Results 31 to 40 of about 110,749 (288)
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
Journal of Space Weather and Space Climate, 2023 Cosmogenic nuclides – 14C from tree rings and 10Be and 36Cl from ice cores serve as an effective proxy for past extreme solar energetic particle (SEP) events.
Miyake Fusa +4 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 +24 more
core +1 more source
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
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
North Atlantic marine 14C reservoir effects: implications for late-Holocene chronological studies [PDF]
, 2009 We investigated surface ocean–atmosphere 14C offsets for the later Holocene at eight locations in the eastern North Atlantic. This resulted in 11 new ΔR assessments for the west coast of Ireland, the Outer Hebrides, the north coast of the Scottish ...
A.J. Dugmore +51 more
core +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
The marine ΔR For Nenumbo (Solomon Islands): A case study in calculating reservoir offsets form paired sample data [PDF]
, 2007 It is necessary to calculate location-specific marine ΔR values in order to calibrate marine samples using calibration curves such as those provided through the IntCal98 (Stuiver et al. 1998) data.
Green, Roger +4 more
core +4 more sources
Elementa: Science of the Anthropocene, 2018 The extensive release of oil during the 2010 Deepwater Horizon spill in the northern Gulf of Mexico perturbed the pelagic ecosystem and associated sinking material. To gauge the recovery and post-spill baseline sources, we measured ?14C, d13C and d34S of
Jeffrey P. Chanton +7 more
doaj +1 more source