Deciphering West African climate change during the last 1.1 million years

到目前为止，由于缺乏年代准确、高分辨率的陆地气候档案，对更新世时期西非气候变异性的洞察一直受到限制。关于西非气候演变的缺失信息阻碍了我们对拟议的泛非洲物种进化的理解。在这方面，博苏姆特维湖294m湖相沉积序列的初步结果，包括最后的~1.1 Ma，清楚地突出了它提供西非迄今缺失的气候基准记录的潜力。为了解释西非最后1.1 Ma的气候演化，我们建议使用位于博苏姆特维湖中心的5号站的高分辨率井下测井数据(天然伽马射线，GR)和磁化率数据。该记录的稳健性将通过参考其他井下测井和岩心数据来支持。最后，我们将把我们的发现放在西非古气候，特别是海洋参考数据集的背景下。

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.