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dc.contributor.author
Sarnthein, Michael  
dc.contributor.author
Küssner, Kevin  
dc.contributor.author
Grootes, Pieter M.  
dc.contributor.author
Ausin, Blanca  
dc.contributor.author
Eglinton, Timothy  
dc.contributor.author
Muglia, Juan  
dc.contributor.author
Muscheler, Raimund  
dc.contributor.author
Schlolaut, Gordon  
dc.date.available
2021-08-10T19:48:25Z  
dc.date.issued
2020-12  
dc.identifier.citation
Sarnthein, Michael; Küssner, Kevin; Grootes, Pieter M.; Ausin, Blanca; Eglinton, Timothy; et al.; Plateaus and jumps in the atmospheric radiocarbon record: Potential origin and value as global age markers for glacial-to-deglacial paleoceanography, a synthesis; Copernicus Publications; Climate of the Past; 16; 6; 12-2020; 2547-2571  
dc.identifier.issn
1814-9332  
dc.identifier.uri
http://hdl.handle.net/11336/138127  
dc.description.abstract
Changes in the geometry of ocean meridional overturning circulation (MOC) are crucial in controlling past changes of climate and the carbon inventory of the atmosphere. However, the accurate timing and global correlation of short-term glacial-to-deglacial changes of MOC in different ocean basins still present a major challenge. The fine structure of jumps and plateaus in atmospheric and planktic radiocarbon (14C) concentration reflects changes in atmospheric 14C production, ocean-atmosphere 14C exchange, and ocean mixing. Plateau boundaries in the atmospheric 14C record of Lake Suigetsu, now tied to Hulu Cave U/Th model ages instead of optical varve counts, provide a stratigraphic "rung ladder" of up to 30 age tie points from 29 to 10 cal ka for accurate dating of planktic oceanic 14C records. The age differences between contemporary planktic and atmospheric 14C plateaus record the global distribution of 14C reservoir ages for surface waters of the Last Glacial Maximum (LGM) and deglacial Heinrich Stadial 1 (HS-1), as documented in 19 and 20 planktic 14C records, respectively. Elevated and variable reservoir ages mark both upwelling regions and high-latitude sites covered by sea ice and/or meltwater. 14C ventilation ages of LGM deep waters reveal opposed geometries of Atlantic and Pacific MOC. Like today, Atlantic deep-water formation went along with an estuarine inflow of old abyssal waters from the Southern Ocean up to the northern North Pacific and an outflow of upper deep waters. During early HS-1, 14C ventilation ages suggest a reversed MOC and ĝ1/41500-year flushing of the deep North Pacific up to the South China Sea, when estuarine circulation geometry marked the North Atlantic, gradually starting near 19 ka. High 14C ventilation ages of LGM deep waters reflect a major drawdown of carbon from the atmosphere. The subsequent major deglacial age drop reflects changes in MOC accompanied by massive carbon releases to the atmosphere as recorded in Antarctic ice cores. These new features of MOC and the carbon cycle provide detailed evidence in space and time to test and refine ocean models that, in part because of insufficient spatial model resolution and reference data, still poorly reproduce our data sets.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Copernicus Publications  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/  
dc.subject
ATMOSPHERIC RADIOCARBON  
dc.subject
PALEOCEANOGRAPHY  
dc.subject.classification
Geoquímica y Geofísica  
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Ciencias de la Tierra y relacionadas con el Medio Ambiente  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Plateaus and jumps in the atmospheric radiocarbon record: Potential origin and value as global age markers for glacial-to-deglacial paleoceanography, a synthesis  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2021-03-12T19:14:50Z  
dc.journal.volume
16  
dc.journal.number
6  
dc.journal.pagination
2547-2571  
dc.journal.pais
Alemania  
dc.journal.ciudad
Gotinga  
dc.description.fil
Fil: Sarnthein, Michael. Christian Albrechts Universitat Zu Kiel; Alemania  
dc.description.fil
Fil: Küssner, Kevin. Alfred-Wegener-Institut. Helmholtz-Zentrum für Polar und Meeresforschung; Alemania  
dc.description.fil
Fil: Grootes, Pieter M.. Christian Albrechts Universitat Zu Kiel; Alemania  
dc.description.fil
Fil: Ausin, Blanca. Universidad de Salamanca; España. ETH Zürich. Geological Institute; Suiza. Escuela Politécnica Nacional; Ecuador  
dc.description.fil
Fil: Eglinton, Timothy. ETH Zürich. Geological Institute; Suiza  
dc.description.fil
Fil: Muglia, Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Centro para el Estudio de Sistemas Marinos; Argentina  
dc.description.fil
Fil: Muscheler, Raimund. Lund University; Suecia  
dc.description.fil
Fil: Schlolaut, Gordon. German Research Centre for Geosciences; Alemania  
dc.journal.title
Climate of the Past  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.5194/cp-16-2547-2020  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://cp.copernicus.org/articles/16/2547/2020/