Shala, Shyhrete; Helmens, Karin; Engels, Stefan; Kuhry, Peter; Kylander, Malin E; Luoto, Tomi P; Salonen, Sakari; Väliranta, Minna; Weckström, Jan (2025): Geochemical measurements of Holocene sediment sequence retrieved from Lake Loitsana, Finland [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.975102
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Published: 2025-02-13 • DOI registered: 2025-03-14
Abstract:
This dataset provides geochemical measurements for the Holocene sediment sequence retrieved from Lake Loitsana (Finland) in 2008. The data are presented as percentages (Corg, N), ‰ vs PDB (δ13Corg) and ‰ vs air (δ18O). All parameters are presented against both depth (cm) and age (cal yr. BP). Two age/depths models are presented: the first model represents the original age/depth model applied to the records (Shala et al., 2014; 2017) and the second age/depth model, which is the author-preferred version, presents updated age-estimates derived using the r package 'Bacon' (Blaauw and Christensen, 2011). The geochemical dataset provides information on Holocene lake ecosystem and catchment dynamics. A total of 144 samples from the Holocene sediment sequence were freeze-dried, ground and weighed into tin capsules for C/N-analysis. Additional material was taken from each sample for organic carbon (Corg) analysis. The material was weighed into silver capsules, treated with HCL (10%) and dried overnight before analysis. Concentrations were measured through combustion in a Carlo Erba NC2500 Elemental Analyzer at the Stable Isotope Lab at the Department of Geological Sciences, Stockholm University.
Keyword(s):
References:
Blaauw, Maarten; Christen, Andrés (2011): Flexible paleoclimate age-depth models using an autoregressive gamma process. Bayesian Analysis, 6(3), 457-474, https://doi.org/10.1214/11-BA618
Shala, Shyhrete; Helmens, Karin F; Luoto, Tomi P; Salonen, J Sakari; Väliranta, Minna; Weckström, Jan (2017): Comparison of quantitative Holocene temperature reconstructions using multiple proxies from a northern boreal lake. The Holocene, 27(11), 1745-1755, https://doi.org/10.1177/0959683617708442
Shala, Shyhrete; Helmens, Karin F; Luoto, Tomi P; Väliranta, Minna; Weckström, Jan; Salonen, J Sakari; Kuhry, Peter (2014): Evaluating environmental drivers of Holocene changes in water chemistry and aquatic biota composition at Lake Loitsana, NE Finland. Journal of Paleolimnology, https://doi.org/10.1007/s10933-014-9795-1
Funding:
Coverage:
Latitude: 67.804722 * Longitude: 29.282222
Date/Time Start: 2008-04-05T10:00:00 * Date/Time End: 2008-04-06T18:00:00
Minimum DEPTH, sediment/rock: 0.01 m * Maximum DEPTH, sediment/rock: 8.93 m
Event(s):
Comment:
Further funding was provided by SKB (Swedish Nuclear Fuel and Waste Management Company) and the Bolin Centre for Climate Research.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Engels, Stefan | Geocode | |
| 2 | Age model | Age model | ka | Engels, Stefan | Calculated, according to Shala et al. (2017) | |
| 3 | Age model | Age model | ka | Engels, Stefan | Calculated according to Blaauw and Christen (2011) | |
| 4 | Carbon, organic | C org | % | Engels, Stefan | Element analyser, Carlo Erba NC2500 | |
| 5 | Nitrogen | N | % | Engels, Stefan | Element analyser, Carlo Erba NC2500 | |
| 6 | Carbon/Nitrogen ratio | C/N | Engels, Stefan | Element analyser, Carlo Erba NC2500 | ||
| 7 | δ13C, organic carbon | δ13C Corg | ‰ PDB | Engels, Stefan | Element analyser, Carlo Erba NC2500 | |
| 8 | δ15N | δ15N | ‰ | Engels, Stefan | Element analyser, Carlo Erba NC2500 |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
987 data points