| 中全新世云南寻甸地区气候演化与冷干事件的石笋记录 |
| |
| 关键词:XR1 stalagmite mid-Holocene oxygen-carbon isotope Southwest Monsoon |
| 基金项目:973项目(编号: 2007CB815905); 国家自然科学基金项目(编号: 40830852); ARC项目(编号: DP0773081) |
|
| 摘要点击次数: 7675 |
| 全文下载次数: 8423 |
| 摘要: |
| Stalagmite Records of Climate Change and Cold-Dry Events During the Middle Holocene in Xundian, Yunnan |
| Based on age-dating of TIMS-U series and analyzing carbon and oxygen isotopes and deposition velocity on XR1 stalagmite from Xianren cave in Xundian, Yunnan, the authors revealed the monsoon climate change pattern during the middle Holocene in Xundian. The climate change in Xundian can be divided into three periods approximately: (1) 8.0～6.0kaBP was a warm and wet period; (2) 6.0~5.1ka BP was a climate change period, with climate changing from wet and warm to cold and dry; (3) 5.1~2.1kaBP was a climate recovering period, during which the climate changed from cold and dry to the average climate level of the Middle Holocene. The authors also detected four clod and dry climate events during the Middle Holocene in Xundian, which perfectly responded to the global change. The first climate event that lasted from 6.0 ka BP to 5.1ka BP corresponded to the cold period during the Middle Yangshao age in archaeology, and is also called the second little ice age by Denton. The second climate event whose age span was from 4.7kaBPto 4.5kaBP was a short cooling event during the climate recovering period. The third cooling event that lasted from 3.1kaBP to 2.5kaBP was called Xizhou Cold period in Chinese history, which was equivalent to the third new ice age in Northern Hemisphere. The cooling event during 2.5kaBP to 2.1kaBP corresponded to the second cold period during the past 5000 years’ climate change in China. |
| ZHANG Hui-ling,PU Xiao-qiang.2011.Stalagmite Records of Climate Change and Cold-Dry Events During the Middle Holocene in Xundian, Yunnan[J].Acta Geoscientica Sinica,32(1):95-100. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|