Hydrological dynamics and fire history of the last 1300years in western Siberia reconstructed from a high-resolution, ombrotrophic peat archive

Mariusz Lamentowicz (1, 2) , Michał Słowiński (3, 4) , Katarzyna Marcisz (1, 2) , Małgorzata Zielińska (1, 2) , Karolina Kaliszan (1) , Elena Lapshina (5) , Daniel Gilbert (6) , Alexandre Buttler (6, 7, 8) , Barbara Fiałkiewicz-Kozieł (2) , Vincent E.J. Jassey (7, 8) , Fatima Laggoun-Défarge (9) , Piotr Kołaczek (2)

1 Laboratory of Wetland Ecology and Monitoring
2 Department of Biogeography and Paleoecology
3 GFZ - German Research Centre for Geosciences - Helmholtz-Centre Potsdam
4 Department of Environmental Resources and Geohazards
5 Yugra State University
6 LCE - Laboratoire Chrono-environnement (UMR 6249)
7 Swiss Federal Institute for Forest, Snow and Landscape Research WSL
8 EPFL - Ecole Polytechnique Fédérale de Lausanne
9 ISTO - Institut des Sciences de la Terre d'Orléans - UMR7327

Siberian peatlands provide records of past changes in the continental climate of Eurasia. We analyzed a core from Mukhrino mire in western Siberia to reconstruct environmental change in this region over the last 1300 years. The pollen analysis revealed little variation of local pine-birch forests. A testate amoebae transfer function was used to generate a quantitative water-table reconstruction; pollen, plant macrofossils, and charcoal were analyzed to reconstruct changes in vegetation and fire activity. The study revealed that Mukhrino mire was wet until the Little Ice Age (LIA), when drought was recorded. Dry conditions during the LIA are consistent with other studies from central and eastern Europe, and with the pattern of carbon accumulation across the Northern Hemisphere. A significant increase in fire activity between ca. AD 1975 and 1990 may be associated with the development of the nearby city of Khanty-Mansiysk, as well as with the prevailing positive Arctic Oscillation.

Mots clés:  Testate amoebae; Pollen; Macrofossils; Transfer function; Peat; Siberia; Charcoal

Domaines: Planète et Univers [physics]; Interfaces continentales, environnement

Mariusz Lamentowicz, Michał Słowiński, Katarzyna Marcisz, Małgorzata Zielińska, Karolina Kaliszan, et al.. Hydrological dynamics and fire history of the last 1300years in western Siberia reconstructed from a high-resolution, ombrotrophic peat archive. Quaternary Research, 2015, 84, pp.312-325. ⟨10.1016/j.yqres.2015.09.002⟩. ⟨insu-01240109⟩