Littérature scientifique sur le sujet « Indian Ocean Gyre »
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Articles de revues sur le sujet "Indian Ocean Gyre"
Molinari, John, et David Vollaro. « A Subtropical Cyclonic Gyre Associated with Interactions of the MJO and the Midlatitude Jet ». Monthly Weather Review 140, no 2 (février 2012) : 343–57. http://dx.doi.org/10.1175/mwr-d-11-00049.1.
Texte intégralBEHERA, S. K., et P. S. SALVEKAR. « A numerical modelling study of the interannual variability in the Indian Ocean ». MAUSAM 46, no 4 (2 janvier 2022) : 409–22. http://dx.doi.org/10.54302/mausam.v46i4.3325.
Texte intégralDavis, Russ E. « Intermediate-Depth Circulation of the Indian and South Pacific Oceans Measured by Autonomous Floats ». Journal of Physical Oceanography 35, no 5 (1 mai 2005) : 683–707. http://dx.doi.org/10.1175/jpo2702.1.
Texte intégralKarstensen, Johannes, et Detlef Quadfasel. « Water subducted into the Indian Ocean subtropical gyre ». Deep Sea Research Part II : Topical Studies in Oceanography 49, no 7-8 (janvier 2002) : 1441–57. http://dx.doi.org/10.1016/s0967-0645(01)00160-6.
Texte intégralPalastanga, V., H. A. Dijkstra et W. P. M. de Ruijter. « Inertially Induced Connections between Subgyres in the South Indian Ocean ». Journal of Physical Oceanography 39, no 2 (1 février 2009) : 465–71. http://dx.doi.org/10.1175/2008jpo3872.1.
Texte intégralVozchikov, Lev M., et Lab Selena. « Experimental Drift Mapping of Indian Ocean Gyre Aircraft Debris ». Open Journal of Applied Sciences 06, no 02 (2016) : 95–99. http://dx.doi.org/10.4236/ojapps.2016.62010.
Texte intégralPattiaratchi, Charitha, Mirjam van der Mheen, Cathleen Schlundt, Bhavani E. Narayanaswamy, Appalanaidu Sura, Sara Hajbane, Rachel White, Nimit Kumar, Michelle Fernandes et Sarath Wijeratne. « Plastics in the Indian Ocean – sources, transport, distribution, and impacts ». Ocean Science 18, no 1 (4 janvier 2022) : 1–28. http://dx.doi.org/10.5194/os-18-1-2022.
Texte intégralScussolini, P., et E. van Sebille. « Paleo Agulhas rings enter the subtropical gyre during the penultimate deglaciation ». Climate of the Past Discussions 9, no 2 (11 avril 2013) : 2095–114. http://dx.doi.org/10.5194/cpd-9-2095-2013.
Texte intégralLambert, Erwin, Dewi Le Bars et Wilhelmus P. M. de Ruijter. « The connection of the Indonesian Throughflow, South Indian Ocean Countercurrent and the Leeuwin Current ». Ocean Science 12, no 3 (2 juin 2016) : 771–80. http://dx.doi.org/10.5194/os-12-771-2016.
Texte intégralWang, Jinbo, Matthew R. Mazloff et Sarah T. Gille. « The Effect of the Kerguelen Plateau on the Ocean Circulation ». Journal of Physical Oceanography 46, no 11 (novembre 2016) : 3385–96. http://dx.doi.org/10.1175/jpo-d-15-0216.1.
Texte intégralThèses sur le sujet "Indian Ocean Gyre"
Getzlaff, Klaus. « Variability in the South Indian Ocean gyre circulation derived from Argo floats ». Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/69047/.
Texte intégralThibault, Margot. « Composition, abundance, origin and distribution of plastic pollution accumulated in the Southern Indian Ocean gyre ». Electronic Thesis or Diss., La Réunion, 2024. https://elgebar.univ-reunion.fr/login?url=http://thesesenligne.univ.run/24_01_M_THIBAULT.pdf.
Texte intégralThe majority of mismanaged plastic waste enters the marine environment. Once in the oceans, these plastics drift until reaching subtropical convergence zones, where they accumulate to form “Garbage Patches”. Five zones have been discovered, including one in the southern Indian Ocean. This latter patch has undergone limited surface observation studies, and several predicted models indicate a different location, placing it either west or east of the basin. Supposedly the second most polluted “Garbage Patch” after the North Pacific, it is crucial to identify it for effective intervention accurately. Within this context, the doctoral project aimed to determine the composition, concentration, and origin of plastic debris accumulated in the Southwest Indian Ocean. Since the project's inception, 19 oceanographic campaigns have been conducted to visually monitor macro-debris (> 2.5 cm) and collect microplastics by manta trawl deployment (500 μm – 5 mm). Surveys of marine debris (macro-meso (5 mm – 2.5 cm) beached on uninhabited, remote islands have also been carried out to assess the concentration that does not remain on the surface. Furthermore, a long-term study of plastic pollution was initiated by identifying bio-indicator species in the region. All observations have been compared or complemented with plastic dispersion predictive models in the Indian Ocean. Of all the marine debris collected or observed, 95% consisted of plastics. Among plastics, the predominant subcategory was pre-existing fragmented hard plastics found on the ocean surface, beached on uninhabited islands, and ingested by bio-indicator species. The primary composition of these polymers was polyethylene and polypropylene, and it did not differ between the ocean surface and beaches. A concentration gradient of microplastics was also identified, ranging from 10^3 items.km^-2 at 40°E to 10^5 items.km^-2 at 65°E on latitudes 30/33°S. This gradient has been confirmed by plastic dispersion predicted models, although they tend to underestimate it. In addition, some of the macroplastics stranded on the islands originated mainly from Southeast Asian food packaging. Three species have been identified for long-term monitoring of plastic pollution in the region: loggerhead turtles (Caretta caretta), Barau's petrels (Pterodroma baraui), and tropical shearwaters (Puffinus baillonni). Future studies should include increasing sampling in the central and eastern parts of the Indian Ocean basin during different seasons, studying the impact of plastic debris on associated ecosystems, and developing tailored management solutions
Palmer, Matthew D. « Decadal variability of the subtropical gyre and deep meridional overturning circulation of the Indian Ocean ». Thesis, University of Southampton, 2005. https://eprints.soton.ac.uk/25122/.
Texte intégralThomalla, S. J. « Phytoplankton distribution and nitrogen dynamics in the southwest Indian subtropical gyre and Southern Ocean waters ». Master's thesis, University of Cape Town, 2001. http://hdl.handle.net/11427/6451.
Texte intégralLeseurre, Coraline. « Mécanismes de contrôle de l’absorption de CO2 anthropique et de l’acidification des eaux dans les océans Atlantique Nord et Indien Austral ». Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS484.
Texte intégralThe ocean plays a very large role in the climate system due to the large exchange of carbon dioxide with the atmosphere and the recent shift of the exchanges towards a large oceanic sink of CO2 in the Anthropocene era. The North Atlantic and the Southern oceans are acknowledged to be major repositories of this anthropogenic carbon (Cant). Indeed, ~25% of the Cant penetrates through the surface waters of the North Atlantic and ~40% reside in the intermediate and mode waters of the Southern ocean. It has been established that this oceanic carbon sink presents a large time variability of seasonal to multidecadal times scales, but that is poorly known, resulting in large uncertainties in long term climate predictions. It has thus been recommended to focus observing efforts in the regions where the absorption of CO2 is large: the North Atlantic and the Southern oceans. In this frame, the study of the seasonal to decadal variability of the oceanic carbonate system is required to better understand the effects of current changes on the oceanic carbon cycle. I use data collected since the mid-1990s until 2021 within the framework of the two French surveys SURATLANT and OISO, in order to describe the spatial and temporal variability of parameters of the carbonate system (AT, CT, fCO2, pH and δ13CDIC) in the North Atlantic subpolar gyre (NASPG) as well as in the Indian sector of the Southern Ocean. I studied the physical and biogeochemical processes that control the evolution of fCO2, water acidification and the oceanic Suess effect, separating the anthropogenic induced changes from natural variability. The long-term evolution of fCO2 and pH during the period samples has a similar magnitude to the atmospheric CO2 increase and the overall surface ocean trends. Nonetheless, results can differ from this average view, depending on season, the particular region or specific periods. Cant increase has been identified as the prime driver controlling the observed changes in fCO2 and pH, but other processes modulate these tendencies. For instance, the warming (cooling) of the surface waters will increase (restrain) the increase of fCO2 and the decrease of pH. Furthermore, an increase of AT has been identified in both regions, which partially limit the increase of ocean acidification induced by Cant increase. Also, the data suggest that changes have been smaller since 2010, with even some reversal in the increase in fCO2 and ocean acidification, both in the NASPG than in the Antarctic region of the Southern Indian ocean. 13CDIC data seem to reinforce these conclusions and to identify a different Suess effect in the two regions. This additional parameter has nonetheless been less sampled and the current data do not allow to clearly identify the change since 2010. My work supports the need to continue the long-term observations in these key regions for anthropogenic CO2 export to the deep ocean, in order to better characterize the changes in anthropogenic carbon, the oceanic Suess effect, and the acidification of surface waters for the next decades
Dencausse, Guillaume. « Échanges indo-atlantiques d’eau subtropicale en relation aux structures frontales et de mésoéchelle : utilisation de la série temporelle altimétrique de niveau de la mer ». Brest, 2009. http://www.theses.fr/2009BRES2051.
Texte intégralIndo-Atlantic exchanges of subtropical water play a crucial role in controlling global climate. The intense mesoscale activity south of Africa contributes to these exchanges, yet remains poorly described. A commonly accepted circulation scheme of those waters assmues that the subtropical gyres of the neighbouring oceans are partially connected, forming a super-gyre. Using an altimeter-derived sea-level time series spanning over 12 years, we study the exchanges through the “northern branch” of the super-gyre (Indian to Atlantic ocean), and through the “southern branch” (opposite direction). Regarding the northern branch, an initial study of the Agulhas Current Retroflection yields a statistical description of its behaviour, and shows the disrupting role of local bathymetry. Then, a thorough tracking of all Agulhas Rings trajectories shed by the Retroflection yields 3 typical paths, linked to regional bathymetry, whose contributions to inter-ocean exchanges are evaluated. Applying the same methods to regional simulations shows inadequate behaviour of the Retroflection and ring trajectories. Exchanges through the southern branch of the super-gyre could be associated with the a jet-like flow of the Subtropical Front, the question of its continuity thus being crucial. If the front seems continuous in the mean sea level field, applying the method developed to locate the mean front to weekly SSH fields shows that mesoscale features west of the retroflection strongly disturb its path, making it discontinuous. Exchanges mechanisms through this branch are thus probably more complex
Livres sur le sujet "Indian Ocean Gyre"
S, Salvekar P., et Indian Institute of Tropical Meteoroloy., dir. Westward moving mesoscale gyres in the equatorial Indian Ocean during mid-monsoon season as identified from MSMR winds. Pune : Indian Institute of Tropical Meteorology, 2003.
Trouver le texte intégralP, Rahul Chand Reddy, et Indian Institute of Tropical Meteorology., dir. Evidence of twin gyres in the Indian Ocean : New insights using reduced gravity model forced by daily winds. Pune : [Indian Institute of Tropical Meteorology], 2003.
Trouver le texte intégralChapitres de livres sur le sujet "Indian Ocean Gyre"
Mladenov, Philip V. « 1. The oceanic environment ». Dans Marine Biology : A Very Short Introduction, 4–21. Oxford University Press, 2020. http://dx.doi.org/10.1093/actrade/9780198841715.003.0002.
Texte intégral« Pareto Optimization for Rossby Wave Pattern Impacts on MH370 Debris ». Dans Genetic Algorithms and Remote Sensing Technology for Tracking Flight Debris, 251–80. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1920-2.ch012.
Texte intégralActes de conférences sur le sujet "Indian Ocean Gyre"
Harms, Natalie, Niko Lahajnar, Birgit Gaye, Ulrich Schwarz-Schampera et Kay-Christian Emeis. « Nitrogen Cycle and Particulate Matter Fluxes in the Indian Ocean Subtropical Gyre ». Dans Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.957.
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