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首页> 外文期刊>Chinese science bulletin >Climate change over southern Qinghai Plateau in the past 500 years recorded in Sabina tibetica tree rings
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Climate change over southern Qinghai Plateau in the past 500 years recorded in Sabina tibetica tree rings

机译：Sabina tibetica树木年轮记录的青海高原南部近500年的气候变化

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摘要

Two tree ring-width chronologies of Sabina tibetica were developed based on cores sampled in Qumalai and Zhiduo, southern Qinghai Plateau. The response function analysis showed that the chronologies were sensitive to temperature and precipitation from April to June in the plateau. Moisture index (MI) was defined, reconstructed and extended back to AD 1550. The cross-validation method was used to check the stability of the calibration equation, and the result indicated that the equation was stable. Six severe dry periods were found in this region in the past 453-year reconstruction, which were 1592 to 1610, 1649 to 1665, 1687 to 1697, 1740 to 1750, 1818 to 1829 and 1918 to 1933. Five severe wetting periods were 1669 to 1682, 1700 to 1709, 1800 to 1814, 1898 to 1909 and 1935 to 1950. Spectrum analysis indicated that there existed long-term cycles of 60.4 and 53.4 a, solar cycle of 11 a and short-term cycles of 8, 6 and 4 a in the reconstructed series.
机译：基于青海高原南部曲马莱和直多的岩心，开发了两个西藏香柏的年轮宽度年表。响应函数分析表明，高原对4月至6月的温度和降水敏感。定义了水分指数（MI），将其重建并扩展到AD1550。使用交叉验证方法检查校准方程的稳定性，结果表明该方程是稳定的。在过去的453年重建中，该地区发现了六个严重的干旱时期，分别是1592至1610、1649至1665、1687至1697、1740至1750、1818至1829和1918至1933。五个严重的湿润时期是1669至1933年。 1682、1700到1709、1800到1814、1898到1909和1935到1950。光谱分析表明，存在60.4和53.4 a的长期周期，11 a的太阳周期和8、6和4的短期周期。重建系列中的a。

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