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Climate of the Past An interactive open-access journal of the European Geosciences Union
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https://doi.org/10.5194/cp-2020-45
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/cp-2020-45
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  30 Jun 2020

30 Jun 2020

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This preprint is currently under review for the journal CP.

Last 2400 yrs. Environmental changes and human activity recorded in the gyttja-type bottom sediments of the Młynek Lake (Warmia and Masuria Region, northern Poland)

Fabian Welc1, Jerzy Nitychoruk2, Leszek Marks3, Krzysztof Bińka3, Anna Rogóż-Matyszczak2, Milena Obremska4, and Abdelfattah Zalat5 Fabian Welc et al.
  • 1Institute of Archaeology, Cardinal Stefan Wyszynski University in Warsaw
  • 2Faculty of Economic and Technical Sciences, Pope John Paul II State Higher School of Education
  • 3Faculty of Geology, University of Warsaw
  • 4Polish Academy of Science, Institute of Geological Sciences
  • 5Tanta University, Faculty of Science, Tanta University

Abstract. In the densely forested Warmia and Masuria region (north-eastern Poland) there are many lakes characterized by small size, calm sedimentation and lack of tributaries, which makes them a very good archive of environmental data for the Holocene. For this reason, one of them – the Młynek Lake, located near the village of Janiki Wielkie, has been selected for multi-faceted palaeoenvironmental research based on a precise radiocarbon scale. Bottom sediments of this reservoir also contain unique information about anthropopression, because a defensive settlement has been operating on its northern shore since the early Iron Age to early Medieval period, which gives opportunity to correlate paleoenvironmental data with phases of the human activity in the last 2400 years. Between 3rd–2nd 2century BC the lake was surrounded by a dense forest with domination of warm and wet climate conditions. In turn of 2nd century BC and 2nd century AD forest around reservoir was much reduced, what can be associatedwith the first – early iron age – occupation phase attested on the strong hold located close to the lake. Between 2nd–9th century AD gradual restoration of forest and decline of human settlements is attested, along with lake deepening and onset of colder and humid climatic phase which correspond to global cooling episode known as Bond 1 (1.5 ka BP). Period between 9th–13th century AD indicates again intensive forest clearing around the lake in result of human activity (Middle Age settlement phase on stronghold). This period is characterized by climate change towards warming, which confirms the gradual 33shallowing of the lake (Middle Age warming period). Since 13 up to 17th century AD intensive cultivation34activity around lake tool place. The landscape is subjected to strong human transformations which means that environmental and climate changes are not so clear. However, changes in lake sedimentation can be seen around 1500, which may be associated with so called Little Ice Age - clod interval.

Fabian Welc et al.

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Short summary
The Młynek Lake, located near the village of Janiki Wielkie (Warmia and Masuria Region in north – east Poland) has been selected for multi-faceted palaeoenvironmental research based on a precise radiocarbon scale. Bottom sediments of this reservoir also contain unique information about anthropopression and climate changes during last 2400 years.
The Młynek Lake, located near the village of Janiki Wielkie (Warmia and Masuria Region in north...
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