Deciphering West African climate change during the last 1.1 million years

解读西非过去 110 万年的气候变化

• 批准号: 457479711
• 负责人: Professorin Dr. Stefanie Kaboth-Bahr
• 金额: --
• 依托单位: Leibniz-Institut für Angewandte Geophysik (LIAG)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/457479711?language=en
• 关键词: Deciphering; West; African; climate; change

Insights into the climate variability of Western Africa during the Pleistocene epoch has thus far been limited by the lack of well-dated, high-resolution terrestrial climate archives. The missing information on the climate evolution of western African hampers our understanding of the proposed pan-African evolution of our species. In this regard, the preliminary results from the ~294 m lacustrine sediment sequence of Lake Bosumtwi, encompassing the last ~1.1 Ma, clearly highlight its potential to provide the thus far missing climatic benchmark record in Western Africa. To decipher the climatic evolution during the last ~1.1 Ma in western Africa, we propose to use the high-resolution downhole logging data (natural gamma ray, GR) and magnetic susceptibility data from core logging from Site 5, which is situated in the centre of Lake Bosumtwi. The robustness of this record will be underpinned by using other downhole logs and core data as reference. Finally, we will place our findings in the context of west African paleoclimate and especially marine reference datasets.

到目前为止，由于缺乏日期明确的高分辨率陆地气候档案，对更新世时期西非气候变化的了解受到限制。关于西非气候演变的信息缺失阻碍了我们对我们物种拟议的泛非洲演变的理解。在这方面，初步结果从湖Bosumtwi的~294米湖泊沉积序列，包括最后的~1.1马，清楚地突出了它的潜力，提供迄今为止失踪的气候基准记录在西非。为了解释非洲西部过去1.1 Ma的气候演化，我们建议使用高分辨率井下测井数据（自然伽马射线，GR）和磁化率数据，从位于博萨姆特维湖中心的5号站点的岩心测井。该记录的可靠性将通过使用其他井下测井和岩心数据作为参考来加强。最后，我们将把我们的研究结果的背景下，西非古气候，特别是海洋参考数据集。