【摘要】 采用改进的EMD（经验模态分解）方法对前人重建的全新世石笋、冰芯氧同位素古气候记录和树轮¹⁴C含量变化太阳活动替代指标时间序列进行分析,提取到88¹10、206²20、³50、⁵20、¹ 000、² 200和⁴ 300a等二者基本一致的准周期信号,探讨了太阳活动在百千年尺度上对气候变化的可能影响。更多还原

【Abstract】 The EMD（empirical mode decomposition）method is introduced in this paper to analyze the reconstructed sequences of Holocene stalagmite and ice-core oxygen isotope records and tree ring ¹⁴C content,which document the variability of climate and solar activity respectively.The signal analysis showed that there existed multiple periods including 88¹10、206²20、³50、⁵20、¹ 000、² 200 and ⁴ 300,in both sequences.Furthermore,the impact of solar activity on the climate change is explored in centennial to millennial-scales.更多还原