太白山三清池湖泊沉积记录的全新世气候变化及周期讨论  

Holocene environmental change and climatic periodicities recorded from the lacustrian sediments in the Sanqing Chi section,Taibai Mountain

作　　者：宋雅琼[1] 罗耀[1] 李双成[1] 王红亚[1] 

机构地区：[1]北京大学城市与环境学院,北京100871

出　　处：《湖泊科学》2016年第4期899-908,共10页Journal of Lake Sciences

基　　金：国家自然科学基金项目(41171160)资助

摘　　要：通过对太白山三清池湖泊沉积柱芯的低频磁化率(χlf)、频率磁化率(χfd)、总有机碳(TOC)、粒度参数指标的时序序列进行小波分析,探讨太白山全新世气候变化过程及周期波动性.结果显示:中、晚全新世太白山气候变化具有明显的阶段性特征;千年尺度上,χlf、χfd、TOC和平均粒径参数序列反映的主周期分别为1427、1427、1427和1452 a,晚全新世5410 cal a B.P.距今期间存在8次显著的冷暖交替震荡;在百年尺度上,χlf、χfd、TOC和平均粒径参数序列还揭示出分别以492、492、467和467 a为周期的次一级变化,且整体上经历近似10次的短期冷暖波动.此外,以上结果与全球范围内全新世气候周期有着较好的一致性,表明我国东部高海拔地区在千年和百年尺度上,对全新世气候振荡同样具有相似的响应.With wavelet analysis, the Holocene environmental change and climatic periodicity in Taibai Mountain are analyzed based on multiple paleoclimatic proxy analysis （χlf, χfd, TOC and grain size） in the lake sediments from Sanqing Chi section. The results show obvious gradual characteristic in the periodicities and environmental change of Taibai Mountain. On a longer timescale, there is the a minennial-scale variability of Holoeene climate with periodicities of 1427 a inχlf sequence, 1427 a inχfa sequence, 1427 a in TOC sequence, and i452 a in mean particle size sequence. 8 times of significant climate shifts are examined inχlf se- quence since 5410 cal aB.P.. On a centennial scale, periodicities of 492 a, 492 a, 467 a, 467 a are identified in χlf,χfd, TOC and grain size, respectively, indicating 10 times climatic oscillation since 5410 cal aB.P.. The consistency in Holocene climatic pe- riodicity between Taibai Mountain and other regions in the world shows that the environmental response to Holocene climatic oscilla- tion also exists at high attitude area in eastern China.

关 键 词：太白山 三清池 全新世 小波分析 周期波动 气候变化 

分 类 号：P534.632[天文地球—第四纪地质学] P532[天文地球—古生物学与地层学]