Results 11 to 20 of about 10,153 (261)

Limitations of the radon tracer method (RTM) to estimate regional greenhouse gas (GHG) emissions – a case study for methane in Heidelberg [PDF]

Atmospheric Chemistry and Physics, 2021
Correlations of nighttime atmospheric methane (CH4) and 222radon (222Rn) observations in Heidelberg, Germany, were evaluated with the radon tracer method (RTM) to estimate the trend of annual nocturnal CH4 emissions from 1996–2020 in the footprint of ...
I. Levin, U. Karstens, S. Hammer, S. Hammer, J. DellaColetta, J. DellaColetta, F. Maier, F. Maier, M. Gachkivskyi, M. Gachkivskyi   +9 more
doaj   +1 more source

DENDROCHRONOLOGY AND RADIOCARBON DATING [PDF]

Radiocarbon, 2021
ABSTRACTBoth dendrochronology and radiocarbon (14C) dating have their roots back in the early to mid-1900s. Although they were independently developed, they began to intertwine in the 1950s when the founder of dendrochronology, A. E. Douglass, provided dated wood samples for Willard Libby to test his emerging 14C methods.
Charlotte L Pearson, Steven W Leavitt, Bernd Kromer, Sami K Solanki, Ilya Usoskin   +4 more
openaire   +4 more sources

Background Tests and Improvements at LAC-UFF Aiming at Sample Size Reduction in Foraminifera ¹⁴C Measurement

Geographies, 2023
Foraminifera are widely used in paleoclimatic and paleoceanographic studies, providing information about past ocean conditions. However, in order to use these tracers, it is essential to obtain an accurate chronology.
Bruna M. Netto, Kita D. Macario, Ayrton Assumpção, Maikel Diaz, Stewart J. Fallon, Xiaomei Xu, Ingrid Chanca, Carla Carvalho   +7 more
doaj   +1 more source

Sub-annual bomb radiocarbon records from trees in northern Israel

Scientific Reports, 2023
Spatial and temporal variations in the atmospheric bomb radiocarbon make it a very useful tracer and a dating tool. With the introduction of more atmospheric bomb radiocarbon records, the spatial and temporal changes in bomb radiocarbon are becoming ...
Harsh Raj, Yael Ehrlich, Lior Regev, Eugenia Mintz, Elisabetta Boaretto   +4 more
doaj   +1 more source

Discovery of annual growth in a modern olive branch based on carbon isotopes and implications for the Bronze Age volcanic eruption of Santorini

Scientific Reports, 2021
The volcanic eruption of Santorini in the Bronze Age left detectable debris across the Mediterranean, serving as an anchor in time for the region, synchronizing chronologies of different sites.
Yael Ehrlich, Lior Regev, Elisabetta Boaretto   +2 more
doaj   +1 more source

Chemical Analysis Suggesting Origin of Raw Materials and Possible Recycling of Late Antique Roman Glass from Vasileos Irakleiou Street 45, Thessaloniki in Northern Greece

Applied Sciences, 2022
During antiquity, it is known that glass was produced in specialized primary workshops in Levant and Egypt, and this glass was melted and formed into objects in secondary workshops, and distributed in most cities and towns of the Roman Empire.
Petros Karalis, Elissavet Dotsika, Athanasios Godelitsas, Anastasios Antonaras, Anastasia Elektra Poutouki, Maria Tassi   +5 more
doaj   +1 more source

Хylotomical study of Early Mediaeval wooden artifacts from Crimea (based on materials from the necropolis of Chufut-Kale) [PDF]

Материалы по археологии и истории античного и средневекового Причерноморья, 2022
Since 1957 until 1961, a rich sample of archaeological wood was accumulated during V.V. Kropotkin’s excavations near Bakhchysarai, at the burial ground of Chufut-Kale dated back to the late 5th — 9th centuries.
Strokov, A.A., Kupriyanov, D.A., Kamelina, G.A.   +2 more
doaj   +1 more source

Sixty years of radiocarbon dioxide measurements at Wellington, New Zealand: 1954–2014 [PDF]

Atmospheric Chemistry and Physics, 2017
We present 60 years of Δ14CO2 measurements from Wellington, New Zealand (41° S, 175° E). The record has been extended and fully revised. New measurements have been used to evaluate the existing record and to replace original measurements where ...
J. C. Turnbull, J. C. Turnbull, S. E. Mikaloff Fletcher, I. Ansell, G. W. Brailsford, R. C. Moss, M. W. Norris, K. Steinkamp   +7 more
doaj   +1 more source

Soil fertility and drought interact to determine large variations in wood production for a hyperdominant Amazonian tree species

Frontiers in Forests and Global Change, 2023
IntroductionThe productivity of the Amazon Rainforest is related to climate and soil fertility. However, the degrees to which these interactions influence multiannual to decadal variations in tree diameter growth are still poorly explored.MethodsTo fill ...
Flavia Machado Durgante, Flavia Machado Durgante, Niro Higuchi, Shinta Ohashi, John Ethan Householder, Adriano José Nogueira Lima, Moriyoshi Ishizuka, Florian Wittmann, Florian Wittmann, Joaquim dos Santos, Vilany Matilla Colares Carneiro, Xiaomei Xu, Claudete Catanhede do Nascimento, Jochen Schöngart, Maria Teresa Fernandez Piedade, Adalberto Rodrigo Kossmann Schmitt, Yanka Laryssa Almeida Alves, Jennifer Lehman, Bruno Oliva Gimenez, Bruno Oliva Gimenez, Priscilla Maia Baggio, Lucas Kosvoski de Ourique, Susan Trumbore, Susan Trumbore   +23 more
doaj   +1 more source

Human palaeoenvironment in the Upper Kama River basin: experience of reconstruction [PDF]

Вестник археологии, антропологии и этнографии, 2021
Here, we present the results of comprehensive (archaeological and palaeoecological) studies undertaken in 2014–2018 in the basin of the Upper Kama River in the north of Perm Region, eastern part of the East European Plain.
Lychagina E.L., Demakov D.A., Chernov A.V., Zaretskaya N.E., Kopytov S.V., Lapteva E.G., Trofimova S.S.   +6 more
doaj   +1 more source