalies of the large-scale atmospheric circulation can be transferred to the ocean on the ocean's intrinsic time scale, exciting the oscillator stochastically. A detailed understanding of oscillatory mechanisms of the ocean and their sensitivity to atmospheric forcing holds considerable potential for decadal predictions as well as for the interpretation of proxy data records. |
format |
Text |
author |
Born, A. /Mignot, Juliette |
author_facet |
Born, A. /Mignot, Juliette |
author_sort |
Born, A. |
title |
Dynamics of decadal variability in the Atlantic subpolar gyre : a stochastically forced oscillator |
title_short |
Dynamics of decadal variability in the Atlantic subpolar gyre : a stochastically forced oscillator |
title_full |
Dynamics of decadal variability in the Atlantic subpolar gyre : a stochastically forced oscillator |
title_fullStr |
Dynamics of decadal variability in the Atlantic subpolar gyre : a stochastically forced oscillator |
title_full_unstemmed |
Dynamics of decadal variability in the Atlantic subpolar gyre : a stochastically forced oscillator |
title_sort |
dynamics of decadal variability in the atlantic subpolar gyre : a stochastically forced oscillator |
publishDate |
2012 |
url |
https://www.documentation.ird.fr/hor/fdi:010055996 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://www.documentation.ird.fr/hor/fdi:010055996 oai:ird.fr:fdi:010055996 Born A., Mignot Juliette. Dynamics of decadal variability in the Atlantic subpolar gyre : a stochastically forced oscillator. 2012, 39 (1-2), p. 461-474 |
_version_ |
1810463256227086336 |