摘要
Based on the analysis of carbonate content and loss on ignition for a long sediment core (737 m in length) drilled in Heqing, the orbital scale evolution of the Southwest Monsoon is revealed, by using overlapped spectral analysis and filter methods. It is shown that the obliquity cycle and precession cycle are the key factors for the Southwest Monsoon evolution and that the change of the global ice volume and the uplift of the Qinghai-Tibetan Plateau also impose great influences on it.
Based on the analysis of carbonate content and loss on ignition for a long sediment core （737 m in length） drilled in Heqing, the orbital scale evolution of the Southwest Monsoon is revealed, by using overlapped spectral analysis and filter methods. It is shown that the obliquity cycle and precession cycle are the key factors for the Southwest Monsoon evolution and that the change of the global ice volume and the uplift of the Qinghai-Tibetan Plateau also impose great influences on it.
基金
the Key Project of the National Natural Science Foundation of China (Grant No: 40331003)
National Outstanding Youth Fund (Grant No. 40625007)
关键词
沉淀物
太平洋
季风
气候
long sediment core from Heqing, Southwest Monsoon, orbital scale evolution
