Radiocarbon in tree rings from a clean air region in Slovakia

0524675 - ÚJF 2021 RIV GB eng J - Článek v odborném periodiku
Kontul, I. - Světlík, Ivo - Povinec, P. P. - Pachnerová Brabcová, Kateřina - Molnár, M.
Radiocarbon in tree rings from a clean air region in Slovakia.
Journal of Environmental Radioactivity. Roč. 218, č. 7 (2020), č. článku 106237. ISSN 0265-931X. E-ISSN 1879-1700
Grant CEP: GA MŠMT EF16_019/0000728
Institucionální podpora: RVO:61389005
Klíčová slova: accelerator mass spectrometry * radiocarbon * Suess effect * tree rings
Obor OECD: Environmental sciences (social aspects to be 5.7)
Impakt faktor: 2.674, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.jenvrad.2020.106237

In order to study radiocarbon levels at a clean air location in Slovakia with no significant local anthropogenic effects, we took tree ring samples from a tree in the vicinity of Jasna recreational area in the Low Tatras region in the central part of Slovakia. There are no significant local fossil fuel emission sources, so these samples represent a regional clean air background important for C-14 studies in Slovakia and Central Europe. The growth rings from the sampled tree (European spruce, Picea abies) cover the period from 1911 to 2016. The first part of the data (1911-1952) represents natural radiocarbon levels influenced by Suess effect. The following period exhibits an increase in radiocarbon levels due to atmospheric nuclear weapons tests (Delta C-14 maximum of 850 parts per thousand in 1964), and then a gradual decrease characterized by an exponential trend with time constant of 14.3 +/- 0.5 years. The Delta C-14 data from Jame was used as a reference for comparison with two previously reported modern tree ring data sets from Slovakia. This comparison showed that radiocarbon levels at both locations are lower than clean air reference values, indicating the influence of local fossil fuel emissions.
Trvalý link: http://hdl.handle.net/11104/0309003