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在建立了全新世泥炭沉积物高分辨率冬夏季风代用指标时间序列的基础上,发现青藏高原若尔盖地区全新世冬夏季风的变化具有此消彼长和同时消长两种基本的模式,冬季风与夏季风在不同时间尺度上两种模式又相互嵌套.由冬夏季风指标叠加效应合成的气候状况却有与全球同步的规律性,表现出千年-百年尺度的不稳定性,6.2KA的季风突然减弱事件要比8.0KA的事件更显著,反映了亚洲季风的区域特点或它本身就是全球气候的一个窗口.
Based on the established time series of high-resolution winter and summer monsoon indicators of peat sediments in the Holocene, it is found that the Holocene winter-monsoon change in the Zoigê area of the Qinghai-Tibet Plateau has two basic patterns of shifting and simultaneous growth and disappearance. The winter monsoon and summer The winds are nested within each other on different timescales.The climate condition synthesized by the superposition effect of the winter monsoon and the summer monsoon has the regularity with the world and shows the instability of the millenium-centennial scale and the abrupt decrease of the 6.2KA monsoon The event is more pronounced than the 8.0KA event, reflecting the regional characteristics of the Asian monsoon or itself a window to the global climate.