| 桂林响水洞600kaBP以来石笋高分辨率的气候记录 |
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| 关键词:stalagmite ages of TIMS-U series climate record Xianshiu cave of Guilin |
| 基金项目:IGCP-48国际对比项目，国家攀登计划，国家自然科学基金，，2000-026，4052002，，， |
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| 摘要: |
| High Resolution Climatic Records of Stalagmite from Xianshui Cave in Guilin since 6.00 kaBP |
| The time sequence of high resolution paleoclimatic change since the middle Holocene——6.00 ka B P has been reconstructed by ages of the high precision TIMS U series and an analysis of carbon and oxygen isotopes of stalagmite from Xianshiu cave in Guilin. Carbon and oxygen isotopic records of stalagmite section reveal that the monsoon climate changes since the middle Holocene——6.00 ka B P can be divided approximately into two climate periods:① Climate optimum time of 6.00～3.57 ka B P,during which the East Asian (or Southeast) Monsoon changed gradually from strong to weak and the climate was warm and humid; ② Temperature falling period of 3.57～0.37 ka B P,when the East Asian Summer Monsoon became weak, the Winter Monsoon became strong and the climate experienced considerable variation. This temperature falling period was intercalated with many short warm periods. Isotope records of stalagmite show that δ 18 O values of stalagmite change from negative to positive, suggesting that, during the middle Holocene climate optimum period (6.00～0.37 ka B P), the East Asian Summer Monsoon evolved from strong to weak, the Winter Monsoon changed from weak to strong, the rainfall gradually decreased, and the air temperature gradually fell. |
| ZHANG Mei-liang,YUAN Dao-xian,LIN Yu-shi,QIN Jia-ming,ZHANG Cheng,CHENG Hai.2003.High Resolution Climatic Records of Stalagmite from Xianshui Cave in Guilin since 6.00 kaBP[J].Acta Geoscientica Sinica,24(5):439-444. |
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