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Authordc.contributor.authorCarre, Matthieu 
Authordc.contributor.authorJackson Squella, Donald 
Authordc.contributor.authorMaldonado, Antonio 
Authordc.contributor.authorChase, Brian 
Authordc.contributor.authorSachs, Julian 
Cita de ítemdc.identifier.citationQuaternary Research 85 (2016) 87–93en_US
Identifierdc.identifier.otherDOI: 10.1016/j.yqres.2015.12.002
General notedc.descriptionArtículo de publicación ISIen_US
Abstractdc.description.abstractThe variability of radiocarbon marine reservoir age through time and space limits the accuracy of chronologies in marine paleo-environmental archives. We report here new radiocarbon reservoir ages (Delta R) from the central coast of Chile (similar to 32 degrees S) for the Holocene period and compare these values to existing reservoir age reconstructions from southern Peru and northern Chile. Late Holocene Delta R values show little variability from central Chile to Peru. Prior to 6000 cal yr BP, however, Delta R values were markedly increased in southern Peru and northern Chile, while similar or slightly lower-than-modern Delta R values were observed in central Chile. This extended dataset suggests that the early Holocene was characterized by a substantial increase in the latitudinal gradient of marine reservoir age between central and northern Chile. This change in the marine reservoir ages indicates that the early Holocene air-sea flux of CO2 could have been up to five times more intense than in the late Holocene in the Peruvian upwelling, while slightly reduced in central Chile. Our results show that oceanic circulation changes in the Humboldt system during the Holocene have substantially modified the air-sea carbon flux in this region.en_US
Patrocinadordc.description.sponsorshipNational Geographic Society 8122-06; U.S. National Science Foundation NSF-ATM-0811382 Chilean; FONDECYT 1140824en_US
Type of licensedc.rightsAtribución-NoComercial-SinDerivadas 3.0 Chile*
Link to Licensedc.rights.uri*
Keywordsdc.subjectHumboldt systemen_US
Keywordsdc.subjectReservoir ageen_US
Keywordsdc.subjectShell middensen_US
Títulodc.titleVariability of C-14 reservoir age and air-sea flux of CO2 in the Peru-Chile upwelling region during the past 12,000 yearsen_US
Document typedc.typeArtículo de revistaen_US

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Atribución-NoComercial-SinDerivadas 3.0 Chile
Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 Chile