Results 121 to 130 of about 158,813 (385)

Radiocarbon constraints on the glacial ocean circulation and its impact on atmospheric CO2

Nature Communications, 2017
While the ocean’s large-scale overturning circulation is thought to have been significantly different under the climatic conditions of the Last Glacial Maximum (LGM), the exact nature of the glacial circulation and its implications for global carbon ...
L. Skinner, F. Primeau, E. Freeman, M. D. L. Fuente, P. Goodwin, J. Gottschalk, J. Gottschalk, Enqing Huang, Enqing Huang, I. N. McCave, T. Noble, A. Scrivner   +11 more
semanticscholar   +1 more source

125 years of exploration and research at Gough's Cave (Somerset, UK) 125 ans d'exploration et de recherches à Gough's Cave (Somerset, Royaume‐Uni)

Journal of the Royal Anthropological Institute, EarlyView.
Our understanding of the recolonization of northwest Europe in the period leading up to the Lateglacial Interstadial relies heavily on discoveries from Gough's Cave (Somerset, UK). Gough's Cave is the richest Late Upper Palaeolithic site in the British Isles, yielding an exceptional array of human remains, stone and organic artefacts, and butchered ...
Silvia M. Bello, Mark D. Lewis, Simon A. Parfitt   +2 more
wiley   +1 more source

Radiocarbon analysis of methane emitted from the surface of a raised peat bog [PDF]

, 2012
We developed a method to determine the radiocarbon (14C) concentration of methane (CH4) emitted from the surface of peatlands. The method involves the collection of ~ 9 L of air from a static gas sampling chamber which is returned to the laboratory in a ...
Aravena, C. Murray, Chanton, Chanton, Chanton, Charman, Clymo, Clymo, Forbrich, Garnett, Greenup, Hardie, IPCC, Laing, Langdon, Lassey, Lassey, Levin, Levin, Lowe, Lowry, M.H. Garnett, Marinier, Mastepanov, Quay, S.M.L. Hardie, Schuur, Slota, Strack, Stuiver, Wahlen   +30 more
core   +1 more source

EVALUATION OF AQUEOUS GASTROPOD SHELLS AS GROUNDWATER RADIOCARBON PROXIES ACROSS SPECIES AND SITES [PDF]

, 2023
Jory Lerback, S Bagge, Brenda B. Bowen
openalex   +1 more source

Earliest Human Presence in North America Dated to the Last Glacial Maximum: New Radiocarbon Dates from Bluefish Caves, Canada

PLoS ONE, 2017
The timing of the first entry of humans into North America is still hotly debated within the scientific community. Excavations conducted at Bluefish Caves (Yukon Territory) from 1977 to 1987 yielded a series of radiocarbon dates that led archaeologists ...
Lauriane Bourgeon, A. Burke, T. Higham
semanticscholar   +1 more source

And then there was us Et puis nous sommes apparus

Journal of the Royal Anthropological Institute, EarlyView.
In 1987, the academic conference ‘Origins and Dispersals of Modern Humans: Behavioural and Biological Perspectives’ was held in Cambridge, UK. Subsequently referred to as the ‘Human Revolution’ conference, this meeting brought together the most prominent academics working in the field of human origins, including archaeologists and palaeoanthropologists,
Emma E. Bird, Julia Galway‐Witham, Chris Stringer   +2 more
wiley   +1 more source

A new model of cosmogenic production of radiocarbon 14C in the atmosphere

, 2012
We present the results of full new calculation of radiocarbon 14C production in the Earth atmosphere, using a numerical Monte-Carlo model. We provide, for the first time, a tabulated 14C yield function for the energy of primary cosmic ray particles ...
Adriani, Alanko-Huotari, Alcaraz, Alcaraz, Alexander Mishev, Bard, Beer, Beer, Bolin, Burger, Castagnoli, Clem, Damon, Desorgher, Dorman, Dorman, Elsasser, Garcia-Munoz, Gennady A. Kovaltsov, Goslar, Hedin, Herbst, Hudson, Ilya G. Usoskin, Korff, Korte, Kovaltsov, Kromer, Lal, Lal, LaViolette, Light, Lingenfelter, Lingenfelter, Lockwood, Masarik, Masarik, Masarik, McCracken, Muscheler, Nakamura, O'Brien, O'Brien, O'Brien, O'Brien, Picone, Reimer, Simpson, Snowball, Solanki, Steinhilber, Stuiver, Stuiver, Usoskin, Usoskin, Usoskin, Usoskin, Usoskin, Usoskin, Webber, Webber, Webber   +61 more
core   +1 more source

Improving the 14c dating of marine shells from the Canary Islands for constructing more reliable and accurate chronologies [PDF]

, 2012
Radiocarbon dating of closely associated marine mollusk shells and terrestrial material (charred wood or bone) collected from archaeological contexts on Tenerife and Fuerteventura islands allowed us to quantify the marine C-14 reservoir effect (Delta R ...
Acosta, Arco Aguilar, Arco Aguilar, Arco Aguilar, Jiménez Sánchez, Longin, Machado Yanes, Martín Rodriguez, Martín Socas, Martín Socas, Reimer, Soares, Soares, Wooster, Álvarez Delgado   +14 more
core   +1 more source

Bridging the Late Antique Gap in Northwest Arabia: New Archaeological Evidence on the Occupation of Wādī al‐Qurā (al‐ʿUlā [AlUla], Saudi Arabia) Between the Third and Seventh Centuries CE

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT In 2019, the Dadan Archaeological Project (CNRS/RCU/AFALULA) identified a Late Antique village 1 km south of ancient Dadan in the al‐ʿUlā valley (northwest Saudi Arabia). Three excavation seasons at this site (2021–2023) have uncovered a massive building constructed in the late third or early fourth cent.
Jérôme Rohmer, Abdulrahman Alsuhaibani, Charlène Bouchaud, Elora Chambraud, Vladimir Dabrowski, Hatem Djerbi, Fabien Lesguer, Hervé Monchot, Paul Picavet, Louise Purdue, Bertrand Riba, Shadi Shabo   +11 more
wiley   +1 more source

Laser Spectroscopy for Monitoring of Radiocarbon in Atmospheric Samples

Analytical Chemistry, 2019
In-situ monitoring of radiocarbon emissions is challenging due to the lack of a suitable method for sensitive online detection of this isotope. Here we report on a complete system for automatized continuous on-site monitoring of radiocarbon gaseous ...
G. Genoud, J. Lehmuskoski, S. Bell, V. Palonen, M. Oinonen, Mari-Leena Koskinen-Soivi, M. Reinikainen   +6 more
semanticscholar   +1 more source