English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/177615
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Dating the Anthropocene in deep-sea sediments: how much carbon is buried in the Irminger Basin?

AuthorsFontela, Marcos; Francés, G. ; Quintana, Begoña ; Álvarez-Fernández, María Jesús ; Nombela, Miguel Ángel; Alejo, I.; Pedrosa, M. C.; Pérez, Fiz F.
KeywordsDeep-sea sedimentation rate
Subpolar North Atlantic
Irminger Basin
Carbon sink
Issue DateApr-2019
CitationGlobal and Planetary Change 175: 92-102 (2019)
AbstractEvaluation of biogeochemical processes in Anthropocene deep-sea sediments require accurate dating techniques. Here we show the results of an approach using high resolution low level background gamma spectrometry with two simultaneous hyper-pure germanium (HPGe) detectors. The quantitative role of the deepest zones (>3000 m depth) of the Irminger Basin (Subpolar North Atlantic Ocean) as a carbon sink during the Anthropocene is evaluated combining a chronology based in the natural radionuclide 210Pb with sedimentological analysis and elemental composition. The average sedimentation rate of the central Irminger is 1.28 ± 0.18 mm·yr−1, with a mean weighted flux to the sediment for inorganic and organic carbon of 46 ± 15 g·Cinorg·m−2·yr−1 and 8 ± 1 g·Corg·m−2·yr−1. The biogenic fraction of the mass flux is increased since the XXth century. The contribution of the deepest zones of the Irminger Basin to the Anthropocene carbon sequestration in the North Atlantic Ocean is considerable at basin-scale.
Description31 pages, 5 figures.
Publisher version (URL)https://doi.org/10.1016/j.gloplacha.2019.02.008
Appears in Collections:(IIM) Artículos
Files in This Item:
File Description SizeFormat 
Dating_Anthropocene_2019.pdf1,15 MBAdobe PDFThumbnail
Show full item record
Review this work

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.