Paleo-ENSO influence on African environments and early modern humans
Paleo-ENSO influence on African environments and early modern humans
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DOI：
10.1073/pnas.2018277118
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发表时间：
2021-06-08
影响因子：
11.1
通讯作者：
Trauth, Martin H.
中科院分区：
文献类型：
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作者：
Kaboth-Bahr, Stefanie;Gosling, William D.;Trauth, Martin H.
在这项研究中，我们综合陆地和海洋代理记录，跨越过去620千，破译泛非洲气候变化及其驱动因素和潜在的联系，以人类进化。我们发现整个非洲的水分供应之间的紧密相关性厄尔尼诺南大洋振荡（ENSO）的变化，表现的步行者环流，这是最有可能驱动的地球偏心率的变化。我们的研究结果表明，低纬度日照是泛非洲气候变化的一个突出的驱动力在中更新世晚期。我们认为，这些低纬度的气候过程，在东部和西部非洲的植被以及哺乳动物的分散和进化，增加资源丰富和稳定的生态环境被认为是重要的早期现代人类。
In this study, we synthesize terrestrial and marine proxy records, spanning the past 620 ky, to decipher pan-African climate variability and its drivers and potential linkages to hominin evolution. We find a tight correlation between moisture availability across Africa to El Nino Southern Ocean oscillation (ENSO) variability, a manifestation of the Walker Circulation, that was most likely driven by changes in Earth's eccentricity. Our results demonstrate that low-latitude insolation was a prominent driver of pan-African climate change during the Middle to Late Pleistocene. We argue that these low-latitude climate processes governed the dispersion and evolution of vegetation as well as mammals in eastern and western Africa by increasing resource-rich and stable ecotonal settings thought to have been important to early modern humans.