Dissertations / Theses on the topic 'Intraseasonal Oscillation in Atmosphere'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Intraseasonal Oscillation in Atmosphere.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
Teng, Haiyan. "Interannual variations of the boreal summer intraseasonal oscillation." Thesis, University of Hawaii at Manoa, 2003. http://proquest.umi.com/pqdweb?index=0&did=765086511&SrchMode=2&sid=2&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1233255418&clientId=23440.
Full textBurton, Kenneth R. "Influence of Antarctic oscillation on intraseasonal variability of large-scale circulations over the Western North Pacific /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Mar%5FBurton.pdf.
Full textBurton, Kenneth R. Jr. "Influence of Antarctic oscillation on intraseasonal variability of large-scale circulations over the Western North Pacific." Thesis, Monterey California. Naval Postgraduate School, 2005. http://hdl.handle.net/10945/2310.
Full textThis study examines Southern Hemisphere mid-latitude wave variations connected to the Antarctic Oscillation (AAO) to establish connections with the 15- to 25-day wave activity in the western North Pacific monsoon trough region. The AAO index defined from the leading empirical orthogonal functions of 700 hPa height anomalies led to seven distinct circulation patterns that vary in conjunction with the 15- to 25-day monsoon trough mode. For nearly one half of the significant events the onset of 15- to 25-day monsoon trough convective activity coincided with a peak negative AAO index and the peak in monsoon trough convection coincided with a peak positive index. The remaining events either occur when the AAO is not significantly varying or when the AAO-related Southern Hemisphere mid-latitude circulations do not match 15- to 25-day transitions. When a significant connection occurs between the Southern Hemisphere mid-latitude circulations related to the AAO and the 15- to 25-day wave activity in the western North Pacific monsoon trough, the mechanism is via equatorward Rossby-wave dispersion. When wave energy flux in the Southern Hemisphere is directed zonally, no connection is established between the AAO and the alternating periods of enhanced and reduced convection in the western North Pacific monsoon trough.
Captain, United States Air Force
McDaniel, Brent. "Intraseasonal Dynamical Evolution of the Northern Annular Mode." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/6965.
Full textAgudelo, Paula A. "Role of Local Thermodynamic Coupling in the Life Cycle of the Intraseasonal Oscillation in the Indo-Pacific Warm Pool." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19834.
Full textZuluaga-Arias, Manuel D. "Spatial and temporal distribution of latent heating in the South Asian monsoon region." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31753.
Full textCommittee Chair: Peter J. Webster; Committee Member: Judith A. Curry; Committee Member: Robert X. Black. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Matthews, Adrian John. "The intraseasonal oscillation." Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358464.
Full textHoyos, Carlos D. "Intraseasonal Variability: Processes, Predictability and Prospects for Prediction." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-04102006-135125/.
Full textDr. Peter J. Webster, Committee Chair ; Dr. Judith A. Curry, Committee Member ; Dr. Robert Dickinson, Committee Member ; Dr. Robert X. Black, Committee Member ; Dr. Predrag Cvitanovic, Committee Member.
Charlesworth, Oliver. "Intraseasonal European climate variability and interactions with the Madden-Julian Oscillation." Thesis, University of East Anglia, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.490613.
Full textValad?o, Cati Elisa de Avila. "Impacts of the Madden-Julian oscillation on intraseasonal precipitation over northeast Brazil." Universidade Federal do Rio Grande do Norte, 2015. http://repositorio.ufrn.br/handle/123456789/20695.
Full textApproved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-13T22:20:59Z (GMT) No. of bitstreams: 1 CatiElisaDeAvilaValadao_TESE.pdf: 22074758 bytes, checksum: 702cc3f01b20335c0a4d7438f5c6a479 (MD5)
Made available in DSpace on 2016-06-13T22:20:59Z (GMT). No. of bitstreams: 1 CatiElisaDeAvilaValadao_TESE.pdf: 22074758 bytes, checksum: 702cc3f01b20335c0a4d7438f5c6a479 (MD5) Previous issue date: 2015-08-14
Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)
The impacts of the Madden?Julian Oscillation (MJO) on precipitation over Northeast Brazil (NEB, also known as Nordeste) are evaluated based on daily raingauge data from 492 stations over 30-year period (1981-2010). Composites of precipitation, outgoing longwave radiation and moisture-flux anomalies are performed for each phase of the MJO based on the Jones?Carvalho MJO index. To distinguish the MJO signal from other patterns of climate variability, daily data are filtered using a 20 - 90 day band-pass filter; only days classified as MJO events are considered in the composites. A preliminary analysis based on precipitation data was conducted for a small scale area located in NEB?s semiarid interior, in an area known as Serid?. The Serid? is one of the driest regions in NEB, and is recognized by the United Nations Convention to Combat Desertification as particularly vulnerable to desertification. Composites of rainfall anomalies were computed for each of the eight phases of the MJO during February-May, which is Serid??s main rainy season. Results showed that the rainfall patterns in Serid? undergo substantial changes (from enhancement to suppression) as the convective center of the MJO propagates eastward. When combining the MJO signals for wet and dry phases, the difference represents about 50 - 150% modulation of the mean rainfall over Serid?. Then a comprehensive analysis of the role of the MJO in modulating the spatiotemporal variation of NEB?s precipitation was performed, considering all four seasons. The results showed strong seasonality of the MJO impact on precipitation. The most spatially coherent signals of precipitation anomalies occurred in the austral summer, when about 80% of the raingauge stations showed increased precipitation during phases 1 - 2 and suppressed precipitation in phases 5 - 6 of the oscillation. Although the MJO impacts precipitation on intraseasonal timescales in all seasons in most locations, these impacts vary in magnitude and depend on the phase of the oscillation. Precipitation anomalies over NEB are explained by the interaction of convectively coupled Kelvin-Rossby waves with the dominant climatic features in each season. During the austral summer and spring, westerly regimes increased precipitation over most NEB. In the austral winter and fall, precipitation anomalies exhibited more complex spatial variability. In these seasons precipitation anomalies in eastern coastal areas depended on the strength of the South Atlantic anticyclone, which is largely modulated by Rossby waves. The strengthening of the anticyclone intensified the convergence of the trade winds in coastal areas and precipitation windward of the coastal range. Conversely, the intensification of the subsidence was responsible for precipitation deficits in the lee side of the range. These conditions were typically observed when easterly regimes dominate over tropical South America and NEB, decreasing moisture flow from the Amazon.
Este estudo tem como objetivo investigar os impactos da oscila??o de Madden-Julian (OMJ) na precipita??o da regi?o Nordeste do Brasil (NEB). Para tanto foram utilizados dados di?rios de precipita??o baseados em 492 pluvi?metros distribu?dos na regi?o e cobrindo um per?odo de 30 anos (1981 ? 2010). As an?lises atrav?s de composi??es de anomalias de precipita??o, radia??o de onda longa e fluxo de umidade, foram obtidas com base no ?ndice da OMJ desenvolvido por Jones-Carvalho. Para distinguir o sinal da OMJ de outros padr?es de variabilidade clim?tica, todos os dados di?rios foram filtrados na escala de 20 ? 90 dias; portanto somente dias classificados como eventos da OMJ foram considerados nas composi??es. Uma an?lise preliminar baseada apenas nos dados de precipita??o foi feita para uma pequena ?rea localizada no interior semi?rido do NEB, conhecida como Serid?. Essa microrregi?o ? uma das ?reas mais secas do NEB e foi reconhecida pela Conven??o das Na??es Unidas para o Combate ? Desertifica??o e Mitiga??o dos Efeitos das Secas como particularmente vulner?vel ? desertifica??o. Composi??es de anomalias de precipita??o foram feitas para cada uma das oito fases da OMJ durante Fevereiro-Maio (principal per?odo chuvoso da microrregi?o). Os resultados mostraram a exist?ncia de varia??es significativas nos padr?es de precipita??o (de precipita??o excessiva ? deficiente) associados ? propaga??o da OMJ. A combina??o dos sinais de precipita??o obtidos durantes as fases ?midas e secas da OMJ mostrou que a diferen?a corresponde cerca de 50 ? 150% de modula??o das chuvas na microrregi?o. Em seguida, uma investiga??o abrangente sobre o papel da OMJ sobre toda a regi?o Nordeste foi feita considerando-se as quatro esta??es do ano. Os resultados mostraram que os impactos da OMJ na precipita??o intrassazonal do NEB apresentam forte sazonalidade. A maior coer?ncia espacial dos sinais de precipita??o ocorreram durante o ver?o austral, quando cerca de 80% das esta??es pluviom?tricas apresentaram anomalias positivas de precipita??o durante as fases 1 ? 2 da OMJ e anomalias negativas de precipita??o nas fases 5 ? 6 da oscila??o. Embora impactos da OMJ na precipita??o intrassazonal tenham sido encontrados na maioria das localidades e em todas as esta??es do ano, eles apresentaram varia??es na magnitude dos sinais e dependem da fase da oscila??o. As anomalias de precipita??o do NEB observadas s?o explicadas atrav?s da intera??o existente entre as ondas de Kelvin-Rossby acopladas convectivamente e as caracter?sticas clim?ticas predominantes sobre a regi?o em cada esta??o do ano. O aumento de precipita??o observado sobre a maior parte do NEB durante o ver?o e primavera austrais encontra-se associado com o fluxo de umidade de oeste (regime de oeste), o qual favorece a atividade convectiva em amplas ?reas da Am?rica do Sul tropical. Por outro lado, as anomalias de precipita??o durante o inverno e outono austrais apresentaram uma variabilidade espacial mais complexa. Durante estas esta??es, as anomalias de precipita??o observadas nas esta??es localizadas na costa leste do NEB dependem da intensidade do anticiclone do Atl?ntico Sul, o qual ? modulado em grande parte por ondas de Rossby. As caracter?sticas topogr?ficas do NEB parecem desempenhar um papel importante na variabilidade observada na precipita??o, principalmente nestas ?reas costeiras. A intensifica??o do anticiclone aumenta a converg?ncia dos ventos al?sios na costa contribuindo para a ocorr?ncia de precipita??o observada ? barlavento do planalto da Borborema. Por outro lado, o aumento da subsid?ncia parece ser respons?vel pelos d?ficits de precipita??o observados ? sotavento. Tais condi??es mostraram-se t?picas durante o predom?nio do regime de leste sobre a regi?o tropical da Am?rica do Sul e o NEB, durante o qual ocorre uma diminui??o no fluxo de umidade proveniente da Amaz?nia.
Drbohlav, Hae-Kyung Lee. "Mechanism of the intraseasonal oscillation in the South Asian summer monsoon region." Thesis, University of Hawaii at Manoa, 2002. http://proquest.umi.com/pqdweb?index=0&did=765064431&SrchMode=1&sid=1&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1209149181&clientId=23440.
Full textRuth, Sarah L. "The quasi-biennial oscillation in the middle atmosphere." Thesis, University of Oxford, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303598.
Full textBatstone, Crispian Peter. "Ocean-atmosphere interactions within the Madden-Julian Oscillation." Thesis, University of East Anglia, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398818.
Full textFraza, Erik. "The Global 3-Dimensional Structure of the Pacific Decadal Oscillation." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1281395658.
Full textKlingaman, Nicholas Pappas. "The intraseasonal oscillation of the Indian summer monsoon : air-sea interactions and the potential for predictability." Thesis, University of Reading, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.501512.
Full textHood, Lon L. "QBO/solar modulation of the boreal winter Madden-Julian oscillation: A prediction for the coming solar minimum." AMER GEOPHYSICAL UNION, 2017. http://hdl.handle.net/10150/624342.
Full textYouderian, Bria Danielle. "Influence of the Atlantic Multidecadal and the Pacific Decadal Oscillations on Hemispheric Air Temperature and Cloud Cover." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1250099376.
Full textMaloney, Eric Daniel. "Frictional convergence and the Madden-Julian oscillation /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/10049.
Full textAgard, John Vincent. "A global and tropical quasi-decadal oscillation of the atmosphere and Ocean." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/114373.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 72-75).
An oscillatory, quasi-periodic signal with a period of around 10 years was found in radiosonde- and satellite-measured datasets of lower stratospheric temperature. Power spectrum analysis and Fourier decomposition were used to characterize the temporal and vertical manifestations of the signal, while EOF analyses were used to analyze its spatial characteristics. The oscillation was found to be unrelated to the solar activity cycle, while it displayed coherence with similar oscillatory signals in ENSO, PDO and AMO indices, as well as with a quasi-decadal signal in SST data. Finally, the quasi-decadal signal in lower stratospheric temperature was found to have a small but measurable contribution to the signal of tropical cyclone potential intensity in the Atlantic MDR.
by John Vincent Agard.
S.B.
Donald, Alexis. "The application of the real-time multivariate Madden-Julian Oscillation Index to intraseasonal rainfall forecasting in the mid-latitudes." University of Southern Queensland, Faculty of Sciences, 2004. http://eprints.usq.edu.au/archive/00001423/.
Full textLavender, Sally L. "Modelling the intraseasonal variability of the West African monsoon : influence of the Madden-Julian oscillation and regional soil moisture anomalies." Thesis, University of East Anglia, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504848.
Full textQuilfen, Yves. "Variations interannuelles de l'atmosphere atlantique tropicale et interactions avec l'ocean." Paris 6, 1987. http://www.theses.fr/1987PA066592.
Full text施錦杯 and Kam-pui Sze. "Effects of the interaction of atmosphere and ocean on humanactivities." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31254378.
Full textSemedo, Alvaro A. M. "The North Atlantic oscillation influence on the wave regime in Portugal : an extreme wave event analysis /." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Mar%5FSemedo.pdf.
Full textSze, Kam-pui. "Effects of the interaction of atmosphere and ocean on human activities /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21301414.
Full textLi, Wei 1982. "The variability of North American winter surface temperature and its relation to the sea surface temperature /." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=101604.
Full textMarshall, Samuel David. "Sloping convection : an experimental investigation in a baroclinic annulus with topography." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:ca9cfaf5-49e8-4e30-b93a-65c27d1c8a15.
Full textBoschat, Ghyslaine. "Variabilité interannuelle et prévisibilité du système Mousson Indienne d'Eté - Oscillation Australe El Niño." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00789861.
Full textJacobi, Christoph. "Possible signal of tropospheric circulation patterns in middle atmosphere dynamics, Collm (51.3°N, 13°E) mesosphere lower thermosphere winds: 1979 - 2008." Universität Leipzig, 2009. https://ul.qucosa.de/id/qucosa%3A16368.
Full textZeitreihen von Monatsmittelwerten des Windes in der Mesosphäre/unteren Thermosphäre über Collm werden auf mögliche Korrelationen mit der Nordatlantischen Oszillation (NAO) und der Südlichen Oszillation (SO) hin untersucht. Während eine positive Korrelation bis in die 1990er Jahre existiert, schwächt sich diese in der Folge ab und kehrt sich teilweise um. Da NAO und SO gekoppelt sind, erfolgen diese Änderungen etwa zur selben Zeit. Die Änderung der Kopplung steht wahrscheinlich in Verbindung mit einer generellen Änderung der Dynamik der mittleren Atmosphäre.
Chen, Ying-quei. "Pedictability of ENSO : optimal error growth and forecast skill /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/10023.
Full textMelaragno, Scott Andrew. "The Global Three-Dimensional Structure for the Developmental Phase of ENSO." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1281658857.
Full textSOUSA, Edicarlos Pereira de. "Padrões climáticos de eventos extremos de chuva utilizando análise multivariada e de ondeletas no Estado de Minas Gerais." Universidade Federal de Campina Grande, 2016. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1485.
Full textMade available in DSpace on 2018-08-17T14:30:53Z (GMT). No. of bitstreams: 1 EDICARLOS PEREIRS DE SOUSA - TESE (PPGMet) 2016.pdf: 7117312 bytes, checksum: 96b3ee401a9f1387b098676da0e967eb (MD5) Previous issue date: 2016-05-31
Capes
O estado de Minas Gerais, localizado na região Sudeste do Brasil, possui um território planáltico, com áreas mais elevadas situadas na porção sul. O clima é predominantemente tropical e tropical de altitude, com temperaturas oscilando, normalmente, entre 17 e 20°C. Tais características o tornam, muitas vezes, susceptível a fortes chuvas, provocando transtornos diversos à população. Desse modo, buscou-se analisar a variabilidade da chuva mineira através de técnicas que fossem capazes de definir padrões espaciais e temporais de eventos secos e chuvosos, assim como modulá-los nas escalas tempo-frequência. Para isso, calculou-se o Índice de Precipitação Normalizada (IPN) mensal e trimestral no período 1977-2012. A fim de encontrar padrões espaço-temporais e regiões homogêneas (RH) do IPN mensal e trimestral, utilizaram-se as técnicas da Análise em Componentes Principais (ACP) e Agrupamentos (AA). A técnica da Transformada de Ondeletas (TO) foi aplicada para algumas localidades das diferentes RH em diversas escalas. A TO possibilitou encontrar oscilações importantes no sinal da precipitação, mostrando as componentes dominantes da variabilidade da chuva na área pesquisada. Nos espectros de fase e global de energia da TO, para a chuva mensal, predominou o ciclo anual em todas as localidades. Além da escala anual, observaram-se interações com escalas inferiores a doze meses, possivelmente decorrentes da sazonalidade da precipitação. A TO da precipitação e da Radiação de Onda Longa (ROL) diárias evidenciou frequências maiores que as da chuva mensal. A análise dos espectros de fase e de energia global, nas regiões centro-sul e oeste, apresentou maior energia no início das séries da precipitação e de ROL. Contribuições mais elevadas ocorreram nas escalas sinóticas e intrassazonais, principalmente nas localidades de Viçosa, Bom Despacho, Ituiutaba e Lavras. Esses padrões temporais estão associados com a Oscilação de Madden-Julian (OMJ), intensificando a atuação de sistemas moduladores do clima de Minas Gerais. Oscilações em escalas menores que dez dias foram detectadas nos anos de 2011 e 2012 e podem estar associadas aos sistemas de curto prazo que contribuíram para a chuva mineira. No caso de 2011, os eventos de chuva observados em meados de janeiro foram modulados pelos episódios da Zona de Convergência do Atlântico Sul (ZCAS) e reforçados pela atuação da OMJ.
The state of Minas Gerais, located in southeastern Brazil, has a plateaux area, with higher areas in the southern part. The climate is predominantly tropical and tropical altitude, with temperatures ranging normally between 17 and 20°C. These characteristics make it often susceptible to heavy rains, causing many disorders the population. Thus, it sought to analyze the variability of the rain of Minas Gerais through techniques that were able to define spatial and temporal patterns of dry and wet events, and modulate them in the time-frequency ranges. For this, we calculated the Standardized Precipitation Index (SPI) monthly and quarterly in the period 1977-2012. In order to find spatiotemporal patterns and homogeneous regions (HR) of the monthly and quarterly SPI, we used the techniques of Principal Components Analysis (PCA) and Cluster Analysis (CA). The technique of Wavelets Transform (WT) has been applied to some locations of the different HR at various scales. The WT possible find important variations in rainfall signal, showing the dominant components of rainfall variability in the studied area. In phase spectra and global energy of WT, for the monthly rainfall, dominated the annual cycle in all locations. In addition to the annual scale, there were interactions with scales less than twelve months, possibly due to the seasonality of precipitation. The WT of precipitation and Outgoing Longwave Radiation (OLR) daily reported higher frequencies than the monthly rainfall. Analysis of phase spectra and global power, in south-central and western regions, showed higher energy at the beginning of the series of precipitation and OLR. Higher contributions occurred in the synoptic and intraseasonal scales, especially in the localities of Viçosa, Bom Despacho, Ituiutaba and Lavras. These temporal patterns are associated with the Madden-Julian Oscillation (MJO), intensifying the activity of modulators systems climate of Minas Gerais. Oscillations at smaller scales than ten days were detected in 2011 and 2012 and may be associated with short-term systems that contributed to the Minas Gerais rainfall. In the case of 2011 rain events observed in mid-January they were modulated by episodes of South Atlantic Convergence Zone (SACZ) and reinforced by the performance of MJO.
Illig, Serena. "Variabilité basse fréquence de l'Atlantique Tropical:Rôle de la dynamique océanique équatoriale et Influence d'El Niño Southern Oscillation." Phd thesis, Université Paul Sabatier - Toulouse III, 2005. http://tel.archives-ouvertes.fr/tel-00260664.
Full textGutierrez, Enver Manuel Amador Ramirez. "Interação multi-escala entre o oceano e a atmosfera e a variabilidade de baixa frequência." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/14/14133/tde-27062013-112941/.
Full textIn the present work a multiscale method is used to study resonant nonlinear wave-wave interactions between the ocean and the atmosphere. A hierarchy of coupled atmosphere-ocean models is developed using typical scalings found in the tropical region with the aim to represent some of the dominant modes of climate variability (intraseasonal, interannual and decadal). The sources of nonlinearity included into model are of two types: I) intrinsic nonlinearity (advective form) and II) nonlinearity related to physical terms. A multi-scale perturbation method is applied to obtain equations governing dynamics of ressonant interactions. The solutions are described in terms of dominant and secular solutions. For the dominant modes basis functions of the linear problem are used in a approximation of the Galerkin type. The properties of the basis functions allows the analytical computation of the interaction coefficients associated with non-linear terms and the projection into the natural oscillation modes of the system (resonance). Using this method it is possible to obtain reduced models to determine the contributions of several processes to the slow time evolution of a specific mode of natural variability. To apply these concepts to the problem of atmosphere-ocean coupling an Ansatz composed of a three waves (two atmospheric Rossby and Kelvin waves and an ocean Kelvin wave) is used. The triad chosen represents a aproximation of several phenomena found in the tropical region, e.g. desenvolving of El Nino, interaction of the Madden-Julian oscillation with the ocean, interaction between El Nino and intra-seasonal variability, etc. It is shown that system allows a resonance involving atmospheric and oceanic waves and that the low-frequency modulation resulting from these ressonance can affect the system from fast equatorial synoptic scales to decadal timescales, including the intermediate scales i.e., intraseasonal and interannual.
Vautard, Robert. "Les echelles de temps de la circulation atmospherique : couplage interne et approches de la parametrisation des modes rapides." Paris 6, 1987. http://www.theses.fr/1987PA066657.
Full textChen, Chia-Jeng. "Hydro-climatic forecasting using sea surface temperatures." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/48974.
Full textVialard, Jérôme. "Variabilité océan-atmosphère du secteur Indo-Pacifique." Habilitation à diriger des recherches, Université Pierre et Marie Curie - Paris VI, 2009. http://tel.archives-ouvertes.fr/tel-00755963.
Full textLutringer-Paquet, Audrey. "Reconstruction de la variabilité des eaux intermédiaires par l'étude géochimique des coraux profonds." Phd thesis, Université Paris Sud - Paris XI, 2005. http://tel.archives-ouvertes.fr/tel-00159102.
Full textréponses de l'océan aux changements rapides du climat. Cependant, la variabilité de ces masses d'eau
est encore peu documentée en raison du manque d'enregistrements fiables et pouvant être datés de
manière précise. C'est pour répondre à cette attente que cette étude à été proposée : il s'agissait de
développer l'utilisation des coraux profonds et en particulier de leur signal isotopique pour les
reconstitutions paléo-océanographiques.
Dans un premier temps, une méthode de calcul des températures à partir des données isotopiques (CO)
des coraux a été mise au point. Cette méthode a été testée sur 6 coraux prélevés vivants dans
différents sites où les conditions environnementales étaient connues (T-S). Une fois la méthode
établie, elle a été appliquée, dans un deuxième temps, à une carotte sédimentaire du chenal de Rockall
contenant des coraux. Le signal ainsi obtenu a permis de dégager la forte variabilité isotopique des
coraux sur l'Holocène. Ce signal a été interprété en terme de fluctuations de la contribution des eaux à
composante méditerranéennes par rapport aux eaux du Labrador selon des oscillations climatiques
propres à l'Atlantique Nord. En parallèle de ces études, un grand nombre de datations ont été
effectuées sur des coraux des différentes carottes de la marge irlandaise afin de définir le cadre
stratigraphique représenté par ces coraux. Aucun corail d'âge glaciaire n'a été identifié sur ce site,
dégageant ainsi la sensibilité de ce matériel aux variations paléo- environnementales. Un scénario de
développement et de mise en place des coraux selon les conditions hydrographiques a été proposé
pour expliquer la dynamique de croissance des monts carbonatés sur lesquels se développent les
coraux de l'Atlantique Nord-Est. Par ailleurs, les datations au 14C des foraminifères des carottes
montrent la complexité de l'enregistrement sédimentaire pour ces sites de haute énergie et soulignent
l'intérêt des coraux profonds pour reconstruire la variabilité rapide des eaux intermédiaires.
Kline, Wayne T. "Climatic Factors Associated with the Rapid Wintertime Increase in Cloud Cover across the Great Lakes Region." Kent State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=kent1240256371.
Full textMarini, Camille. "Etude des causes et effets de la circulation méridienne de retournement Atlantique." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2011. http://tel.archives-ouvertes.fr/tel-00994862.
Full textRoehrig, Romain. "Variabilité intrasaisonnière de la mousson africaine : caractérisation et modélisation." Phd thesis, Université Paris-Est, 2010. http://tel.archives-ouvertes.fr/tel-00560954.
Full textFlaounas, Emmanouil. "Analyse de la mise en place de la mousson Africaine : dynamique régionale ou forçage de grande échelle ?" Phd thesis, Paris 6, 2010. http://www.theses.fr/2010PA066625.
Full textIZUMO, Takeshi. "Le sous-courant équatorial et les échanges de masse et de chaleur associés dans le Pacifique tropical : variabilité, liens avec les événements El Niño-La Niña." Phd thesis, Université Paul Sabatier - Toulouse III, 2003. http://tel.archives-ouvertes.fr/tel-00006355.
Full textThual, Sulian. "Modèles réduits pour l'etude des mécanismes et de la modulation de l'oscillation australe El Niño." Phd thesis, Université Paul Sabatier - Toulouse III, 2012. http://tel.archives-ouvertes.fr/tel-00772756.
Full textDas, Surajit. "Intraseasonal Variability in Aquaplanet Configuration of Community Atmosphere Model." Thesis, 2020. https://etd.iisc.ac.in/handle/2005/4625.
Full textJiang, Xianan. "The boreal summer intraseasonal oscillation over the south Asian monsoon region." Thesis, 2004. http://proquest.umi.com/pqdweb?index=0&did=766011941&SrchMode=1&sid=5&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1233101729&clientId=23440.
Full textLin, Xin. "Multiscale variability associated with the intraseasonal oscillation over the western Pacific warm pool." 1997. http://catalog.hathitrust.org/api/volumes/oclc/38743663.html.
Full textSchrage, Jon M. "Modulation of intraseasonal (25-70 day) processes by the superimposed ENSO cycle across the Pacific Basin." 1998. http://catalog.hathitrust.org/api/volumes/oclc/41553848.html.
Full textVenugopal, Thushara. "Sensitivity of Sea Surface Temperature Intraseasonal Oscillation to Diurnal Atmospheric Forcings in an OGCM." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3347.
Full textVenugopal, Thushara. "Sensitivity of Sea Surface Temperature Intraseasonal Oscillation to Diurnal Atmospheric Forcings in an OGCM." Thesis, 2013. http://etd.iisc.ernet.in/2005/3347.
Full text