Results 31 to 40 of about 158,813 (385)
Isotope (14C and 13C) analysis of deep peat CO2 using a passive sampling technique [PDF]
, 2009 We developed and tested a new method to collect CO<sub>2</sub> from the surface to deep layers of a peatland for radiocarbon analysis. The method comprises two components: i) a probe equipped with a hydrophobic filter that allows entry of ...
Garnett, M.H., Hardie, S.M.L.
core +1 more source
UCLA Radiocarbon Dates VIII [PDF]
Radiocarbon, 1966 The measurements reported were made during the 2nd half of 1967 in the Isotope Lab. of the Inst. of Geophysics and Planetary Physics as a continuation of the UCLA date lists I through VII. Samples were analyzed as CO2-gas at close to one atm in a 7.5 L proportional counter with 3 energy channels described earlier.
Rainer Berger, W. F. Libby
openaire +4 more sources
Documenta Praehistorica, 2008 This paper proposes an association between climate forcing connected with the 8200 calBP ‘climate event’ and a postulated phase of internecine warfare and population collapse at Late Neolithic/Early Chalcolithic sites in Pisidia, southwestern Turkey.
Lee Clare +3 more
doaj +1 more source
TÜBİTAK 1MV Accelerator Mass Spectrometer Designed for 14C, 10Be, 26Al, 41Ca, 129I
Bulletin of the Mineral Research and Exploration, 2023 A 1 MV Accelerator Mass Spectrometer (AMS) was established at TÜBİTAK, MRC Türkiye in December 2015. The 1MV TÜBİTAK AMS system is based on a Pelletron tandem accelerator, operating up to 1.1MV.
Furkan Kulak +2 more
doaj +1 more source
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 +9 more
doaj +1 more source
The Mississippian fin de siècle in the middle Cumberland region of Tennessee [PDF]
, 2018 Bayesian chronological modeling is used to investigate the chronology for a large-scale human depopulation event during the Mississippian period (AD 1000–1600) known as the Vacant Quarter phenomenon.
Cobb, Charles R., Krus, Anthony M.
core +1 more source
Rhodesian Radiocarbon Measurements III [PDF]
Radiocarbon, 1966 The following list of dates has been obtained since the compilation of List II in December 1965. Procedures of measurement are essentially unchanged from those reported previously (SR I and SR II).
J. G. Sheppard, E. R. Swart
openaire +4 more sources
RADIOCARBON IN GLOBAL TROPOSPHERIC CARBON DIOXIDE
Radiocarbon: An International Journal of Cosmogenic Isotope Research, 2021 Since the 1950s, observations of radiocarbon (14C) in tropospheric carbon dioxide (CO2) have been conducted in both hemispheres, documenting the so-called nuclear “bomb spike” and its transfer into the oceans and the terrestrial biosphere, the two ...
I. Levin +5 more
semanticscholar +1 more source
Tartu Radiocarbon Dates IV [PDF]
Radiocarbon, 1966 The following list includes C14 dates and deals with the results of the methodological investigations carried out at the Geobiochemical Laboratory of the Institute of Zoology and Botany of the Academy of Sciences of the Estonian SSR in 1967–1968.
J. M. Punning, E. Ilves, A. Liiva
openaire +4 more sources
Frontiers in Plant Science, 2017 The age of living massive olive trees is often assumed to be between hundreds and even thousands of years. These estimations are usually based on the girth of the trunk and an extrapolation based on a theoretical annual growth rate.
Yael Ehrlich +3 more
doaj +1 more source