Oceanic hindcast simulations at high resolution suggest that the Atlantic MOC is bistable
All climate models predict a freshening of the North Atlantic at high latitude that may induce an abrupt change of the Atlantic Meridional Overturning Circulation (hereafter AMOC) if it resides in the bistable regime, where both a strong and a weak state coexist. The latter remains uncertain as ther...
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ftird:oai:ird.fr:fdi:010060527 2024-09-15T18:23:18+00:00 Oceanic hindcast simulations at high resolution suggest that the Atlantic MOC is bistable /Deshayes, Julie Treguier, A. M. Barnier, B. Lecointre, A. Le Sommer, J. Molines, J. M. Penduff, T. Bourdalle-Badie, R. Drillet, Y. Garric, G. Benshila, R. Madec, G. Biastoch, A. Boning, C. W. Scheinert, M. Coward, A. C. Hirschi, J. J. M. OCEAN ATLANTIQUE 2013 https://www.documentation.ird.fr/hor/fdi:010060527 EN eng https://www.documentation.ird.fr/hor/fdi:010060527 oai:ird.fr:fdi:010060527 Deshayes Julie, Treguier A. M., Barnier B., Lecointre A., Le Sommer J., Molines J. M., Penduff T., Bourdalle-Badie R., Drillet Y., Garric G., Benshila R., Madec G., Biastoch A., Boning C. W., Scheinert M., Coward A. C., Hirschi J. J. M. Oceanic hindcast simulations at high resolution suggest that the Atlantic MOC is bistable. 2013, 40 (12), p. 3069-3073 AMOC freshwater bistability modeling text 2013 ftird 2024-08-15T05:57:42Z All climate models predict a freshening of the North Atlantic at high latitude that may induce an abrupt change of the Atlantic Meridional Overturning Circulation (hereafter AMOC) if it resides in the bistable regime, where both a strong and a weak state coexist. The latter remains uncertain as there is no consensus among observations and ocean reanalyses, where the AMOC is bistable, versus most climate models that reproduce a mono-stable strong AMOC. A series of four hindcast simulations of the global ocean at 1/12 degrees resolution, which is presently unique, are used to diagnose freshwater transport by the AMOC in the South Atlantic, an indicator of AMOC bistability. In all simulations, the AMOC resides in the bistable regime: it exports freshwater southward in the South Atlantic, implying a positive salt advection feedback that would act to amplify a decreasing trend in subarctic deep water formation as projected in climate scenarios. Text North Atlantic Subarctic IRD (Institute de recherche pour le développement): Horizon |
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IRD (Institute de recherche pour le développement): Horizon |
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language |
English |
topic |
AMOC freshwater bistability modeling |
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AMOC freshwater bistability modeling /Deshayes, Julie Treguier, A. M. Barnier, B. Lecointre, A. Le Sommer, J. Molines, J. M. Penduff, T. Bourdalle-Badie, R. Drillet, Y. Garric, G. Benshila, R. Madec, G. Biastoch, A. Boning, C. W. Scheinert, M. Coward, A. C. Hirschi, J. J. M. Oceanic hindcast simulations at high resolution suggest that the Atlantic MOC is bistable |
topic_facet |
AMOC freshwater bistability modeling |
description |
All climate models predict a freshening of the North Atlantic at high latitude that may induce an abrupt change of the Atlantic Meridional Overturning Circulation (hereafter AMOC) if it resides in the bistable regime, where both a strong and a weak state coexist. The latter remains uncertain as there is no consensus among observations and ocean reanalyses, where the AMOC is bistable, versus most climate models that reproduce a mono-stable strong AMOC. A series of four hindcast simulations of the global ocean at 1/12 degrees resolution, which is presently unique, are used to diagnose freshwater transport by the AMOC in the South Atlantic, an indicator of AMOC bistability. In all simulations, the AMOC resides in the bistable regime: it exports freshwater southward in the South Atlantic, implying a positive salt advection feedback that would act to amplify a decreasing trend in subarctic deep water formation as projected in climate scenarios. |
format |
Text |
author |
/Deshayes, Julie Treguier, A. M. Barnier, B. Lecointre, A. Le Sommer, J. Molines, J. M. Penduff, T. Bourdalle-Badie, R. Drillet, Y. Garric, G. Benshila, R. Madec, G. Biastoch, A. Boning, C. W. Scheinert, M. Coward, A. C. Hirschi, J. J. M. |
author_facet |
/Deshayes, Julie Treguier, A. M. Barnier, B. Lecointre, A. Le Sommer, J. Molines, J. M. Penduff, T. Bourdalle-Badie, R. Drillet, Y. Garric, G. Benshila, R. Madec, G. Biastoch, A. Boning, C. W. Scheinert, M. Coward, A. C. Hirschi, J. J. M. |
author_sort |
/Deshayes, Julie |
title |
Oceanic hindcast simulations at high resolution suggest that the Atlantic MOC is bistable |
title_short |
Oceanic hindcast simulations at high resolution suggest that the Atlantic MOC is bistable |
title_full |
Oceanic hindcast simulations at high resolution suggest that the Atlantic MOC is bistable |
title_fullStr |
Oceanic hindcast simulations at high resolution suggest that the Atlantic MOC is bistable |
title_full_unstemmed |
Oceanic hindcast simulations at high resolution suggest that the Atlantic MOC is bistable |
title_sort |
oceanic hindcast simulations at high resolution suggest that the atlantic moc is bistable |
publishDate |
2013 |
url |
https://www.documentation.ird.fr/hor/fdi:010060527 |
op_coverage |
OCEAN ATLANTIQUE |
genre |
North Atlantic Subarctic |
genre_facet |
North Atlantic Subarctic |
op_relation |
https://www.documentation.ird.fr/hor/fdi:010060527 oai:ird.fr:fdi:010060527 Deshayes Julie, Treguier A. M., Barnier B., Lecointre A., Le Sommer J., Molines J. M., Penduff T., Bourdalle-Badie R., Drillet Y., Garric G., Benshila R., Madec G., Biastoch A., Boning C. W., Scheinert M., Coward A. C., Hirschi J. J. M. Oceanic hindcast simulations at high resolution suggest that the Atlantic MOC is bistable. 2013, 40 (12), p. 3069-3073 |
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1810463485216161792 |