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	Provedor de dados ArchiMer (2) Autor Barker, Stephen (2) Hall, Ian R. (2) Thornalley, David J. R. (2) Anderson, Robert F. (1) Griffiths, James D. (1) Hendry, Katharine R. (1) Moffa-sanchez, Paola (1) Van De Flierdt, Tina (1) Yashayaev, Igor (1) Mais... Palavra-chave &#x03B4 (1) 18O (1) AAIW (1) Ca (1) Carbon dioxide (1) Diatom (1) Last millennium (1) Mg (1) Planktonic foraminifera (1) SAMW (1) Silica leakage (1) Surface Labrador Sea (1) Mais... Tipo do documento Text (2) Ano 2014 (1) 2013 (1) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Surface changes in the eastern Labrador Sea around the onset of the Little Ice Age ArchiMer Moffa-sanchez, Paola; Hall, Ian R.; Barker, Stephen; Thornalley, David J. R.; Yashayaev, Igor. Despite the relative climate stability of the present interglacial, it has been punctuated by several centennial-scale climatic oscillations; the latest of which are often colloquially referred to as the Medieval Climatic Anomaly (MCA) and the Little Ice Age (LIA). The most favored explanation for the cause of these anomalies is that they were triggered by variability in solar irradiance and/or volcanic activity and amplified by ocean-atmosphere-sea ice feedbacks. As such, changes in the strength of the Atlantic Meridional Overturning Circulation (AMOC) are widely believed to have been involved in the amplification of such climatic oscillations. The Labrador Sea is a key area of deep water formation. The waters produced here contribute approximately one... Tipo: Text Palavras-chave: Planktonic foraminifera; δ 18O; Mg; Ca; Surface Labrador Sea; Last millennium. Ano: 2014 URL: https://archimer.ifremer.fr/doc/00290/40167/39108.pdf Evidence of silicic acid leakage to the tropical Atlantic via Antarctic Intermediate Water during Marine Isotope Stage 4 ArchiMer Griffiths, James D.; Barker, Stephen; Hendry, Katharine R.; Thornalley, David J. R.; Van De Flierdt, Tina; Hall, Ian R.; Anderson, Robert F.. Antarctic Intermediate Water (AAIW) and Subantarctic Mode Water (SAMW) are the main conduits for the supply of dissolved silicon (silicic acid) from the deep Southern Ocean (SO) to the low-latitude surface ocean and therefore have an important control on low-latitude diatom productivity. Enhanced supply of silicic acid by AAIW (and SAMW) during glacial periods may have enabled tropical diatoms to outcompete carbonate-producing phytoplankton, decreasing the relative export of inorganic to organic carbon to the deep ocean and lowering atmospheric pCO(2). This mechanism is known as the silicic acid leakage hypothesis (SALH). Here we present records of neodymium and silicon isotopes from the western tropical Atlantic that provide the first direct evidence of... Tipo: Text Palavras-chave: Silica leakage; Diatom; Carbon dioxide; SAMW; AAIW. Ano: 2013 URL: https://archimer.ifremer.fr/doc/00264/37526/35763.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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