Slotta, Franziska; Wacker, Lukas; Riedel, Frank; Heussner, Karl-Uwe; Hartmann, Kai; Helle, Gerhard (2019): Normalized 14C activity ratios (F14C) of an African baobab (Adansonia digitata) tree from Oman [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.905621, In: Slotta, F et al. (2019): Normalized 14C activity ratios (F14C), tree-ring width indices (RWI) and subseasonal δ13C and δ18O of tree-ring cellulose of an African baobab (Adansonia digitata) tree from Oman [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.905626
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Abstract:
Calender dating and annual character of the baobab's growth rings was confirmed by matching of highly resolved data of normalized 14C activity ratios (F14C) with the bomb peak.
Normalized 14C activity ratio (F14C) data was determined at ETH Zürich, Dep. of Earth Sciences, Labor für Ionenstrahlphysik (LIP) and was obtained from cellulose extracted with a base-acid-base-acid-bleaching procedure after (Němec et al., 2010). Cellulose samples were graphitized using an Automated Graphitization Equipment (AGE III) coupled to an elemental analyzer (EA: Vario MICRO cube; Wacker et al., 2010). Once graphitized, the samples were immediately pressed into targets to minimize their interaction with air and their 14C content was measured with a MICADAS mass spectrometer (Wacker et al., 2010a). With intention to minimize possible carry-over effects from the implementation of previous years' non-structural carbohydrates into the current year's wood cellulose, the samples for dating were selected from the last third of each growth ring structure and comprised fibres and vessels while steering clear of terminal parenchyma bands (TPB)which usually complete each Baobab tree ring. 5 individual TPBs were analyzed for 1960-1963 (n = 4) and for 2005. In addition, intra-tree-ring F14C analysis was performed on the tree rings of 1962 (6 samples) and 1963 (8 samples).
Related to:
Slotta, Franziska; Wacker, Lukas; Riedel, Frank; Heussner, Karl-Uwe; Hartmann, Kai; Helle, Gerhard (2021): High-resolution <sup>14</sup>C bomb peak dating and climate response analyses of subseasonal stable isotope signals in wood of the African baobab – a case study from Oman. Biogeosciences, 18(12), 3539-3564, https://doi.org/10.5194/bg-18-3539-2021
Further details:
Němec, Mojmír; Wacker, Lukas; Hajdas, Irka; Gäggeler, Heinz (2010): Alternative methods for cellulose preparation for AMS measurement. Radiocarbon, 52(3), 1358-1370, https://doi.org/10.1017/S0033822200046440
Wacker, Lukas; Bonani, G; Friedrich, M; Hajdas, Irka; Kromer, Bernd; Nemec, N; Ruff, M; Suter, M; Synal, Hans-Arno; Vockenhuber, C (2010): MICADAS: routine and high-precision radiocarbon dating. Radiocarbon, 52(2), 252-262, https://doi.org/10.1017/S0033822200045288
Wacker, Lukas; Němec, Mojmír; Bourquin, J (2010): A revolutionary graphitisation system: Fully automated, compact and simple. Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms, 268(7-8), 931-934, https://doi.org/10.1016/j.nimb.2009.10.067
Coverage:
Latitude: 17.050000 * Longitude: 54.600000
Date/Time Start: 2015-04-01T00:00:00 * Date/Time End: 2015-04-01T00:00:00
Minimum Elevation: 318.0 m * Maximum Elevation: 318.0 m
Event(s):
Comment:
Funding agency:
Deutsche Forschungsgemeinschaft, Grant Agreement No. HE3089/10-1 and RI 809/32-1
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Species | Species | Helle, Gerhard | |||
| 2 | Age, dated material | Dated material | Helle, Gerhard | Wood structure | ||
| 3 | Laboratory code/label | Lab label | Helle, Gerhard | Lab_ID_ETH | ||
| 4 | Sample code/label | Sample label | Helle, Gerhard | |||
| 5 | Fraction modern carbon | F14C | Helle, Gerhard | Age, 14C AMS, Mini Carbon Dating System (MICADAS) | ||
| 6 | Fraction modern carbon, standard deviation | F14C std dev | ± | Helle, Gerhard | Age, 14C AMS, Mini Carbon Dating System (MICADAS) | |
| 7 | Age | Age | a AD/CE | Helle, Gerhard | Age, tree ring | Year CE |
| 8 | AGE | Age | ka BP | Helle, Gerhard | Age, tree ring | Geocode |
License:
Creative Commons Attribution-ShareAlike 4.0 International (CC-BY-SA-4.0)
Size:
770 data points