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引用本文:宋雅琼,罗耀,李双成,王红亚.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.湖泊科学,2016,28(4):899-908. DOI:10.18307/2016.0424
SONG Yaqiong,LUO Yao,LI Shuangcheng,WANG Hongya.Holocene environmental change and climatic periodicities recorded from the lacustrian sediments in the Sanqing Chi section, Taibai Mountain. J. Lake Sci.2016,28(4):899-908. DOI:10.18307/2016.0424
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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
宋雅琼, 罗耀, 李双成, 王红亚
北京大学城市与环境学院, 北京 100871
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,χlfχfd、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 aB.P.距今期间存在8次显著的冷暖交替震荡;在百年尺度上,χlfχfd、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.
关键词:  太白山  三清池  全新世  小波分析  周期波动  气候变化
DOI:10.18307/2016.0424
分类号:
基金项目:国家自然科学基金项目(41171160)资助.
Holocene environmental change and climatic periodicities recorded from the lacustrian sediments in the Sanqing Chi section, Taibai Mountain
SONG Yaqiong, LUO Yao, LI Shuangcheng, WANG Hongya
College of Urban and Environmental Sciences, Peking University, Beijing 100871, P.R.China
Abstract:
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 millennial-scale variability of Holocene climate with periodicities of 1427 a in χlf sequence, 1427 a in χfd sequence, 1427 a in TOC sequence, and 1452 a in mean particle size sequence. 8 times of significant climate shifts are examined in χlf sequence 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 periodicity between Taibai Mountain and other regions in the world shows that the environmental response to Holocene climatic oscillation also exists at high attitude area in eastern China.
Key words:  Taibai Mountain  Sanqing Chi  Holocene  wavelet analysis  climatic periodicity  climatic change
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