Journal cover Journal topic
Climate of the Past An interactive open-access journal of the European Geosciences Union
doi:10.5194/cp-2017-4
© Author(s) 2017. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
10 Mar 2017
Review status
This discussion paper is under review for the journal Climate of the Past (CP).
Dendrochronologically dated pine stumps document phase wise bog expansion at a northwest German site between c. 6700 BC and c. 3400 BC
Inke Elisabeth Maike Achterberg1, Jan Eckstein1, Bernhard Birkholz1, Andreas Bauerochse2, and Hanns Hubert Leuschner2 1Department for Palynology and Climate Dynamics, University of Göttingen, 37073 Göttingen, Germany
2Lower Saxony State Service of Cultural Heritage, 30175 Hannover, Germany
Abstract. This is a dendrochronological investigation of a mire site densely covered by peat-preserved pine stumps (Pinus sylvestris). The site in the northwest German Tote Moor revealed to feature trees from various Holocene millennia. The dendrochronologically dated site chronology covers 2345 years between 6703 BC and 3403 BC, containing 5 gaps between 6 and 550 years in length. It consists of 477 trees. A floating chronology segment of 309 years, containing 30 trees, was radiocarbon dated to the beginning of the 7th millennium cal. BC. The tree ring data from the site documents environmental changes over a larger period of time. Furthermore, the site is covered densely with in situ tree stumps from the fen-bog transition. This facilitates the spatio-temporal reconstruction of mire development, which is based on 212 in situ tree stumps in the case study presented here. Peat-stratigraphical survey was carried out additionally, and elevations a.s.l. were determined at several locations.

Tree die-off phases, which indicate the local water level rise, mostly in context of the local fen-bog transition, are evident for c. 6600–6450 BC, c. 6350–5750 BC, c. 5300–4900 BC, c. 4700–4550 BC, c. 3900–3850 BC, 3700–3600 BC, c. 3500–3450 BC and c. 3400 BC.


Citation: Achterberg, I. E. M., Eckstein, J., Birkholz, B., Bauerochse, A., and Leuschner, H. H.: Dendrochronologically dated pine stumps document phase wise bog expansion at a northwest German site between c. 6700 BC and c. 3400 BC, Clim. Past Discuss., doi:10.5194/cp-2017-4, in review, 2017.
Inke Elisabeth Maike Achterberg et al.
Inke Elisabeth Maike Achterberg et al.
Inke Elisabeth Maike Achterberg et al.

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Short summary
The timing of bog expansion is being explored. On a northwest German bog site a layer of peat-preserved pine stumps was exposed. The tree stumps were precisely dated using tree-ring widths. They grew between 6703 and 3403 BC at the rim of the raised bog and were preserved by its expansion. The bog expansion at the site was reconstructed using the dates and locations of the tree stumps. The raised bog expansion appears to have taken place in phases, which likely correspond to climatic variation.
The timing of bog expansion is being explored. On a northwest German bog site a layer of...
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