Articles | Volume 19, issue 11
Biogeosciences, 19, 2759–2777, 2022
https://doi.org/10.5194/bg-19-2759-2022
Biogeosciences, 19, 2759–2777, 2022
https://doi.org/10.5194/bg-19-2759-2022
Research article
02 Jun 2022
Research article | 02 Jun 2022

A modern snapshot of the isotopic composition of lacustrine biogenic carbonates – records of seasonal water temperature variability

Inga Labuhn et al.

Data sets

Stable isotopes in water from Lake Locknesjön, Sweden collected between 2013 and 2018 Inga Labuhn, Franziska Tell, Ulrich von Grafenstein, Dan Hammarlund, Henning Kuhnert, and Bénédicte Minster https://doi.pangaea.de/10.1594/PANGAEA.942628

Stable isotopes in recent biogenic carbonates from Lake Locknesjön, Sweden collected in 2018 Inga Labuhn, Franziska Tell, Ulrich von Grafenstein, Dan Hammarlund, Henning Kuhnert, and Bénédicte Minster https://doi.pangaea.de/10.1594/PANGAEA.942627

Video supplement

Groundwater inflow causes sediment movement on the lake floor of Locknesjön, Sweden Inga Labuhn, Franziska Tell, Ulrich von Grafenstein, Dan Hammarlund, Henning Kuhnert, and Bénédicte Minster https://doi.org/10.5446/56815

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Short summary
This study presents the isotopic composition of recent biogenic carbonates from several lacustrine species which calcify during different times of the year. The authors demonstrate that when biological offsets are corrected, the dominant cause of differences between species is the seasonal variation in temperature-dependent fractionation of oxygen isotopes. Consequently, such carbonates from lake sediments can provide proxy records of seasonal water temperature changes in the past.
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