Details

Autor(en) / Beteiligte

• Leavitt, S.W
• Long, A

Titel

Sampling strategy for stable carbon isotope analysis of tree rings in pine [Carbon 12/carbon 13 ratio]

Ist Teil von

• Nature (London), 1984-01, Vol.311 (5982), p.145-147

Ort / Verlag

London: Nature Publishing

Erscheinungsjahr

1984

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Stable carbon isotope measurements in tree rings have been explored as potential indicators of past climate, and as proxy data for reconstructions of the history of super(13)C/ super(12)C variations of atmospheric carbon dioxide as related to the global carbon cycle. Results of these studies are often conflicting, perhaps partly due to the limited style of sampling natural systems with large inherent spatial variability. The authors have examined stable carbon isotopic trends in tree rings among several radii of the same tree (Pinus edulis Engelm.) and among several trees from the same site, to determine the extent of this variability. The circumferential range in delta super(13)C values of cellulose is similar to 1-1.5ppt., whereas among individuals it is similar to 2-3 ppt. Tests to determine how well various combinations of cores fit the trend of an individual tree or of the site as a whole indicate that pooling four cores from four trees accurately represent site delta super(13)C trends and absolute values.