1992
DOI: 10.1017/s0033822200064055
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14C Activity in Different Sections and Chemical Fractions of Oak Tree Rings, AD 1938–1981

Abstract: ABSTRACT, The 14C activity in rings from an oak tree grown in a suburb of Uppsala, Sweden has been studied for the period, AD 1938 to 1981. We compare the results with the atmospheric carbon dioxide records from Abisko, northern Sweden, where local or regional contamination from fossil-fuel combustion can be disregarded. We assess the influence from different chemical pretreatment procedures in use and compare HCl-NaOH-HCl treatment with cellulose extraction. We split each ring into two samples corresponding t… Show more

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Cited by 37 publications
(27 citation statements)
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“…To eliminate younger matter such as radially transported resin, the cellulose was extracted and precipitated from the drilled material [44]. Cellulose extraction and AMS preparation was done at the Radiological Dating Laboratory in Trondheim, Norway, and AMS dating at the Ångström Laboratory in Uppsala, Sweden.…”
Section: Methodsmentioning
confidence: 99%
“…To eliminate younger matter such as radially transported resin, the cellulose was extracted and precipitated from the drilled material [44]. Cellulose extraction and AMS preparation was done at the Radiological Dating Laboratory in Trondheim, Norway, and AMS dating at the Ångström Laboratory in Uppsala, Sweden.…”
Section: Methodsmentioning
confidence: 99%
“…), the samples were chemically pretreated to remove any carboncontaining materials, such as humic substances, that were not present in the original wood. The pretreatment consisted of an acid-base-acid regimen followed by treatment with NaOC1 and HCI, following methods described by Olsson and Possnert [ 1992]. The AMS radiocarbon ages were calibrated using the data set of Stuiver and Becker [ 1993] …”
Section: Gas Flow Measurementsmentioning
confidence: 99%
“…Incorporation of 14 CO 2 to the biosphere takes place via photosynthesis. A time sequence of atmospheric isotopic concentrations is recorded when 14 C is incorporated into the cell walls of annual growth rings (Olsson and Possnert, 1992;Dai and Fan, 1986), and the exceptional value of tree ring analysis in historical environmental reconstructions is increasingly recognized (e.g., Haas and Müller, 1995;Garrec et al, 1995;Padilla and Anderson, 2002). The depression of global 14 C concentrations due to fossil fuel combustion has also been demonstrated through analysis of the isotopic content in tree rings (Stuiver and Quay, 1981).…”
Section: Introductionmentioning
confidence: 99%