Results 31 to 40 of about 112,190 (278)
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
Frontiers in Marine Science, 2022 The Canadian Arctic is warming three times faster than the rest of the planet. The impact of climate change on the Arctic carbon cycle, and in particular for Baffin Bay, remains poorly constrained.
Aislinn Fox, Brett D. Walker
doaj +1 more source
Removal of Refractory Dissolved Organic Carbon in the Amundsen Sea, Antarctica. [PDF]
, 2020 The removal mechanism of refractory deep-ocean dissolved organic carbon (deep-DOC) is poorly understood. The Amundsen Sea Polynya (ASP) serves as a natural test basin for assessing the fate of deep-DOC when it is supplied with a large amount of fresh-DOC
Druffel, Ellen RM +6 more
core
Assessment of oxygen plasma ashing as a pre-treatment for radiocarbon dating [PDF]
, 2009 This study investigates the potential of low-temperature oxygen plasma ashing as a technique for decontaminating charcoal and wood samples prior to radiocarbon dating.
Apperley, D. +5 more
core +1 more source
Transport of Aged Dissolved Organic Carbon via the Surface Current Revealed by Radiocarbon
Geophysical Research Letters, 2023 The East Sea (also known as the Japan Sea) is connected to the Northwest Pacific via shallow straits and has independent deep water circulation, as a model miniature ocean. The radiocarbon age of dissolved organic carbon (DOC) in the East Sea ranged from
Yeongjin Ryu +5 more
doaj +1 more source
Copenhagen Radiocarbon Dates VI [PDF]
Radiocarbon, 1960 The following list comprises a selected number of measurements made up to November 1963. Age calculations are based on a contemporary value equal to 95% of the activity of the NBS oxalic-acid standard, and on a half life for C14of 5570 ± 30 yr.Results are expressed in years before 1950 and in the b.c.-a.d. scales.
openaire +5 more sources
Łódź Radiocarbon Dates III [PDF]
Radiocarbon, 1984 The results presented in this list were obtained from 1986 to 1989. Equipment, measurement and treatment of samples are as reported previously (Kanwiszer & Trzeciak 1984: 111). Age calculations are based on a contemporary value equal to 95% of the activity of NBS oxalic acid standard and on the conventional half-life for 14C of 5568 ± 30 years ...
Andrzej Kanwiszer, Paweł Trzeciak
openaire +3 more sources
Radiocarbon Measurements Reveal Underestimated Fossil CH4 and CO2 Emissions in London
Geophysical Research Letters, 2023 Radiocarbon (14C) is a powerful tracer of fossil emissions because fossil fuels are entirely depleted in 14C, but observations of 14CO2 and especially 14CH4 in urban regions are sparse.
Giulia Zazzeri +8 more
doaj +1 more source
Groningen Radiocarbon Dates IV [PDF]
Radiocarbon, 1963 An attempt has been made to assemble the large number of C14 dates measured in Groningen since the last date list was published in 1958. We have not succeeded in preparing all the measurements done in this time; the present list contains a more or less random selection. It is hoped the rest will be included in next year's list.
J. C. Vogel, H. T. Waterbolk
openaire +3 more sources
Ecology and Evolution, 2020 Food web dynamics are vital in shaping the functional ecology of ecosystems. However, trophic ecology is still in its infancy in groundwater ecosystems due to the cryptic nature of these environments.
Mattia Saccò +9 more
doaj +1 more source