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	Provedor de dados ArchiMer (2) Autor Beaufort, Luc (1) Grelaud, Michael (1) Shakun, Jeremy D (1) Palavra-chave Pacific Decadal Oscillation (2) Centennial climatic variability (1) Deglaciation (1) El Nino Southern Oscillation (1) El Nino-Southern Oscillation (1) Greenhouse gases (1) Milankovitch (1) Ocean circulation (1) Paleoclimate (1) Past climate variability (1) Santa Barbara Basin (1) Solar cycles (1) Mais... Tipo do documento Text (2) Ano 2017 (1) 2010 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Analyzing Large Paleoclimate Datasets: Implications for Past and Future Climate Change. ArchiMer Shakun, Jeremy D. This dissertation presents the results of statistical analyses of large climate datasets from two time intervals – the 20th century instrumental record and the proxy record of the last deglaciation – in order to understand the forcings and mechanisms of past climate variability. A longstanding question in climate dynamics concerns the origin of Pacific decadal variability (PDV). This issue is addressed by calculating the Southern Hemisphere equivalent of the Pacific Decadal Oscillation (PDO) index from Pacific sea surface temperature (SST) anomalies over the 20th century, which is found to be similar to its Northern Hemisphere counterpart. The Northern and Southern PDO indices both exhibit pronounced seasonality in autocorrelation with interannual... Tipo: Text Palavras-chave: El Nino-Southern Oscillation; Pacific Decadal Oscillation; Paleoclimate; Deglaciation; Ocean circulation; Milankovitch; Greenhouse gases. Ano: 2010 URL: https://archimer.ifremer.fr/doc/00495/60654/64151.pdf A 2700-year record of ENSO and PDO variability from the Californian margin based on coccolithophore assemblages and calcification ArchiMer Beaufort, Luc; Grelaud, Michael. The El Niño Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO) account for a large part of modern climate variability. Over the last decades, understanding of these modes of climate variability has increased but prediction in the context of global warming has proven difficult because of the lack of pertinent and reproducible paleodata. Here, we infer the dynamics of these oscillations from fossil assemblage and calcification state of coccolithophore in the Californian margin because El Niño has a strong impact on phytoplankton ecology and PDO on the upwelling intensity and hence on the ocean chemistry. Intense Californian upwelling brings water rich in CO2 and poor in carbonate ions and coccolithophores secrete lower calcified... Tipo: Text Palavras-chave: El Nino Southern Oscillation; Pacific Decadal Oscillation; Past climate variability; Santa Barbara Basin; Solar cycles; Centennial climatic variability. Ano: 2017 URL: https://archimer.ifremer.fr/doc/00377/48848/49280.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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