A Single-Year δ13C Chronology from Pinus Tabulaeformis (Chinese Pine) Tree Rings at Huangling, China
| Autor: | Shao Xuemei, Liu Rongmo, An Zhisheng, Graciela M. Gutierrez, Liu Yu, Malcolm K. Hughes, Shelley R. Danzer, Steven W. Leavitt |
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| Rok vydání: | 1995 |
| Předmět: |
010506 paleontology
Archeology 010504 meteorology & atmospheric sciences δ13C Ecology Pine tree 01 natural sciences law.invention Chine law Dendrochronology General Earth and Planetary Sciences Precipitation Radiocarbon dating Physical geography China Geology 0105 earth and related environmental sciences Chronology |
| Zdroj: | Radiocarbon. 37:605-610 |
| ISSN: | 1945-5755 0033-8222 |
| DOI: | 10.1017/s0033822200031106 |
| Popis: | Individual rings from 1899–1990 were pooled from four radii of four cross-sections obtained from trees at a managed forest site near Huangling, north of Xian in north central China. Splits of wood ground to 20-mesh were analyzed independently at both the Xian and Arizona laboratories, using their respective methods for cellulose isolation, combustion and mass-spectrometric analysis. The δ13C results were highly correlated (r2 = 0.66) and absolute values typically within 0.2–0.3‰. Inter-tree variability was estimated as 1–1.5‰. The Huangling δ13C curve shows an overall downward trend with year-to-year fluctuations of up to 1.5‰ superimposed. A subset of δ13C maxima corresponded with below-normal precipitation and above-normal temperature in May and June, and minima were associated with above-normal precipitation and below-normal temperature in May and June, perhaps signaling early arrival of the East Asian Summer Monsoon. The generally poor climate correlations with all δ13C values, however, could be a consequence of the fairly mesic environment or of human disturbance. Chronologies of isotopic discrimination (δ) and Ci/Ca had flat slopes, suggesting the δ13C trend was driven by global rather than local effects. |
| Databáze: | OpenAIRE |
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