Diatom oxygen isotope records of Northern Eurasia as indicators of environmental, hydrological and climate changes in the regions

Authors

  • Kostrova, S. 1
  • Bailey, H. 2
  • Biskaborn, B. 1
  • Chapligin, B. 1
  • Dvornikov, Y. 3
  • Ekaykin, A. 4
  • Fernandoy, F. 5
  • Kozachek, A. 4
  • Kuhn, G. 6
  • Ludikova, A. 7
  • Meister, P. 1
  • Nazarova, L. 1
  • Pestryakova, L. 8
  • Shibaev, Y. 4
  • Syrykh, L. 9
  • Meyer, H. 1
    • 1 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Research Unit Potsdam, Telegrafenberg A45, Potsdam, 14473, Germany
    2 Department of Ecology and Genetics, University of Oulu, Oulu, 90014, Finland
    3 Department of Landscape Design and Sustainable Ecosystems, Agrarian-Technological Institute, Рeoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya Str., 6, Moscow, 117198, Russia
    4 Arctic and Antarctic Research Institute, Bering Str., 38, St. Petersburg, 199397, Russia
    5 Laboratorio de análisis isotópico, Facultad de Ingeniería, Universidad Andrés Bello, Quillota Str., 980, Viña del Mar, 2531015, Chile
    6 Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Alten Hafen 26, Bremerhaven, 27568, Germany
    7 Institute of Limnology SPC RAS, Sevastyanova Str., 9, St. Petersburg, 196105, Russia
    8 North-Eastern Federal University of Yakutsk, Institute of Natural Sciences, Belinskogo Str., 58, Yakutsk, 677000, Russia
    9 Herzen State Pedagogical University of Russia, Moika, 48, St. Petersburg, 191186, Russia

DOI:

https://doi.org/10.31951/2658-3518-2022-A-4-1444

Keywords:

stable oxygen isotopes, hydrological fluctuations, diatoms, climate change, lake sediments

Abstract

The environmental, hydrological and climate dynamics were assessed in Northern Eurasia during the Holocene. The reconstructions are based on oxygen isotope composition of  acustrine diatom silica (δ18Odiatom) preserved in sediment cores from Ladoga, Bolshoye Shchuchye and Emanda lakes. Interpretation of the δ18Odiatom data is supported by a comprehensive study of modern isotope hydrology and analysis of local and regional proxies. The Northern Eurasia δ18Odiatom records are characterized by pronounced short term variations (1.5–5‰), pointing to the unstable climatic and hydrological conditions in the study regions. All records have clearly demonstrated a gradual depletion over the Holocene in their δ18Odiatom values by ~3–4‰, which follows the trend of decreasing summer insolation, as well as the temperature history of the Northern Hemisphere (NH), indicating a positive response of diatom oxygen isotope signal to large-scale climate changes.

Downloads

Published

2022-09-02

Issue

2022: №4 (SI:Paleo2022)

Section

Articles

License

Creative Commons License
This work is distributed under the Creative Commons Attribution-NonCommercial 4.0 International License.