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CNS and isotopes of sediment core SAC05 from Sacrower See, NE Germany

Biogenic silica of sediment core SAC05 from Sacrower See, NE Germany

X-ray fluorescence (XRF) and magnetic susceptibility measurements of sediment core SAC05 from Sacrower See, NE Germany

Physical and chemical parameters of sediment core SAC05 from Sacrower See (NE Germany) provide a robust reconstruction of climate change and human impact since 13,000 cal. BP

The 11.8 m-long composite sediment record from the hardwater lake of Sacrower See, located near the city of Potsdam (north-eastern Germany), has been characterised by a range of analytical techniques. These include magnetic susceptibility, chemical parameters (XRF core scanning, CNS analysis, biogenic silica) and stable isotopes (13C, 15N). The chronology covers the entire Holocene and the concluding Lateglacial (Alleröd, Younger Dryas) and is based on age-depth modelling using radiocarbon dates refined by the onset of the local varve chronology in 1870 CE (Lüder et al., 2006) and by the Laacher See Tephra, an isochrone dated to 13,000 cal. BP. It offers a detailed environmental reconstruction providing insights into depositional processes influenced by both natural climatic variations and human activities (Enters et al., 2009; Kirilova et al., 2009). The Lateglacial and Early Holocene are distinguished by the stabilisation of natural landscapes characterised by the presence of pine-birch (Alleröd) and mixed oak forests (Early Holocene). This development was interrupted by the climatic deterioration of the Younger Dryas, which resulted in a destabilisation of vegetation and increased natural soil erosion. It is evident that, for the first time around 5500 cal. BP, anthropogenic forest clearing became a factor, which subsequently led to increasing cultural soil erosion further accelerating during the Bronze Age (3600-3200 cal. BP), the Early Iron Age (2800-2600 cal. BP) and the Middle Ages (900-600 cal. BP). In the course of industrialisation since the 19th century, human impact underwent a transition from the destabilisation of soils to the phenomenon of eutrophication. This transition resulted in the occurrence of hypolimnetic anoxia, accompanied by the formation of carbonaceous varves.

GEMAS – Geochemische Kartierung der Acker- und Grünlandböden Europas, Erweiterter Datensatz

GEMAS (Geochemical Mapping of Agricultural and Grazing Land Soil in Europe) ist ein Kooperationsprojekt zwischen der Expertengruppe „Geochemie“ der europäischen geologischen Dienste (EuroGeoSurveys) und Eurometeaux (Verbund der europäischen Metallindustrie). Insgesamt waren an der Durchführung des Projektes weltweit über 60 internationale Organisationen und Institutionen beteiligt. In den Jahren 2008 und 2009 wurden in 33 europäischen Ländern auf einer Fläche von 5 600 000 km² insgesamt 2219 Ackerproben (Ackerlandböden, 0 – 20 cm, Ap-Proben) und 2127 Grünlandproben (Weidelandböden, 0 – 10 cm, Gr-Proben) entnommen. In den Proben wurden 52 Elemente im Königswasseraufschluss, 41 Elemente als Gesamtgehalte sowie TC und TOC bestimmt. Ergänzend wurde in den Ap-Proben zusätzlich 57 Elemente in der mobilen Metallionenfraktion (MMI®) sowie die Bleiisotopenverhältnisse untersucht. Alle analytischen Untersuchungen unterlagen einer strengen externen Qualitätssicherung. Damit liegt erstmals ein qualitätsgesicherter und harmonisierter geochemischer Datensatz für die europäischen Landwirtschaftsböden mit einer Belegungsdichte von einer Probe pro 2 500 km² vor, der eine Darstellung der Elementgehalte und deren Bioverfügbarkeit im kontinentalen (europäischen) Maßstab ermöglicht. Die Downloaddateien enthalten einen gegenüber dem Originaldatensatz um die Daten aus der Ostukraine sowie im Elementspektrum erweiterten Datensatz (*.xlsx , *.csv). Zusätzlich wird eine Dateidokumentation (Struktur und Merkmale) bereitgestellt.

Oxygen micro profiles of multi-corer sediment core HE595_98-3

This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).

Oxygen micro profiles of multi-corer sediment core HE595_41-4

This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).

Oxygen micro profiles of multi-corer sediment core HE595_6-1

This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).

Oxygen micro profiles of multi-corer sediment core HE595_48-3

This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).

Oxygen micro profiles of multi-corer sediment core HE595_67-5

This dataset includes onboard measurements of 100 μm vertical resolution oxygen micro-profiles from multi-corer cores retrieved during RV Heincke expeditions HE595 in 2022. Three to five measurements for each core were performed using micro-optodes with a tip diameter of 50 µm (OXR50, High Speed, Pyroscience). The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea).

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