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《科学通报(英文版)》 2003-05
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High-resolution records of Holocene from the Shuangchi Maar Lake in Hainan Island

ZHENG Zhuo, WANG Jianghua, WANG Bing, LIU Chunlian, ZOU Heping, ZHANG Hua, DENG Yun & BAI Yan Department of Earth Sciences, Zhongshan University, Guangzhou 510275, China (e-mail: ee29@zsu.edu.cn)  
The results of sedimentary characteristics, grain-size, clay mineral, C/N and pollen analysis reveal the evolution history of the Shuangchi Maar Lake of Hainan Island as well as the short-term climate variations in tropical areas. It is testified that the Maar sediment system was sensi-tive in recording the rapid climate changes in the Holocene. These multidisciplinary results demonstrate that the thermal maximum in the Holocene climate lasted from 7200 to 2700 aBP, with several abrupt ephemeral vibrations occurring between 7250—6120 aBP and at around 4460, 3850 and 2700 aBP. In the late Holocene, particularly at ~2700 aBP, a dis-tinct environmental change indicating an important climate transition in the tropical eastern Asia was recorded, proba-bly responding to the enhancement of ENSO phenomena in the Pacific Ocean. In addition, the high-resolution algae re-cord clearly indicates periodical climate fluctuations at 500 a cyclicity during the last 2500 years.
【Fund】: the National Natural Science Foundation of China (Grant No. 40071084)
【CateGory Index】: P534.632
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