Introducing an improved multi-proxy approach for paleoenvironmental reconstruction of loess–paleosol archives applied on the Late Pleistocene Nussloch sequence (SW Germany)
Introducing an improved multi-proxy approach for paleoenvironmental reconstruction of loess–paleosol archives applied on the Late Pleistocene Nussloch sequence (SW Germany)
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引入改进的多代理方法，用于对晚更新世 Nussloch 序列应用的黄土古土壤档案进行古环境重建（德国西南部）
DOI：
10.1016/j.palaeo.2014.06.006
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
G.L.B.
中科院分区：
文献类型：
--
作者：
Hambach;Eckmeier;Schwark;Zöller;Löscher;Wiesenberg;G.L.B.
为了研究黄土-古土壤序列（LPS）的古环境和古气候变化，除了筛选参数外，大多数替代指标通常采用低采样密度，通常为1-2个/地层单元。这可能导致研究结果忽略了古植被效应，这些效应不仅局限于古土壤，还影响下伏黄土物质。本文利用高分辨率多代理方法研究了德国西南部Nussloch黄土-古土壤层序（LPS）的新剖面，以提高我们对中欧晚更新世记录的认识。该方法包括几个地球物理和地球化学参数，以及根相关特征的频率。粒度分布和OSL定年使新剖面与附近的标准剖面P4进行了对比，揭示了由于局部沉积条件和纵向格列达构造古地貌的小尺度变化而导致的地层单元厚度的显著变化。磁化率揭示了整个LPS在更潮湿的条件下的风化，而不是欧洲东南部和中国的LPS。它进一步使受成土过程影响的区间（下冰期至上冰期下部）与不受土壤形成明显影响的黄土之间的大致区分成为可能。颜色测量证实了这些结果，并确定了上冰期的几个古土壤。低磁化率和低Fe/Ti比值等无机地球化学参数对LPS上部的成土影响较弱或无影响。相比之下，碳含量和有机碳/氮（C/N）比的显著变化可能与高钙化根残留物（高达200根石m−2和高达12500根石m−2）在LPS的一定深度间隔内的频率有关，导致有机物的结合和降解。生物孔的频率主要来源于原根的生长，昆虫和蚯蚓的生物扰动在较小程度上也与古土壤有关，从而证实了土壤地层学。通过对易发生生物扰动的陆相沉积物进行高分辨率多代理分析和三维调查，可以提高陆相沉积档案的评价水平。
To study paleoenvironmental and paleoclimatic changes in loess–paleosol sequences (LPS), most proxies except for screening parameters have often been applied at low sampling density, typically 1–2 per stratigraphic unit. This might lead to results that overlook paleovegetation effects that were not only restricted to paleosols but also affected underlying loess material. Here, a new profile was investigated in the loess–paleosol sequence (LPS) at Nussloch, SW Germany using a high resolution multi-proxy approach to improve our understanding of the Late Pleistocene record which serves as a standard sequence in Central Europe. This approach included several geophysical and geochemical parameters, as well as frequencies of root-related features.Grain size distribution and OSL dating enabled correlation of the new section with the nearby standard profile P4, revealing considerable variations of the thickness of stratigraphic units due to local small-scale variations in depositional conditions and paleogeomorphology of longitudinal greda structures. Magnetic susceptibility revealed weathering of the entire LPS under more humid conditions than those described for SE European and Chinese LPS. It further enabled a rough differentiation between an interval that was influenced by pedogenic processes (Lower Pleniglacial to lower part of the Upper Pleniglacial), and loess that was not markedly affected by soil formation. Color measurements confirmed these results and enabled the identification of several paleosols in the Upper Pleniglacial. For the uppermost part of the LPS, low magnetic susceptibility and inorganic geochemical parameters such as low Fe/Ti ratios indicated only weak or no pedogenic influence. In contrast, considerable variations e.g. in carbonatic carbon contents and organic carbon/nitrogen (C/N) ratio might be related to the high frequency of calcified root remains (up to 200 rhizoliths m− 2and up to 12,500 microrhizoliths m− 2) in certain depth intervals of the LPS, entailing incorporation and degradation of organic matter. Frequencies of biopores, which are suggested to derive largely from former root growth and, to a lesser extent, from insect and earthworm bioturbation, were related to paleosols, and thus confirmed the pedostratigraphy.An improved assessment of terrestrial sedimentary archives can be achieved by high-resolution multi-proxy analysis and three-dimensional investigation of terrestrial sediments that are prone to bioturbation.
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影响因子：
3.9
作者：
A. Huguet;M. Gocke;S. Derenne;C. Fosse;G. Wiesenberg
通讯作者：
A. Huguet;M. Gocke;S. Derenne;C. Fosse;G. Wiesenberg
努斯洛赫黄土剖面中洛纳土壤的年代位置——欧洲黄土标志层位的重新评估
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
A. Kadereit;C. Kind;G. Wagner
通讯作者：
G. Wagner
DOI：
10.1016/j.palaeo.2013.11.010
发表时间：
2014-01
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
M. Gocke;S. Gulyás;U. Hambach;M. Jovanović;G. Kovács;S. Marković;G. Wiesenberg
通讯作者：
M. Gocke;S. Gulyás;U. Hambach;M. Jovanović;G. Kovács;S. Marković;G. Wiesenberg
黄土的14C测年
DOI：
--
发表时间：
1990
期刊：
影响因子：
--
作者：
M. Geyh
通讯作者：
M. Geyh
海德堡北部地衣上莱茵花园和日耳曼帕拉布劳恩登的森林变化
DOI：
10.3285/eg.39.1.10
发表时间：
1989
期刊：
EG Quaternary Science Journal
影响因子：
--
作者：
Manfred Löscher;T. Haag
通讯作者：
T. Haag