Littérature scientifique sur le sujet « Ventilation abyssale »
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Articles de revues sur le sujet "Ventilation abyssale"
Mirabel, A. P., et N. V. Vakulenko. « On advective model of the ventilated thermocline ». Океанология 59, no 1 (18 avril 2019) : 5–11. http://dx.doi.org/10.31857/s0030-15745915-11.
Texte intégralLago, Véronique, et Matthew H. England. « Projected Slowdown of Antarctic Bottom Water Formation in Response to Amplified Meltwater Contributions ». Journal of Climate 32, no 19 (27 août 2019) : 6319–35. http://dx.doi.org/10.1175/jcli-d-18-0622.1.
Texte intégralOrsi, Alejandro H., Stanley S. Jacobs, Arnold L. Gordon et Martin Visbeck. « Cooling and ventilating the Abyssal Ocean ». Geophysical Research Letters 28, no 15 (1 août 2001) : 2923–26. http://dx.doi.org/10.1029/2001gl012830.
Texte intégralJohnson, Gregory C., Sarah G. Purkey et John L. Bullister. « Warming and Freshening in the Abyssal Southeastern Indian Ocean* ». Journal of Climate 21, no 20 (15 octobre 2008) : 5351–63. http://dx.doi.org/10.1175/2008jcli2384.1.
Texte intégralOkazaki, Y., T. Sagawa, H. Asahi, K. Horikawa et J. Onodera. « Ventilation changes in the western North Pacific since the last glacial period ». Climate of the Past 8, no 1 (3 janvier 2012) : 17–24. http://dx.doi.org/10.5194/cp-8-17-2012.
Texte intégralOkazaki, Y., T. Sagawa, H. Asahi, K. Horikawa et J. Onodera. « Ventilation changes in the western North Pacific since the last glacial period ». Climate of the Past Discussions 7, no 4 (18 août 2011) : 2719–39. http://dx.doi.org/10.5194/cpd-7-2719-2011.
Texte intégralVan Roekel, Luke P., Taka Ito, Patrick T. Haertel et David A. Randall. « Lagrangian Analysis of the Meridional Overturning Circulation in an Idealized Ocean Basin ». Journal of Physical Oceanography 39, no 9 (1 septembre 2009) : 2175–93. http://dx.doi.org/10.1175/2009jpo4110.1.
Texte intégralVreugdenhil, Catherine A., Andrew McC Hogg, Ross W. Griffiths et Graham O. Hughes. « Adjustment of the Meridional Overturning Circulation and Its Dependence on Depth of Mixing ». Journal of Physical Oceanography 46, no 3 (mars 2016) : 731–47. http://dx.doi.org/10.1175/jpo-d-15-0050.1.
Texte intégralJenkins, William J., Kathryn L. Elder, Ann P. McNichol et Karl von Reden. « The Passage of the Bomb Radiocarbon Pulse into the Pacific Ocean ». Radiocarbon 52, no 3 (2010) : 1182–90. http://dx.doi.org/10.1017/s0033822200046257.
Texte intégralDoney, Scott C., et William J. Jenkins. « Ventilation of the Deep Western Boundary Current and Abyssal Western North Atlantic : Estimates from Tritium and3He Distributions ». Journal of Physical Oceanography 24, no 3 (mars 1994) : 638–59. http://dx.doi.org/10.1175/1520-0485(1994)024<0638:votdwb>2.0.co;2.
Texte intégralThèses sur le sujet "Ventilation abyssale"
Akhoudas, Camille. « Un nouveau regard sur la dynamique de l’océan Austral et ses interactions avec la cryosphère révélé par une approche isotopique ». Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS464.
Texte intégralThe Southern Ocean is a key component in global ocean circulation and the Earth's climate system. Despite the increase of in situ observations in this remote region since the 1990s (notably with the « satellite era » and major international observation programs such as WOCE, CLIVAR, GO-SHIP, or ARGO), this immense ocean remains largely unknown. However, it is essential to observe and understand the mechanisms of its dynamics as well as its variability with the aim to predict the future evolution of the climate system. In particular, one important characteristic of the Southern Ocean is that it is one of the main sites of deep ocean ventilation, which allows redistribution and sequestration of heat, freshwater, carbon, oxygen, and nutrients. This ventilation process is mainly associated with a vertical circulation connecting the ocean surface to the abyss, fueled by intense interactions and exchanges of energy and buoyancy fluxes between atmosphere, ocean and cryosphere. In this thesis, I apprehend some aspects of the Southern Ocean dynamics by providing a mechanistic view of large-scale circulation and its ongoing changes. The approach I use throughout this thesis is based on observations of stable water isotopes, a passive tracer commonly used in a large number of earth science disciplines, but until recently only sparsely used in physical oceanography. Stable water isotopes constitute a robust tool which, as a tracer of the origin of water, help to better characterize the different components of the hydrological cycle as well as its evolution. In particular, the isotopic composition of seawater represents an important imprint of water masses, containing information on the conditions of their formation and their evolution. In this thesis, beyond the important methodological work at sea and in the laboratory for the sampling, analysis and calibration of isotopic measurements, I use the stable water isotopes in combination with other more conventional tracers to apprehend, with a new perspective, the questions of the role of interactions between the Southern Ocean and the Antarctic Ice Sheet in large-scale circulation, the signature of surface waters in the abyss, or even the impact of changes in atmospheric or cryosphere regimes on the surface ocean. Beyond the only use of stable water isotopes, original approaches have allowed me to document melting and refreezing of one of the largest ice shelves in the world, which influences the characteristics of the dense waters, precursors of abyssal waters produced in the Weddell Sea. My results also reveal the proportion of these dense waters in bottom water formation in the Atlantic sector of the Southern Ocean. We detail the processes that lead to the formation of bottom waters and with this new insight, we demonstrate that past estimates of bottom water production, in apparent contradiction, were actually focusing on different processes. Finally, I propose to quantify the changes in freshwater inputs over the past three decades that influence the trends in surface properties in the Indian sector of the Southern Ocean. The results demonstrate that changes in the precipitation regime explain changes in the surface ocean characteristics impacting stratification with consequences for large-scale water mass formation and overturning circulation in the Southern Ocean