| 贵州荔波1200年来石笋高分辨率的古气候环境记录 |
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| 关键词:stalagmite age dating of ICP-MS high resolution paleoclimate environment Longquan Cave in Libo Guizhou Province |
| 基金项目:国家自然科学基金项目(编号: 90511004 和40772216)、科技部所控项目(编号：200903)和岩溶动力学重点实验室(编号：桂科能0842008)及岩溶动力系统与碳循环(编号：1212010911062) |
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| 摘要: |
| A High Resolution Paleoclimate Record of the Last 1,200 Years in Stalagmite L2 from the Longquan Cave, Guizhou Province |
| The time sequence of high resolution paleoclimatic change since 1200 a BP was reconstructed by age dating of the high precision ICP-MS-230Th-U series and an analysis of stable isotopes for a stalagmite of Longquan Cave in Libo, Guizhou. The results show that the monsoon climate from stalagmite L2 record since 1200 a BP has experienced eight stages, i.e., the warm stage of 1200~1100 a BP, the cold stage of 1100~940 a BP, the warm stage of 940~840 a BP, the cold stage of 840~700 a BP, the warm stage of 700~450 a BP, the cold stage of 450~300 a BP, the warm stage of 300~200 a BP and the cold stage of 200~70 a BP on the century time scale of dry-humid and cold-warm changes. In addition, a series of decade time scales of climate changes were superimposed on the century time scale of monsoon climate undulation. The records from stalagmite L2 reveal the instability of the climate of the East Asian monsoon and the periodical change since 1200 a BP. Being very similar to ice core records, the climate changes suggest that the century time scale of the monsoon climate changes from stalagmite records in the low latitude region has a wonderful correlation with the climate change in the high latitude region and the Arctic pole, and that the monsoon rainfall of the century time scale stalagmite record is mainly driven and controlled by the solar action and radiation. Moreover, the rainfall or drought events of the East Asian monsoon are closely related to the solar radiation intensity. The understanding of the changes of modern climate systems is of important scientific significance in forecasting the driving mechanism of climatic evolution in future. |
| ZHANG Mei-liang,ZHU Xiao-yan,CHENG Hai,LIN Yu-shi,QIN Jia-ming,RAN Jing-cheng,WANG Hua,HE Shi-yi.2009.A High Resolution Paleoclimate Record of the Last 1,200 Years in Stalagmite L2 from the Longquan Cave, Guizhou Province[J].Acta Geoscientica Sinica,30(6):831-840. |
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