| Two phases of the Holocene East African Humid Period: Inferred from a high-resolution geochemical record off Tanzania | |
| Liu, Xiting1,2,3; Rendle-Buehring, Rebecca2,3; Kuhlmann, Holger2,3; Li, Anchun1 | |
| 2017-02-15 | |
| 发表期刊 | EARTH AND PLANETARY SCIENCE LETTERS
 |
| 卷号 | 460页码:123-134 |
| 文章类型 | Article |
| 摘要 | During the Holocene, the most notably climatic change across the African continent is the African Humid Period (AHP), however the pace and primary forcing for this pluvial condition is still ambiguous, particularly in East Africa. We present a high-resolution marine sediment record off Tanzania to provide insights into the climatic conditions of inland East Africa during the Holocene. Major element ratios (i.e., log-ratios of Fe/Ca and Ti/Ca), derived from X-Ray Fluorescence scanning, have been employed to document variations in humidity in East Africa. Our results show that the AHP is represented by two humid phases: an intense humid period from the beginning of the Holocene to 8 ka (AHP I); and a moderate humid period spanning from 8 to 5.5 ka (AHP II). On the basis of our geochemical record and regime detection, the termination of the AHP initiated at 5.5 ka and ceased around 3.5 ka. Combined with other paleoclimatic records around East Africa, we suggest that the humid conditions in this region responded to Northern Hemisphere (NH) summer insolation. The AHP I and II might have been related to an eastward shift of the Congo Air Boundary and warmer conditions in the western Indian Ocean, which resulted in additional moisture being delivered from the Atlantic and Indian Oceans during the NH summer and autumn, respectively. We further note a drought event throughout East Africa north of 10 degrees S around 8.2 ka, which may have been related to the southward migration of the Intertropical Convergence Zone in response to the NH cooling event. (C) 2016 Elsevier B.V. All rights reserved. |
| 关键词 | African Humid Period Intertropical Convergence Zone Congo Air Boundary Holocene X-ray Fluorescence Scanner |
| DOI | 10.1016/j.epsl.2016.12.016 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000393008500014 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 版本 | 出版稿 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/136347 |
| 专题 | 海洋地质与环境重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Marine Geol & Environm, Inst Oceanol, Qingdao 266071, Peoples R China 2.Univ Bremen, MARUM Ctr Marine Environm Sci, D-28359 Bremen, Germany 3.Univ Bremen, Fac Geosci, D-28359 Bremen, Germany |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Liu, Xiting,Rendle-Buehring, Rebecca,Kuhlmann, Holger,et al. Two phases of the Holocene East African Humid Period: Inferred from a high-resolution geochemical record off Tanzania[J]. EARTH AND PLANETARY SCIENCE LETTERS,2017,460:123-134. |
| APA | Liu, Xiting,Rendle-Buehring, Rebecca,Kuhlmann, Holger,&Li, Anchun.(2017).Two phases of the Holocene East African Humid Period: Inferred from a high-resolution geochemical record off Tanzania.EARTH AND PLANETARY SCIENCE LETTERS,460,123-134. |
| MLA | Liu, Xiting,et al."Two phases of the Holocene East African Humid Period: Inferred from a high-resolution geochemical record off Tanzania".EARTH AND PLANETARY SCIENCE LETTERS 460(2017):123-134. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| Two phases of the Ho（2999KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 | |
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