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	Provedor de dados ArchiMer (3) Autor Abbott, Peter M. (3) Bourne, Anna J. (2) Davies, Siwan M. (2) Griggs, Adam J. (2) Berben, Sarah M.p. (1) Chapman, Mark R. (1) Cook, Eliza (1) Dokken, Trond M. (1) Jansen, Eystein (1) Sadatzki, Henrik (1) Simon, Margit H (1) Mais... Palavra-chave Marine cores (3) North Atlantic (3) Quaternary (3) Palaeoceanography (2) Tephrochronology (2) Cryptotephrochronology (1) DO-Events (1) Glass shard concentrations (1) Ice cores (1) Paleoceanography (1) Paleoclimatology (1) Sedimentology (1) Synchronization (1) Tephra framework (1) Transport and deposition (1) Mais... Tipo do documento Text (3) Ano 2020 (1) 2018 (2) País France (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Independent tephrochronological evidence for rapid and synchronous oceanic and atmospheric temperature rises over the Greenland stadial-interstadial transitions between ca. 32 and 40 ka b2k ArchiMer Berben, Sarah M.p.; Dokken, Trond M.; Abbott, Peter M.; Cook, Eliza; Sadatzki, Henrik; Simon, Margit H; Jansen, Eystein. Understanding the dynamics that drove past abrupt climate changes, such as the Dansgaard-Oeschger (DO) events, depends on combined proxy evidence from disparate archives. To identify leads, lags and synchronicity between different climate system components, independent and robust chronologies are required. Cryptotephrochronology is a key geochronological tool as cryptotephra horizons can act as isochrons linking disparate and/or distant records. Here, we investigated marine sediment core MD99-2284 from the Norwegian Sea to look for previously identified Greenland ice core cryptotephra horizons and define time-parallel markers between the archives. We explored potential secondary transport and depositional mechanisms that could hamper the isochronous... Tipo: Text Palavras-chave: Quaternary; Paleoclimatology; Paleoceanography; North Atlantic; Sedimentology; Marine cores; Ice cores; Cryptotephrochronology; DO-Events; Synchronization. Ano: 2020 URL: https://archimer.ifremer.fr/doc/00622/73391/72606.pdf Tracing marine cryptotephras in the North Atlantic during the last glacial period: Protocols for identification, characterisation and evaluating depositional controls ArchiMer Abbott, Peter M.; Griggs, Adam J.; Bourne, Anna J.; Davies, Siwan M.. Tephrochronology is increasingly being utilised as a key tool for improving chronological models and correlating disparate palaeoclimatic sequences. For many sedimentary environments, however, there is an increased recognition that a range of processes may impart a delay in deposition and/or rework tephra. These processes can affect the integrity of tephra deposits as time-synchronous markers, therefore, it is crucial to assess their isochronous nature, especially when cryptotephras are investigated in a dynamic marine environment. A methodology for the identification and characterisation of marine cryptotephras alongside a protocol for assessing their integrity is outlined. This methodology was applied to a wide network of North Atlantic marine sequences... Tipo: Text Palavras-chave: Quaternary; Palaeoceanography; Tephrochronology; North Atlantic; Transport and deposition; Marine cores; Glass shard concentrations. Ano: 2018 URL: https://archimer.ifremer.fr/doc/00495/60700/83609.pdf Tracing marine cryptotephras in the North Atlantic during the last glacial period: Improving the North Atlantic marine tephrostratigraphic framework ArchiMer Abbott, Peter M.; Griggs, Adam J.; Bourne, Anna J.; Chapman, Mark R.; Davies, Siwan M.. Tephrochronology is increasingly being recognised as a key tool for the correlation of disparate palae-oclimatic archives, underpinning chronological models and facilitating climatically independent comparisons of climate proxies. Tephra frameworks integrating both distal and proximal tephra occurrences are essential to these investigations providing key details on their spatial distributions, geochemical signatures, eruptive sources as well as any available chronological and/or stratigraphic information. Frameworks also help to avoid mis-correlation of horizons and provide important information on volcanic history. Here we present a comprehensive chronostratigraphic framework of 14 tephra horizons from North Atlantic marine sequences spanning 60-25 cal ka... Tipo: Text Palavras-chave: Quaternary; Palaeoceanography; Tephrochronology; North Atlantic; Tephra framework; Marine cores. Ano: 2018 URL: https://archimer.ifremer.fr/doc/00495/60702/83611.pdf Registros recuperados: 3 Primeira ... 1 ... Última

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