Academic literature on the topic 'Indian Ocean Gyre'

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Journal articles on the topic "Indian Ocean Gyre"

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Molinari, John, and David Vollaro. "A Subtropical Cyclonic Gyre Associated with Interactions of the MJO and the Midlatitude Jet." Monthly Weather Review 140, no. 2 (2012): 343–57. http://dx.doi.org/10.1175/mwr-d-11-00049.1.

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This paper describes a large cyclonic gyre that lasted several days in the northwest Pacific during July 1988. Cyclonic winds at 850 hPa extended beyond the 2000-km radius with a radius of maximum winds of 700–800 km. The gyre exhibited clear skies within and north of its center. Active convection extended 4000 km in longitude to its south. The Madden–Julian oscillation (MJO) was in its active phase in the Indian Ocean prior to gyre formation. Consistent with earlier studies, diabatic heating in the MJO was associated with an anomalous upper-tropospheric westerly jet over the northeast Asian c
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BEHERA, S. K., and P. S. SALVEKAR. "A numerical modelling study of the interannual variability in the Indian Ocean." MAUSAM 46, no. 4 (2022): 409–22. http://dx.doi.org/10.54302/mausam.v46i4.3325.

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A simple reductA1 gravity wind-driven ocean circulation model is used to study the interannual variability in the upper layer of the Indian Ocean (24°S-23°N and 3S°E-IIS0E). The monthly mean wind stress for the period 1977-1986 are used as a forcing in the model. The model reproduces most of the observed features of the annual cycle of the upper layer circulation in the Indian Ocean when was forced with the ten-year average monthly mean wind. The circulation features and the model upper layer thickness show considerable interannual variability in most part of the basin; in particular, the Soma
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Davis, Russ E. "Intermediate-Depth Circulation of the Indian and South Pacific Oceans Measured by Autonomous Floats." Journal of Physical Oceanography 35, no. 5 (2005): 683–707. http://dx.doi.org/10.1175/jpo2702.1.

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Abstract As part of the World Ocean Circulation Experiment, 306 autonomous floats were deployed in the tropical and South Pacific Ocean and 228 were deployed in the Indian Ocean to observe the basinwide circulation near 900-m depth. Mean velocities, seasonal variability, and lateral eddy diffusivity from the resultant 2583 float-years of data are presented. Area averages, local function fits, and a novel application of objective mapping are used to estimate the mean circulation. Patterns of mean circulation resemble those at the surface in both basins. Well-developed subtropical gyres, twice a
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Karstensen, Johannes, and Detlef Quadfasel. "Water subducted into the Indian Ocean subtropical gyre." Deep Sea Research Part II: Topical Studies in Oceanography 49, no. 7-8 (2002): 1441–57. http://dx.doi.org/10.1016/s0967-0645(01)00160-6.

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Palastanga, V., H. A. Dijkstra, and W. P. M. de Ruijter. "Inertially Induced Connections between Subgyres in the South Indian Ocean." Journal of Physical Oceanography 39, no. 2 (2009): 465–71. http://dx.doi.org/10.1175/2008jpo3872.1.

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Abstract A barotropic shallow-water model and continuation techniques are used to investigate steady solutions in an idealized South Indian Ocean basin containing Madagascar. The aim is to study the role of inertia in a possible connection between two subgyres in the South Indian Ocean. By increasing inertial effects in the model, two different circulation regimes are found. In the weakly nonlinear regime, the subtropical gyre presents a recirculation cell in the southwestern basin, with two boundary currents flowing westward from the southern and northern tips of Madagascar toward Africa. In
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Pattiaratchi, Charitha, Mirjam van der Mheen, Cathleen Schlundt, et al. "Plastics in the Indian Ocean – sources, transport, distribution, and impacts." Ocean Science 18, no. 1 (2022): 1–28. http://dx.doi.org/10.5194/os-18-1-2022.

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Abstract. Plastic debris is the most common and exponentially increasing human pollutant in the world's ocean. The distribution and impact of plastic in the Pacific and Atlantic oceans have been the subject of many publications but not so the Indian Ocean (IO). Some of the IO rim countries have the highest population densities globally and mismanagement of plastic waste is of concern in many of these rim states. Some of the most plastic-polluted rivers empty into the IO, with all this suggesting that the IO receives a tremendous amount of plastic debris each year. However, the concentration, d
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Vozchikov, Lev M., and 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.

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Scussolini, P., and E. van Sebille. "Paleo Agulhas rings enter the subtropical gyre during the penultimate deglaciation." Climate of the Past Discussions 9, no. 2 (2013): 2095–114. http://dx.doi.org/10.5194/cpd-9-2095-2013.

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Abstract. A maximum in the strength of Agulhas Leakage has been registered at the interface between Indian and South Atlantic oceans during glacial Termination II (T II), presumably transporting the salt and heat necessary to maintain the Atlantic Meridional Overturning Circulation (AMOC) at rates similar to the present day. However, it was never shown whether these were effectively incorporated in the South Atlantic gyre, or whether they retroflected into the Indian and/or Southern Oceans. To solve this question, we investigate the presence of paleo Agulhas rings from a sediment core on the c
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Lambert, Erwin, Dewi Le Bars, and Wilhelmus P. M. de Ruijter. "The connection of the Indonesian Throughflow, South Indian Ocean Countercurrent and the Leeuwin Current." Ocean Science 12, no. 3 (2016): 771–80. http://dx.doi.org/10.5194/os-12-771-2016.

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Abstract. East of Madagascar, the shallow “South Indian Ocean Counter Current (SICC)” flows from west to east across the Indian Ocean against the direction of the wind-driven circulation. The SICC impinges on west Australia and enhances the sea level slope, strengthening the alongshore coastal jet: the Leeuwin Current (LC), which flows poleward along Australia. An observed transport maximum of the LC around 22° S can likely be attributed to this impingement of the SICC. The LC is often described as a regional coastal current that is forced by an offshore meridional density gradient or sea surf
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Wang, Jinbo, Matthew R. Mazloff, and Sarah T. Gille. "The Effect of the Kerguelen Plateau on the Ocean Circulation." Journal of Physical Oceanography 46, no. 11 (2016): 3385–96. http://dx.doi.org/10.1175/jpo-d-15-0216.1.

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AbstractThe Kerguelen Plateau is a major topographic feature in the Southern Ocean. Located in the Indian sector and spanning nearly 2000 km in the meridional direction from the polar to the subantarctic region, it deflects the eastward-flowing Antarctic Circumpolar Current and influences the physical circulation and biogeochemistry of the Southern Ocean. The Kerguelen Plateau is known to govern the local dynamics, but its impact on the large-scale ocean circulation has not been explored. By comparing global ocean numerical simulations with and without the Kerguelen Plateau, this study identif
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Dissertations / Theses on the topic "Indian Ocean Gyre"

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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/.

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Thibault, 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.

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La plupart des déchets plastiques mal gérés pénètrent dans l'environnement marin. Une fois dans les océans, ces plastiques dérivent jusqu'à atteindre des zones de convergence subtropicales, où ils s'accumulent pour former des « Garbage Patch ». Cinq de ces zones ont été découvertes,dont l’une dans le sud de l'océan Indien. Cette dernière a fait l'objet de peu d'études d'observation en surface, et plusieurs modèles de dispersion indiquent une localisation différente, la plaçant soit à l’ouest ou à l’est du bassin. Supposée être la deuxième « Garbage Patch » la plus polluée après celle du Pacifi
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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/.

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The work presented in this Thesis concerns the large-scale circulation of the Indian Ocean and follows three lines of investigation: (i) decadal variability of the subtropical gyre circulation; (ii) decadal variability of the deep meridional overturning circulation (MOC); and (iii) the influence of diapycnal diffusivity on quasi-steady MOC states. The decadal variability of the subtropical gyre transport over the ocean interior (away from boundary currents) is investigated using hydrographic data from 32°S. Estimates of the relative gyre transports are: 41 ± 5.1 Sv (1 Sv = 106 m3s-1) for 1987,
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Thomalla, 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.

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Leseurre, 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.

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L’océan joue un rôle important dans le système climatique du fait des importants échanges de gaz carbonique avec l’atmosphère et du déplacement de ses échanges vers un puits océanique lors de l’Anthropocène. Les océans Atlantique Nord et Austral sont reconnus comme étant des acteurs majeurs de cette séquestration du carbone anthropique (Cant). En effet, ~25% du Cant pénètre dans les eaux de surface de l’Atlantique Nord et ~40% résident dans les eaux modales et intermédiaires de l’océan Austral. Il est clairement établi que le puits de carbone présente des variations dans le temps mais mal conn
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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.

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Les échanges indo-atlantiques d’eau subtropicale jouent un rôle essentiel dans le contrôle du climat global. L’intense activité de mésoechelle au sud de l’Afrique contribue fortement à ces échanges, mais reste mal connue. Un schéma de circulation de ces eaux veut que les gyres subtropicaux des océans voisins soient reliés en un super-gyre. A partir d’une série temporelle altimétrique de hauteur de mer de plus de douze ans, nous étudions les échanges par la « branche nord » du super-gyre (Indien vers Atlantique), et par la « branche sud » (sens inverse). Concernant la branche nord, une première
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Books on the topic "Indian Ocean Gyre"

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S, Salvekar P., and Indian Institute of Tropical Meteoroloy., eds. Westward moving mesoscale gyres in the equatorial Indian Ocean during mid-monsoon season as identified from MSMR winds. Indian Institute of Tropical Meteorology, 2003.

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P, Rahul Chand Reddy, and Indian Institute of Tropical Meteorology., eds. Evidence of twin gyres in the Indian Ocean: New insights using reduced gravity model forced by daily winds. [Indian Institute of Tropical Meteorology], 2003.

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Book chapters on the topic "Indian Ocean Gyre"

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Mladenov, Philip V. "1. The oceanic environment." In Marine Biology: A Very Short Introduction. Oxford University Press, 2020. http://dx.doi.org/10.1093/actrade/9780198841715.003.0002.

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The Global Ocean constitutes about 97 per cent of all the water that exists on our planet. It is divided into five regional oceans: the Pacific, Atlantic, Indian, Arctic, and Southern oceans. ‘The oceanic environment’ looks at the structural features of the oceans, the composition of the water, the temperature, the light sources, water pressure, gases, and the living environment they contain. It also discusses the movement of the water throughout the oceans: at the surface in a series of five enormous, roughly circular, wind-driven current systems, or gyres, and at deeper levels, which transpo
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"Pareto Optimization for Rossby Wave Pattern Impacts on MH370 Debris." In Genetic Algorithms and Remote Sensing Technology for Tracking Flight Debris. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-1920-2.ch012.

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This chapter censoriously appraises the comprehensive theories that specify that more concepts are needed to bridge the gap found between the dynamic of the Southern Indian Ocean and the actual MH370 vanishing mechanism. Thus, this chapter is devoted to the Rossby waves, which could attribute to the fact that the MH370 flaperon got to Réunion Island. In this view, Rossby waves generate growth of energy in the west of the ocean gyres and create the strengthening currents on the western side of the ocean basins. Pareto optimization algorithm of the impact power of Rossby waves proves that the fl
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Conference papers on the topic "Indian Ocean Gyre"

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Harms, Natalie, Niko Lahajnar, Birgit Gaye, Ulrich Schwarz-Schampera, and Kay-Christian Emeis. "Nitrogen Cycle and Particulate Matter Fluxes in the Indian Ocean Subtropical Gyre." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.957.

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