Relevant bibliographies by topics / Circulation subpolaire

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  2. Dissertations / Theses
  3. Books
  4. Book chapters
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Academic literature on the topic 'Circulation subpolaire'

Author: Grafiati
Published: 25 May 2024
Last updated: 31 July 2025

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Journal articles on the topic "Circulation subpolaire"

1

Deshayes, Julie, and Claude Frankignoul. "Simulated Variability of the Circulation in the North Atlantic from 1953 to 2003." Journal of Climate 21, no. 19 (2008): 4919–33. http://dx.doi.org/10.1175/2008jcli1882.1.

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Abstract The variability of the circulation in the North Atlantic and its link with atmospheric variability are investigated in a realistic hindcast simulation from 1953 to 2003. The interannual-to-decadal variability of the subpolar gyre circulation and the Meridional Overturning Circulation (MOC) is mostly influenced by the North Atlantic Oscillation (NAO). Both circulations intensified from the early 1970s to the mid-1990s and then decreased. The monthly variability of both circulations reflects the fast barotropic adjustment to NAO-related Ekman pumping anomalies, while the interannual-to-
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Deshayes, Julie, Ruth Curry, and Rym Msadek. "CMIP5 Model Intercomparison of Freshwater Budget and Circulation in the North Atlantic." Journal of Climate 27, no. 9 (2014): 3298–317. http://dx.doi.org/10.1175/jcli-d-12-00700.1.

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Abstract The subpolar North Atlantic is a center of variability of ocean properties, wind stress curl, and air–sea exchanges. Observations and hindcast simulations suggest that from the early 1970s to the mid-1990s the subpolar gyre became fresher while the gyre and meridional circulations intensified. This is opposite to the relationship of freshening causing a weakened circulation, most often reproduced by climate models. The authors hypothesize that both these configurations exist but dominate on different time scales: a fresher subpolar gyre when the circulation is more intense, at interan
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Barrier, Nicolas, Christophe Cassou, Julie Deshayes, and Anne-Marie Treguier. "Response of North Atlantic Ocean Circulation to Atmospheric Weather Regimes." Journal of Physical Oceanography 44, no. 1 (2014): 179–201. http://dx.doi.org/10.1175/jpo-d-12-0217.1.

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Abstract A new framework is proposed for investigating the atmospheric forcing of North Atlantic Ocean circulation. Instead of using classical modes of variability, such as the North Atlantic Oscillation (NAO) or the east Atlantic pattern, the weather regimes paradigm was used. Using this framework helped avoid problems associated with the assumptions of orthogonality and symmetry that are particular to modal analysis and known to be unsuitable for the NAO. Using ocean-only historical and sensitivity experiments, the impacts of the four winter weather regimes on horizontal and overturning circ
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Wills, Robert C. J., Kyle C. Armour, David S. Battisti, and Dennis L. Hartmann. "Ocean–Atmosphere Dynamical Coupling Fundamental to the Atlantic Multidecadal Oscillation." Journal of Climate 32, no. 1 (2018): 251–72. http://dx.doi.org/10.1175/jcli-d-18-0269.1.

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Abstract The North Atlantic has shown large multidecadal temperature shifts during the twentieth century. There is ongoing debate about whether this variability arises primarily through the influence of atmospheric internal variability, through changes in ocean circulation, or as a response to anthropogenic forcing. This study isolates the mechanisms driving Atlantic sea surface temperature variability on multidecadal time scales by using low-frequency component analysis (LFCA) to separate the influences of high-frequency variability, multidecadal variability, and long-term global warming. Thi
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Le Bras, Isabela, Fiamma Straneo, Morven Muilwijk, et al. "How Much Arctic Fresh Water Participates in the Subpolar Overturning Circulation?" Journal of Physical Oceanography 51, no. 3 (2021): 955–73. http://dx.doi.org/10.1175/jpo-d-20-0240.1.

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AbstractFresh Arctic waters flowing into the Atlantic are thought to have two primary fates. They may be mixed into the deep ocean as part of the overturning circulation, or flow alongside regions of deep water formation without impacting overturning. Climate models suggest that as increasing amounts of freshwater enter the Atlantic, the overturning circulation will be disrupted, yet we lack an understanding of how much freshwater is mixed into the overturning circulation’s deep limb in the present day. To constrain these freshwater pathways, we build steady-state volume, salt, and heat budget
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Yeager, Stephen. "Topographic Coupling of the Atlantic Overturning and Gyre Circulations." Journal of Physical Oceanography 45, no. 5 (2015): 1258–84. http://dx.doi.org/10.1175/jpo-d-14-0100.1.

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AbstractThe vorticity dynamics associated with the mean and time-varying gyre and overturning circulations of the Atlantic Ocean are examined in a realistic ocean model hindcast simulation of the late twentieth century. Abyssal flow interaction with sloping bottom bathymetry gives rise to the bottom pressure torque (BPT) term of the vertically integrated vorticity equation. The dominance of this term in the closure of the barotropic gyre circulation noted in previous studies is corroborated here for both non-eddy-resolving and eddy-resolving versions of the Parallel Ocean Program (POP) model.
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d’Orgeville, Marc, and W. Richard Peltier. "Implications of Both Statistical Equilibrium and Global Warming Simulations with CCSM3. Part II: On the Multidecadal Variability in the North Atlantic Basin." Journal of Climate 22, no. 20 (2009): 5298–318. http://dx.doi.org/10.1175/2009jcli2775.1.

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Abstract The nature of the multidecadal variability in the North Atlantic basin is investigated through detailed analysis of multicentury integrations performed using the low-resolution version of the Community Climate System Model, version 3 (CCSM3), a modern atmosphere–ocean coupled general circulation model. Specifically, the results of control simulations under both preindustrial and present-day perpetual seasonal cycle conditions are compared to each other and also to the results of five simulations with increasing CO2 concentration scenarios. In the absence of greenhouse gas–induced warm
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Wu, Yang, Xiaoming Zhai, and Zhaomin Wang. "Impact of Synoptic Atmospheric Forcing on the Mean Ocean Circulation." Journal of Climate 29, no. 16 (2016): 5709–24. http://dx.doi.org/10.1175/jcli-d-15-0819.1.

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Abstract The impact of synoptic atmospheric forcing on the mean ocean circulation is investigated by comparing simulations of a global eddy-permitting ocean–sea ice model forced with and without synoptic atmospheric phenomena. Consistent with previous studies, transient atmospheric motions such as weather systems are found to contribute significantly to the time-mean wind stress and surface heat loss at mid- and high latitudes owing to the nonlinear nature of air–sea turbulent fluxes. Including synoptic atmospheric forcing in the model has led to a number of significant changes. For example, w
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Wilson, Earle A., Andrew F. Thompson, Andrew L. Stewart, and Shantong Sun. "Bathymetric Control of Subpolar Gyres and the Overturning Circulation in the Southern Ocean." Journal of Physical Oceanography 52, no. 2 (2022): 205–23. http://dx.doi.org/10.1175/jpo-d-21-0136.1.

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Abstract The subpolar gyres of the Southern Ocean form an important dynamical link between the Antarctic Circumpolar Current (ACC) and the coastline of Antarctica. Despite their key involvement in the production and export of bottom water and the poleward transport of oceanic heat, these gyres are rarely acknowledged in conceptual models of the Southern Ocean circulation, which tend to focus on the zonally averaged overturning across the ACC. To isolate the effect of these gyres on the regional circulation, we carried out a set of numerical simulations with idealized representations of the Wed
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Czaja, Arnaud. "Atmospheric Control on the Thermohaline Circulation." Journal of Physical Oceanography 39, no. 1 (2009): 234–47. http://dx.doi.org/10.1175/2008jpo3897.1.

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Abstract In an attempt to elucidate the role of atmospheric and oceanic processes in setting a vigorous ocean overturning circulation in the North Atlantic but not in the North Pacific, a comparison of the observed atmospheric circulation and net surface freshwater fluxes over the North Atlantic and Pacific basins is conducted. It is proposed that the more erratic meridional displacements of the atmospheric jet stream over the North Atlantic sector is instrumental in maintaining high surface salinities in its subpolar gyre. In addition, it is suggested that the spatial pattern of the net fresh
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Dissertations / Theses on the topic "Circulation subpolaire"

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Petit, Tillys. "Caractérisation de la circulation autour, au-dessus et à travers (via des zones de fracture) la dorsale de Reykjanes." Thesis, Brest, 2018. http://www.theses.fr/2018BRES0061/document.

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La dorsale de Reykjanes est une structure topographique majeure de l’océan Atlantique Nord qui s’étend de l’Islande à la zone de fracture de Charlie Gibbs. Située entre le bassin d’Islande et la mer d’Irminger, la dorsale de Reykjanes influence fortement la circulation du gyre subpolaire et est une porte d’entrée vers les zones de convection profondes. Cependant, la circulation et la répartition des masses d’eau à travers la dorsale de Reykjanes n’ont jamais été directement quantifiées, de sorte que la caractérisation de la connexion entre le bassin d’Islande et la mer d’Irminger est encore in
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Talandier, Claude. "La dynamique du courant profond de bord ouest dans l'Atlantique Nord et son influence sur la circulation méridienne moyenne." Thesis, Brest, 2015. http://www.theses.fr/2015BRES0020/document.

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Cette thèse s’intéresse au courant profond de bord ouest dans l’Atlantique Nord, le Deep Western Boundary Current (DWBC). Ce courant transporte des eaux denses, formées dans la gyre subpolaire, vers l’équateur et constitue une des composantes majeures de la circulation méridienne Atlantique, l’AMOC (pour Atlantic Meridional Overturning Circulation). Cette circulation contribue au transport de chaleur vers les hautes latitudes et stabilise le climat actuel. L’AMOC calculée dans différents modèles de circulation générale de l’océan présente une diversité dans son intensité, sa structure spatiale
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Bouinot, Thomas. "Variabilité de la circulation méridienne dans l’Océan Atlantique Nord au cours des 2000 dernières années." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112322/document.

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L’objectif de ce travail était d’étudier la variabilité de la circulation océanique méridienne aux échelles de temps pluri décennales dans l’océan Atlantique nord au cours des deux mille dernières années, ainsi que son lien avec la variation de l’extension des gyres subtropicales et subpolaires. J’ai donc étudié, à partir de carottes de sédiments marins à fort taux de sédimentation, l’évolution de la température des eaux de surface et de la stratification de la colonne d’eau en lien avec le fonctionnement des gyres subpolaire et subtropicale.Compte tenu des difficultés spécifiques à la période
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Boisséson, Éric de. "Les eaux modales du gyre subpolaire de l’Atlantique Nord : origine, formation, variabilité." Brest, 2010. http://www.theses.fr/2010BRES2001.

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Les Eaux Modales du gyre subpolaire de l’Atlantique Nord sont des éléments importants de la circulation de surface océanique. Jusqu’à présent, le cycle de vie de ces masses d’eau n’a été décrit qu’à partir d’observations collectées et moyennées sur plusieurs décennies. Ces descriptions n’abordent pas les échelles de temps de ce cycle et lissent les signaux de variabilité. Cette thèse aborde donc ces deux aspects grâce à l’analyse des champs du modèle ORCAQ25-G70 qui complète l’analyse des observations. L’analyse lagrangienne des champs ORCAO25-G70 permet de mettre en évidence le rôle prépondér
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Desbruyères, Damien. "Variabilité de la circulation méridienne de retournement et du contenu de chaleur dans le gyre subpolaire de l'Atlantique Nord." Thesis, Brest, 2013. http://www.theses.fr/2013BRES0074/document.

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La circulation méridienne de retournement (MOC) de l’Atlantique Nord est une composante clé du système climatique global, via son rôle dans la redistribution de chaleur, d’eau douce et de propriétés chimiques entre hautes et basses latitudes. Aux moyennes et hautes latitudes, le Courant Nord-Atlantique(NAC) forme la branche haute de la MOC. Il s’écoule vers le nord-est à la frontière des gyres subpolaire et subtropical, et se divise en deux branches principales dans l’est du gyre subpolaire : une branche nord qui recircule vers l’ouest dans le gyre subpolaire et une branche sud qui alimente le
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Gourcuff, Claire. "Étude de la variabilité de la circulation du gyre subpolaire de l’Atlantique Nord à partir des données Ovide et des mesures satellitaires." Brest, 2008. http://www.theses.fr/2008BRES2042.

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Le gyre subpolaire de l’Atlantique Nord décrit par la circulation cyclonique à grande échelle entre 50°N et 63°N joue un rôle clé dans la variabilité du climat. Le programme Ovide contribue à l’observation des éléments de circulation dans cette région, par le biais notamment de la répétition d’une radiale de mesures tous les deux ans en été depuis 2002 entre le Groenland et le Portugal, suivant un trajet proche de la section Fourex (A25) réalisée en août 1997. Pour estimer les transports à travers les sections, on utilise un modèle inverse géostrophique en boite, contraint par des mesures dire
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Bouinot, Thomas. "Variabilité de la circulation méridienne dans l'Océan Atlantique Nord au cours des 2000 dernières années." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00679528.

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L'objectif de ce travail était d'étudier la variabilité de la circulation océanique méridienne aux échelles de temps pluri décennales dans l'océan Atlantique nord au cours des deux mille dernières années, ainsi que son lien avec la variation de l'extension des gyres subtropicales et subpolaires. J'ai donc étudié, à partir de carottes de sédiments marins à fort taux de sédimentation, l'évolution de la température des eaux de surface et de la stratification de la colonne d'eau en lien avec le fonctionnement des gyres subpolaire et subtropicale.Compte tenu des difficultés spécifiques à la période
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Ballini, Marine. "Etude des variations millénaires de la dynamique des eaux profondes dans l'Atlantique Nord pendant la dernière période glaciaire : approche magnétique, minéralogique et géochimique." Paris 11, 2006. http://www.theses.fr/2006PA112110.

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Auger, Matthis. "Variability and Changes of Hydrography and Circulation in the Subpolar Southern Ocean." Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS086.

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L’océan Austral est une région centrale pour la circulation océanique globale et le climat. Il est cependant également en première ligne du changement climatique, notamment par son absorption importante de chaleur et de carbone anthropique. Par conséquent, l’océan Austral a connu de grands changements dans sa structure hydrographique et sa circulation dans les dernières décennies. Sa région subpolaire, au sud du courant circumpolaire Antarctique, abrite une circulation grande échelle importante pour la production des masses d'eau et leur contenu de chaleur et de carbone, pour les interactions
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Corbière, Antoine. "Variabilité interannuelle à décennale du cycle océanique du carbone dans le gyre subpolaire de l'Océan Atlantique Nord." Paris 6, 2008. http://www.theses.fr/2008PA066568.

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L’océan représente un puits majeur de carbone vis-à-vis de l’accroissement de CO2 atmosphérique, mais l’évolution à long terme de ce puits est mal connue. Ce travail vise donc à analyser son évolution dans l’Atlantique nord à l’aide de données biogéochimiques et hydrologiques collectées entre 1993 et 2007. Dans le gyre subpolaire de l'Atlantique nord, il est montré que la fugacité océanique du CO2 (fCO2oc) a augmenté plus rapidement dans l’océan que dans l’atmosphère sur la période 1993-2007. Pour la période 1993-2003, l’augmentation est due au réchauffement des eaux de surface, tandis q’entre
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Books on the topic "Circulation subpolaire"

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Tesdal, Jan-Erik. Circulation changes associated with freshwater and heat content variability and implications for biological productivity in the subpolar North Atlantic Ocean. [publisher not identified], 2020.

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Holliday, N. Penny, and Stephanie Henson. The Marine Environment. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780199233267.003.0001.

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The growth, distribution, and variability of phytoplankton populations in the North Atlantic are primarily controlled by the physical environment. This chapter provides an overview of the regional circulation of the North Atlantic, and an introduction to the key physical features and processes that affect ecosystems, and especially plankton, via the availability of light and nutrients. There is a natural seasonal cycle in primary production driven by physical processes that determine the light and nutrient levels, but the pattern has strong regional variations. The variations are determined by
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Book chapters on the topic "Circulation subpolaire"

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Schott, Friedrich A., and Peter Brandt. "Circulation and deep water export of the subpolar North Atlantic during the 1990's." In Ocean Circulation: Mechanisms and Impacts—Past and Future Changes of Meridional Overturning. American Geophysical Union, 2007. http://dx.doi.org/10.1029/173gm08.

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Gascard, J. C. "Subpolar Circulation, Deep Water Formation and Air — Sea — Ice Interactions in Labrador and Greenland Seas." In Current Issues in Climate Research. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-009-5494-6_19.

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Kumar, Vinay, and Robert Ross. "Recent Changes in Temperature and Maximum Snow Cover Days over the Northern Hemisphere with a Focus on Alaska." In Global Warming - A Concerning Component of Climate Change [Working Title]. IntechOpen, 2024. http://dx.doi.org/10.5772/intechopen.1004003.

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One aspect of climate variability is the shift in seasonal change, with a given season arriving early or late. However, this shift in season is location-dependent and affects local ecology. Over subpolar regions, the change in temperature is very much associated with the regional and local variability of snow-caps, sea ice near the pole, pole-ward transportation of heat, cloud cover, and wind circulation. Based on a 36-year analysis of skin temperature, we found that the lowest temperature occurred in March rather than in February. Additionally, the maximum snow cover day has shifted from Marc
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Lenton, Tim. "On Thin Ice." In Positive Tipping Points. Oxford University PressOxford, 2025. https://doi.org/10.1093/oso/9780198875789.003.0004.

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Abstract ‘On Thin Ice’ explains how we are now heading towards climate tipping points of our own making. Climate change is an existential risk management problem, where we need to pay special attention to high impact events. Most risky of all are climate tipping points leading to deeply damaging, often abrupt and/or irreversible changes. Assessment of the risk they pose keeps escalating: twenty years ago, climate scientists thought tipping points would only be a risk at 4°C of global warming. Now, at just over 1°C global warming, evidence suggests we are already approaching tipping points. Thi
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Conference papers on the topic "Circulation subpolaire"

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Mandal, Gagan, and Shail Vijeta Ekka. "Unraveling the Influence of the Atlantic Subpolar Gyre on the Thermohaline Circulation in the Past 20,000 Years." In ECAS 2023. MDPI, 2023. http://dx.doi.org/10.3390/ecas2023-15116.

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Reports on the topic "Circulation subpolaire"

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Ramsey, Andree L., Heather H. Furey, and Amy S. Bower. Overturning of the Subpolar North Atlantic Program (OSNAP): RAFOS Float Data Report June 2014 - January 2019. Woods Hole Oceanographic Institution, 2022. http://dx.doi.org/10.1575/1912/29540.

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The Overturning in the Subpolar North Atlantic Program (OSNAP) is an international effort started in 2014 dedicated to achieving a better understanding of the link between dense-water formation and the meridional overturning circulation in the high-latitude North Atlantic. Moorings, gliders, and subsurface acoustically-tracked RAFOS floats have been used to collect temperature, salinity, and current data across the Labrador Sea, Irminger Sea, Reykjanes Ridge, Iceland Basin, Rockall-Hatton Plateau, and Rockall Trough. The specific objective of the OSNAP float program is to gather information on
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