Millennial-scale terrestrial ecosystem responses to Upper Pleistocene climatic changes: 4D-reconstruction of the Schwalbenberg Loess-Palaeosol-Sequence (Middle Rhine Valley, Germany)
Millennial-scale terrestrial ecosystem responses to Upper Pleistocene climatic changes: 4D-reconstruction of the Schwalbenberg Loess-Palaeosol-Sequence (Middle Rhine Valley, Germany)
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DOI：
10.1016/j.catena.2020.104913
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发表时间：
2021-01-01
期刊：
影响因子：
6.2
通讯作者：
Voett, Andreas
中科院分区：
文献类型：
--
作者：
Fischer, Peter;Joeris, Olaf;Voett, Andreas
中欧地区的黄土-古土壤层序（LPS）提供了出色的陆地多基因和多相档案，可响应不同时空尺度上的过去气候和环境。然而，到目前为止，LPS 形成所涉及的地貌和成土过程及其与生态条件变化的相互作用，阻碍了与其他古环境档案的强有力的相关性。施瓦尔本贝格 LPS 覆盖在中欧西部莱茵河谷中部的一个山坡上，提供了独特的高分辨率记录，非常适合研究其形成过程以及上更新世期间与气候影响的关系。在这里，我们展示了 Schwalbenberg LPS 在四个维度上的第一个综合多代理数据集。我们利用地面地球物理勘探与直推水力剖面相结合，沿代表性斜坡横断面进行系统分析，以详细描述地下地层特征。我们整合了来自三个长沉积物岩心和两个剖面部分的选定沉积学和地球化学代理数据，为施瓦尔本贝格 LPS 构建了完整的地层序列。我们表明，样线方法可以量化不同的形成阶段，无论是累积性的、侵蚀性的还是成土性的。通过这样做，我们克服了各个部分研究中固有的偏见，并实现了与其他气候档案的稳健和可靠的相关性。对于类似于 80-15 ka BP 的时间间隔，施瓦尔本贝格的综合岩石地层特征和有机碳含量与 Sofular 和 NGRIP delta O-1(8) 记录的相关性可以在千年到百年尺度分辨率下建立，比迄今为止该地区已知的任何其他陆地档案更详细地强调了西欧 LPS 对大西洋驱动的气候振荡的敏感性。
Loess-Palaeosol-Sequences (LPS) in the Central European region provide outstanding terrestrial polygenetic and multiphase archives responding to past climate and environments over various spatial and temporal scales. As yet, however, the geomorphological and pedogenic processes involved in LPS formation, and their interplay with changes in ecological conditions, impede robust correlation with other palaeoenvironmental archives. The Schwalbenberg LPS, which drape a hillslope in the Middle Rhine Valley in western Central Europe, provide unique high-resolution records highly suitable for investigating the processes involved in their formation and the relationship to climatic influences during the Upper Pleistocene. Here we present the first comprehensive multiproxy dataset for the Schwalbenberg LPS over four dimensions. We undertake systematic analyses along a representative slope transect using surface-based geophysical prospection in combination with Direct Push hydraulic profiling to characterise the subsurface stratigraphy in detail. We integrate selected sedimentological and geochemical proxy data from three long sediment cores and two profile sections to build a complete stratigraphical succession for the Schwalbenberg LPS. We show that the transect approach allows quantification of different formation phases, whether accumulative, erosive or pedogenic in character. In so doing we overcome the bias inherent in studies of individual sections and enable robust and reliable correlation with other climate archives. For the time interval similar to 80-15 ka BP correlation of combined lithostratigraphic features and organic carbon contents from Schwalbenberg with the Sofular and NGRIP delta O-1(8)-records can be established at millennial to centennial scale resolution, highlighting the sensitivity of western European LPS to the Atlantic-driven climate oscillations in much more detail than in any other terrestrial archive known in the region so far.