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	Provedor de dados ArchiMer (1) Autor Bard, Edouard (1) Heaton, Timothy J (1) Tipo do documento Text (1) Ano 2021 (1) País France (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última On the tuning of plateaus in atmospheric and oceanic 14C records to derive calendar chronologies of deep-sea cores and records of 14C marine reservoir age changes ArchiMer Bard, Edouard; Heaton, Timothy J. As an extended comment on the paper by Sarnthein et al. (2020), we express strong reservations about the methodology of the so-called 14C plateau tuning (PT) technique used to date marine sediment records and its implications on the determination of 14C marine reservoir ages (MRA). The main problems are linked to: the assumption of constant MRA during 14C-age plateaus; the lack of consideration of foraminifera abundance changes coupled to bioturbation that can create spurious plateaus in marine sediments; the assumption that plateaus have the same shapes and durations in atmospheric and oceanic records; the implication that atmospheric 14C/12C peaked instantaneously from one plateau to the next; that the 14C plateaus represent 82 % of the total time spent... Tipo: Text Ano: 2021 URL: https://archimer.ifremer.fr/doc/00667/77949/80129.pdf Registros recuperados: 1 Primeira ... 1 ... Última

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