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地球学报  2008 

同步变化的东亚季风和印度季风:来自年层石笋氧同位素的证据

DOI: 10.3975/cagsb.2008.06.16

Keywords: 东亚季风,印度季风,洞穴石笋,氧同位素

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Abstract:

印度季风和东亚季风是亚洲季风的两个子系统.现代器测数据和地质历史重建记录均证明两个季风在季节和轨道尺度上具有相同的特征.然而,在年一年代际尺度上,两者的相互关系尚不清楚.笔者通过比较两个分别来自印度季风区(阿曼Defore洞)和东亚季风区(中国和尚洞)的超高分辨石笋氧同位素序列,研究780a以来印度和东亚季风变化及其相互作用.阿曼石笋氧同位素记录印度季风的变化,而和尚洞石笋δ18O则是东亚季风变化的指示器.笔者发现,在年代际尺度上阿曼石笋和中国石笋具有相同的氧同位素组成变化特征,同时反映了亚洲季风的强弱变化,表明了印度季风和东亚季风变化是同步的.

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