摘要
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-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。
Indian Monsoon and East Asian Monsoon are two sub-systems of Asian Monsoon. A common pattern between the two monsoons at the seasonal and orbital time scales was formulated from the meteorological data and geological records. However, the relationship of the two sub-systems on the inter-annual and inter-decadal scales remains quite obscure. In this study, high-resolution oxygen isotope compositions of two laminated speoleothems from the Defore Cave of Oman and the Heshang Cave of China were compared with each other to detect the link between the Indian Monsoon and the East Asian Monsoon. t^180 of Defore stalagmite is characteristic of the Indian Monsoon while δ^18O of Heshang stalagmite is an indicator of the East Asian Monsoon. Two stalagmite records show similar structures for the last 780 years on the deeadal scale, implying the asynchronous variation of the Indian Monsoon and the East Asian Monsoon.
出处
《地球学报》
EI
CAS
CSCD
北大核心
2008年第6期761-764,共4页
Acta Geoscientica Sinica
基金
国家自然科学基金重点项目(编号:40531004)资助
关键词
东亚季风
印度季风
洞穴石笋
氧同位素
Indian monsoon
East Asian monsoon
speleothem
oxygen isotope
