首页|Climatic significance of stable carbon isotope in tree rings of Abies spectabibis in southeastern Tibet
Climatic significance of stable carbon isotope in tree rings of Abies spectabibis in southeastern Tibet
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The annually cross-dated stable carbon isotope of tree-ring α-cellulose of Abies spectabibis collected from the southeastern Tibetan Plateau is used to examine its relationship with climatic parameters. The residual △13C series in treerings is constructed after removing the effects of age trend and rising CO2. We found a close relationship between △13C in tree rings and the relative humidity of September-November of the previous year measured at the nearby Nyingchi Meteorological Station, albeit a strong "lagged effect". Thus we developed a transfer function to reconstruct the autumn relative humidity for the Nyingchi region, which explained 37.9% of the total variance (p < 0.001). Our results suggest a high frequency and moderate amplitude variance of the relative humidity before 1800, and the variance reversed afterwards.
NETL
NSTL
万方数据
