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	Provedor de dados ArchiMer (2) Autor Adkins, Jess F. (2) Burke, Andrea (1) Ferrari, Raffaele (1) Hines, Sophia K. V. (1) Jansen, Malte F. (1) Southon, John R. (1) Stewart, Andrew L. (1) Thompson, Andrew F. (1) Mais... Palavra-chave Radiocarbon (2) Glacial interglacial climate change (1) Intermediate water (1) Last Glacial Maximum (1) Meridional overturning circulation (1) Overturning circulation (1) Southern Ocean (1) Southern Ocean fronts (1) Mais... Tipo do documento Text (2) Ano 2015 (2) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última A high-resolution record of Southern Ocean intermediate water radiocarbon over the past 30,000 years ArchiMer Hines, Sophia K. V.; Southon, John R.; Adkins, Jess F.. The circulation of intermediate waters plays an important role in global heat and carbon transport in the ocean and changes in their distribution are closely tied to glacial-interglacial climate change. Coupled radiocarbon and U/Th measurements on deep-sea Desmophyllum dianthus corals allow for the reconstruction of past intermediate water ventilation. We present a high-resolution time series of Antarctic Intermediate Water radiocarbon from 44 corals spanning 30 ka through the start of the Holocene, encompassing the transition into the Last Glacial Maximum (LGM) and the last deglaciation. Corals were collected south of Tasmania from water depths between 1430 and 1950 m with 80% of them between 1500 and 1700 m, giving us a continuous record from a narrow... Tipo: Text Palavras-chave: Southern Ocean; Radiocarbon; Glacial interglacial climate change; Meridional overturning circulation; Southern Ocean fronts; Intermediate water. Ano: 2015 URL: https://archimer.ifremer.fr/doc/00497/60838/64466.pdf The glacial mid-depth radiocarbon bulge and its implications for the overturning circulation ArchiMer Burke, Andrea; Stewart, Andrew L.; Adkins, Jess F.; Ferrari, Raffaele; Jansen, Malte F.; Thompson, Andrew F.. Published reconstructions of radiocarbon in the Atlantic sector of the Southern Ocean indicate that there is amid-depth maximum in radiocarbon age during the Last Glacial Maximum (LGM). This is in contrast to the modern ocean where intense mixing between water masses results in a relatively homogenous radiocarbon profile. Ferrari et al. (2014) suggested that the extended Antarctic sea ice cover during the LGM necessitated a shallower boundary between the upper and lower branches of the meridional overturning circulation. This shoaled boundary lay above major topographic features associated with strong diapycnal mixing, isolating dense southern sourced water in the lower branch of the overturning circulation. This isolation would have allowed radiocarbon to... Tipo: Text Palavras-chave: Radiocarbon; Overturning circulation; Last Glacial Maximum. Ano: 2015 URL: https://archimer.ifremer.fr/doc/00497/60855/64245.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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