Results 21 to 30 of about 5,162 (168)
Radiocarbono y Calibración: Potencialidades para la arqueología andina
Arqueología y Sociedad, 2006 Este artículo se basa en gran parte en el manual maestro de Taylor (1987) sobre radiocarbono, aun vigente a pesar del tiempo. No pretende, por tanto, ser exhaustivo en bibliografía, sino simplemente citar algunos textos básicos a modo de referencia.
Elmo León Canales
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Modelización bayesiana de radiocarbono para principiantes [PDF]
, 2020 Caitlin E. Buck, Miguel A. Juárez
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SPAL. Revista de Prehistoria y Arqueología de la Universidad de Sevilla, 2019 El descubrimiento e implementación, a partir de mediados del siglo XX, de la datación radiocarbónica constituyó un hito trascendental para la investigación arqueológica. Su desarrollo técnico a lo largo de las últimas décadas ha ampliado, hasta extremos no hace mucho difíciles de imaginar, las posibilidades de abordar problemas cronológicos de carácter
Mauro S. Hernández Pérez +2 more
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Uma datação pelo radiocarbono para a Mamoa 5 de Outeiro de Gregos (Baião)
, 1989 Vítor Oliveira Jorge
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Increased atmospheric CO2 and the transit time of carbon in terrestrial ecosystems
Global Change Biology, Volume 29, Issue 23, Page 6441-6452, December 2023., 2023 Terrestrial ecosystems remove CO2 from the atmosphere via photosynthesis and convert it into biomass and soil organic matter. This carbon is returned to the atmosphere via decomposition and respiration, processes that depend on climatic conditions, microbial community structure and function, and nutrient availability.
Estefanía Muñoz +2 more
wiley +1 more source
Quantitative analysis of diurnal CO2 flux variations above an alkaline playa
Vadose Zone Journal, Volume 22, Issue 6, November/December 2023., 2023 Abstract The alkaline playas at Atlin, BC, provide a unique opportunity for studying the carbonate–bicarbonate system and carbonate mineral stability at the Earth's surface. In this study, dynamic closed chambers (DCCs) and pore‐gas sampling were used to directly quantify carbon dioxide (CO2) emission rates and characterize processes governing the CO2 ...
Anne‐Martine Doucet +6 more
wiley +1 more source
Archaeology in Oceania, Volume 58, Issue 2, Page 172-182, July 2023., 2023 ABSTRACT The Wellington Range region, in far Northern Australia, provides a remarkable record of cultural encounter. Cathedral‐sized rock art galleries include contact imagery referencing Macassan and European visitors while lithic artefact assemblages echo social mobility between Indigenous groups occurring from at least the mid Holocene period.
Duncan Wright +6 more
wiley +1 more source
Vadose Zone Journal, Volume 21, Issue 5, September/October 2022., 2022 Abstract Agricultural soils contribute significantly to global CO2 emissions. Soils can be both a CO2 sink and source depending on vegetation cover and the physical‐chemical characteristics of the soil environment. This study uses a new 14C dating approach to elucidate soil physical and geochemical properties that drive the production and transport of ...
Oliver Blume +10 more
wiley +1 more source
Derbyana, 2021 O uso de isótopos em estudos hidrogeológicos constitui uma importante ferramenta na construção de modelos conceituais de funcionamento, bem como na determinação de parâmetros relacionados à recarga e ao fluxo das águas subterrâneas.
Gerson Cardoso da Silva Jr. +3 more
doaj +1 more source
Archaeology in Oceania, Volume 57, Issue 2, Page 146-149, July 2022., 2022 Abstract Here, we report on the results of microCT scanning and Accelerator Mass Spectrometry (AMS) radiocarbon dating of fragments of charred archaeological parenchyma collected from surface deposits at Nombe rockshelter in the highlands of Papua New Guinea. Five fragments are taxonomically identified as sweet potato (Ipomoea batatas).
ALEESE BARRON +2 more
wiley +1 more source