Imprints of Rapid Climate Changes and human activity on Holocene hydro-sedimentary dynamics in Central Europe (loess-covered Weiße Elster model region)

气候快速变化和人类活动对中欧全新世水力沉积动力学的影响（黄土覆盖的Weie Elster模型区）

• 批准号: 329664411
• 负责人: Professor Dr. Peter Ettel
• 金额: --
• 依托单位: Bereich Geschichte (GES)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/329664411?language=en
• 关键词: Imprints; Rapid; Climate; Changes; human

In sub-continental Central Europe the Weiße Elster model region reveals a loess-covered drainage basin that features a high fluvio-geomorphological sensitivity towards Holocene hydro-climatic shifts. This is indicated by multiple, horizontally bedded soil-sediment sequences within the Weiße Elster floodplain lithostratigraphy. We postulate that the Weiße Elster floodplain reveals an extraordinary high potential to preserve global Rapid Climate Changes (RCCs).For the first time we aim to detect RCC signals in a Central European fluvio-chronostratigraphical record. A robust chronological model will predominantly base on OSL dating. Flood phases with overbank deposition and phases of alluvial soil formation will be systematically compared with multi-centennial-scale RCC records to detect probable linkages between flood dynamics and climate. Within the loess-covered Weiße Elster drainage basin newly recorded colluvial sequences will be used as proxies for a probable human impact during the Holocene. We will stratigraphically link Weiße Elster fluvial and colluvial records by surveying the intercalation zones of both kinds of archives. This allows a better indication of the hydro-sedimentary coupling or de-coupling of fluvial and colluvial sub-systems, and thus a better understanding of probable internal thresholds and sedimentary cascades.Within the Weiße Elster drainage basin we aim to reconstruct for the first time a coherent and diachronic archaeological and historical data set of human occupation and land use from the Early Neolithic until the High Middle Ages. The archaeological reconstruction will base on the compilation of published archaeological and historical data, field reports, available historical databases and GIS datasets of the three archaeological state departments in Saxony, Saxony-Anhalt and Thuringia. For selected, representative Weiße Elster sub-basins, we aim to reconstruct high-resolution coherent and diachronic archaeological and historical data sets of the spatial distribution of known artefacts, structures and sites as well as documented land use in written sources. To do so, all relevant sources will be systematically re-analysed. We will evaluate different land use intensities based on a semi-quantitative approach. The coupling of archaeological and historical proxy data with geomorphological hillslope-floodplain chronostratigraphies will be used to evaluate the diachronic interaction of land use and sediment re-deposition within the Weiße Elster drainage basin. Finally, we aim to compare chronologically and semi-quantitatively probable imprints of Rapid Climate Changes and human activity within the fragile Weiße Elster hillslope-floodplain system. Reconstructed geomorphological vulnerabilities and thresholds regarding climatic and human impacts should allow a step forward in understanding complex and non-linear Holocene hydro-sedimentary dynamics of highly sensitive loess-covered landscapes in Central Europe.

在中欧次大陆的Weiße埃尔斯特模型区域揭示了一个黄土覆盖的流域盆地，其特征是对全新世水文气候变化具有很高的河流地貌敏感性。Weiße埃尔斯特洪泛平原岩石地层学中的多个水平层状土壤-沉积物序列表明了这一点。我们假设，Weiße埃尔斯特洪泛区揭示了一个非常高的潜力，以保持全球快速气候变化（RCCs）。一个强大的年代学模型将主要基于OSL测年。洪水阶段与漫滩沉积和冲积土形成的阶段将系统地比较与多百年规模的RCC记录，以检测洪水动力学和气候之间可能的联系。在黄土覆盖的Weiße埃尔斯特流域盆地内，新记录的崩积序列将被用作全新世期间可能的人类影响的代理。我们将通过测量两种档案的夹层带，在地层学上联系Weiße埃尔斯特河流和崩积记录。这使得一个更好的指示的水文沉积耦合或河流和崩积子系统的解耦，从而更好地了解可能的内部阈值和沉积cascades.Within的Weiße埃尔斯特流域盆地，我们的目标是重建第一次一个连贯的和历时性的考古和历史数据集的人类占领和土地利用从新石器时代早期到中世纪盛期。考古重建将基于萨克森、萨克森-安哈尔特和图林根州三个国家考古部门公布的考古和历史数据、实地报告、现有历史数据库和地理信息系统数据集的汇编。对于选定的，有代表性的Weiße埃尔斯特子流域，我们的目标是重建高分辨率的连贯性和历时性的考古和历史数据集的空间分布已知的文物，结构和网站，以及书面来源记录的土地使用。为此，将系统地重新分析所有相关来源。我们将采用半定量的方法评估不同的土地利用强度。考古和历史的代理数据与地貌山坡洪泛平原年代地层学的耦合将被用来评估Weiße埃尔斯特流域内的土地利用和沉积物再沉积的历时相互作用。最后，我们的目标是比较年代和半定量的快速气候变化和人类活动的可能印记脆弱的Weiße埃尔斯特山坡洪泛区系统。重建地貌脆弱性和阈值的气候和人类的影响，应允许在了解复杂的和非线性的全新世水文沉积动力学的高度敏感的黄土覆盖的景观在中欧前进了一步。