The timing and structure of the 8.2 ka event revealed through high-resolution speleothem records from northwestern Madagascar
文献类型：期刊论文
| 作者 | Duan, Pengzhen1; Li, Hanying1; Sinha, Ashish2; Voarintsoa, Ny Riavo G.3; Kathayat, Gayatri1; Hu, Peng4; Zhang, Haiwei1; Ning, Youfeng1; Cheng, Hai1,5,6 |
| 刊名 | QUATERNARY SCIENCE REVIEWS
 |
| 出版日期 | 2021-09-15 |
| 卷号 | 268页码:9 |
| ISSN号 | 0277-3791 |
| 关键词 | Speleothem Madagascar The 8.2 ka event Two-stage structure |
| DOI | 10.1016/j.quascirev.2021.107104 |
| 通讯作者 | Li, Hanying(hanyingli@xjtu.edu.cn) ; Cheng, Hai(cheng021@xjtu.edu.cn) |
| 英文摘要 | Although the 8.2 ka event is a well-known globally documented abrupt climate event, its detailed expression in tropical southeastern Africa is poorly constrained. Here we present a high resolution and precisely dated record of the regional hydroclimatic variability between 8.5-7.5 ka BP from a polymorphic speleothem (ABC-1) from northwestern Madagascar. In combination with the exclusive recurrences of calcite layers (indicative of wetter conditions), the distinctly negative excursions in the ABC-1 delta O-18 record manifest a wet 8.2 ka event that spanned from 8.230 to 8.053 ka BP. The event is characterized by the replacement of shorter-term (interannual to interdecadal) delta O-18-delta C-13 coherence with the longer-term (multidecadal to centennial) coherence, suggesting a stable and well-developed forest system during the 8.2 ka event. Our data reveal a two-stage structure of the 8.2 ka event, which is superimposed with two brief pluvial episodes in each stage. The widely documented two peaks/troughs during Stage-I suggest rapid propagation of climate signal through atmospheric processes triggered initially by the freshwater forcing, whereas the divergent behaviors of the peaks/troughs in Stage-II in different climate systems may suggest a different forcing. (C) 2021 Elsevier Ltd. All rights reserved. |
| WOS关键词 | AFRICAN HUMID PERIOD ; CLIMATE-CHANGE ; ATLANTIC REGION ; ANJOHIBE CAVE ; VARIABILITY ; STALAGMITES ; FREQUENCY ; MONSOON ; PHASES ; OCEAN |
| 资助项目 | National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41731174] ; Frontier Institute of Science and Technology, Xi'an Jiaotong University, China |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000692518500004 |
| 资助机构 | National Natural Science Foundation of China ; Frontier Institute of Science and Technology, Xi'an Jiaotong University, China |
| 源URL | [http://ir.ieecas.cn/handle/361006/16975]  |
| 专题 | 地球环境研究所_黄土与第四纪地质国家重点实验室（2010~） |
| 通讯作者 | Li, Hanying; Cheng, Hai |
| 作者单位 | 1.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China 2.Calif State Univ Dominguez Hills, Dept Earth Sci, Carson, CA 90747 USA 3.Univ Houston, Dept Earth & Atmospher Sci, Houston, TX 77204 USA 4.Chinese Acad Sci, Inst Atmospher Phys, Beijing 100190, Peoples R China 5.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 6.CAGS, Inst Karst Geol, Key Lab Karst Dynam, MLR, Guilin 541004, Peoples R China |
| 推荐引用方式 GB/T 7714 | Duan, Pengzhen,Li, Hanying,Sinha, Ashish,et al. The timing and structure of the 8.2 ka event revealed through high-resolution speleothem records from northwestern Madagascar[J]. QUATERNARY SCIENCE REVIEWS,2021,268:9. |
| APA | Duan, Pengzhen.,Li, Hanying.,Sinha, Ashish.,Voarintsoa, Ny Riavo G..,Kathayat, Gayatri.,...&Cheng, Hai.(2021).The timing and structure of the 8.2 ka event revealed through high-resolution speleothem records from northwestern Madagascar.QUATERNARY SCIENCE REVIEWS,268,9. |
| MLA | Duan, Pengzhen,et al."The timing and structure of the 8.2 ka event revealed through high-resolution speleothem records from northwestern Madagascar".QUATERNARY SCIENCE REVIEWS 268(2021):9. |
入库方式： OAI收割
来源：地球环境研究所
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