Results 41 to 50 of about 112,190 (278)

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 CO₂ 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

Bern Radiocarbon Dates V [PDF]

Radiocarbon, 1965
This list includes about half of the samples measured during the last year. Many studies need further investigation and the results will be published later when additional information will make better interpretations possible.The equipment and the technique is essentially the same as described earlier (Bern IV).Reliable results on CO2 samples extracted
H. Oeschger, T. Riesen
openaire   +3 more sources

Recent Warming Fuels Increased Organic Carbon Export From Arctic Permafrost

AGU Advances, 2021
Climate‐driven thawing of Arctic permafrost renders its vast carbon reserves susceptible to microbial degradation, serving as a potentially potent positive feedback hidden within the climate system.
Xiaowen Zhang, Thomas S. Bianchi, Andrea J. M. Hanna, Michael R. Shields, Gareth Izon, Jack A. Hutchings, Chien‐Lu Ping, Mikhail Kanevskiy, Negar Haghipour, Timothy I. Eglinton   +9 more
doaj   +1 more source

Iron Age to Medieval entomogamous vegetation and Rhinolophus hipposideros roost in south-eastern Wales (UK) [PDF]

, 2006
Karst cave systems are well developed in Wales (UK) and, in some instances, constitute important bat roosts. Ogof Draenen, near Blaenavon in south-east Wales, is the most recent major cave discovery (1994) with already > 70 km of passages explored ...
Bronk, Bui-Thi, Camacho, Carbonnel, Carbonnel, Carrión, Chambers, Chambers, Coles, Herrera, Jegla, Maher, Maher, Michael J. Simms, Pendleton, Proctor, Rosen, Simms, Simms, Smith, Stuiver, Suzanne A.G. Leroy, Vaughan, Waltham, Warren   +24 more
core   +1 more source

UCLA Radiocarbon Dates I [PDF]

Radiocarbon, 1962
The measurements reported in this list have been made since the Radiocarbon Dating Laboratory at the Institute of Geophysics, UCLA became operational in August 1961. CO2proportional counting was used for all measurements in an 7 · 5-L counter at 1 atm pressure.
G. J. Fergusson, W. F. Libby
openaire   +3 more sources

Quantifying the effects of switchgrass (Panicum virgatum) on deep organic C stocks using natural abundance 14C in three marginal soils

GCB Bioenergy, 2020
Perennial bioenergy crops have been shown to increase soil organic carbon (SOC) stocks, potentially offsetting anthropogenic C emissions. The effects of perennial bioenergy crops on SOC are typically assessed at shallow depths (30 cm) SOC stocks would be
Eric W. Slessarev, Erin E. Nuccio, Karis J. McFarlane, Christina E. Ramon, Malay Saha, Mary K. Firestone, Jennifer Pett‐Ridge   +6 more
doaj   +1 more source

14C Research at the Laboratory for the Analysis of Radiocarbon with AMS (LARA), University of Bern

CHIMIA, 2020
The Laboratory for the Analysis of Radiocarbon with AMS (LARA) at the University of Bern measures the radioactive carbon isotope 14C with accelerator mass spectrometry (AMS) in different applications.
Sönke Szidat
doaj   +1 more source

Diverse soil carbon dynamics expressed at the molecular level [PDF]

, 2017
The stability and potential vulnerability of soil organic matter (SOM) to global change remains incompletely understood due to the complex processes involved in its formation and turnover.
Angst, Angst, Baisden, Batjes, Berhe, Bull, Bush, C. I. Zell, C. P. McIntyre, Carvalhais, Cerli, Collister, Cooper, Dai, Davidson, Diefendorf, Doetterl, Doetterl, Doetterl, Drenzek, E. Graf Pannatier, Eglinton, Eglinton, Eglinton, Etzold, F. Hagedorn, Feng, Feng, Feng, Feng, Galy, Galy, Gong, Graf Pannatier, Graf Pannatier, Graf Pannatier, He, Hobbie, Huang, Ivy-Ochs, Jandl, Jansen, Kalbitz, Krull, Lutzow, Matsumoto, Meehl, Muhr, Murage, N. Haghipour, Paul, Petsch, Reiffarth, Rethemeyer, Rumpel, Saliot, Sanderman, Schaub, Schmidt, Schrumpf, Schrumpf, Schäfer, Simoneit, Six, Solly, Spinoni, T. I. Eglinton, T. S. van der Voort, Tao, Tipping, Torn, Voort, Walthert, Walthert, Wiesenberg, Wiesenberg, Wynn, Wynn, X. Feng, Zhang   +79 more
core   +1 more source

Monaco Radiocarbon Measurements II [PDF]

Radiocarbon, 1966
This series reports some of the measurements made since publication of the previous list. Chemical preparation of samples is basically the same as described in Monaco I.The counting electronics of the proportional counter has been entirely rebuilt by J. Galliot and P. Albertinoli of C.S.M. The new device is transistorized and battery-operated.
J. Thommeret, Y. Thommeret
openaire   +3 more sources

Mesolithic projectile variability along the southern North Sea basin (NW Europe) : hunter-gatherer responses to repeated climate change at the beginning of the Holocene [PDF]

, 2019
This paper investigates how former hunter-gatherers living along the southern North Sea coast in NW Europe adapted to long-term and short-term climatic and environmental changes at the beginning of the Holocene.
Crombé, Philippe
core   +2 more sources