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Plikk, Anna; Engels, Stefan; Fernández-Fernández, Maria; Katrantsiotis, Christos; Kylander, Malin E; Löwemark, Ludvig; Salonen, Sakari; Väliranta, Minna; Helmens, Karin (2025): Biogenic silica (BSi) content for the Eemian sediment sequence retrieved from Sokli (Finland) in 2010 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.979950 (DOI registration in progress)

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Published: 2025-04-09

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Abstract:
The dataset provides quantifications of biogenic silica (BSi) content for the Eemian sediment sequence retrieved from Sokli (Finland) in 2010. Amounts of BSi are presented as percentage of weight and are presented against both depth (m) and age (ka BP). The BSi dataset provides information on Eemian lake ecosystem productivity (Plikk et al., 2016). A set of 898 1 cc sub-samples from the Eemian diatom gyttja has been analyzed using Fourier Transformed Infra Red Spectrometry (FTIRS) at the Department of Ecology and Environmental Science, Umeå University, Sweden, following Rosén et al. (2010). The analysis was performed on freeze-dried homogenized samples using a VERTEX 70 FTIR Spectrometer (Bruker Optics). All samples were pretreated in order to minimize the spectral variation not related to the sample properties. BSi content was quantified using an independent calibration model for BSi (Meyer-Jacob et al. 2014). Thirty samples were selected for conventional measurements of BSi content and used for validation of the model. The conventional measurements were made at the Alfred Wegener Institute for Polar and Marine Research (Bremerhaven, Germany).
Keyword(s):
Chironomids; C/N; Diatom; Eemian; Finland; Itrax; loss on ignition; macrobotanical remains; MIS 5e; n-alkanes; non-pollen palynomorphs; Pollen; Sokli; stabe isotopes
Related to:
Helmens, Karin F; Salonen, J Sakari; Plikk, Anna; Engels, Stefan; Väliranta, Minna; Kylander, Malin E; Brendryen, J; Renssen, Hans (2015): Major cooling intersecting peak Eemian Interglacial warmth in northern Europe. Quaternary Science Reviews, 122, 293-299, https://doi.org/10.1016/j.quascirev.2015.05.018
Katrantsiotis, Christos; Norström, Elin; Smittenberg, Rienk H; Salonen, J Sakari; Plikk, Anna; Helmens, Karin (2021): Seasonal variability in temperature trends and atmospheric circulation systems during the Eemian (Last Interglacial) based on n-alkanes hydrogen isotopes from Northern Finland. Quaternary Science Reviews, 273, 107250, https://doi.org/10.1016/j.quascirev.2021.107250
Kylander, Malin E; Plikk, Anna; Rydberg, Johan; Löwemark, Ludvig; Salonen, J Sakari; Fernández-Fernández, Maria; Helmens, Karin (2018): New insights from XRF core scanning data into boreal lake ontogeny during the Eemian (Marine Isotope Stage 5e) at Sokli, northeast Finland. Quaternary Research, 89(1), 352-364, https://doi.org/10.1017/qua.2017.84
Plikk, Anna (2018): The Eemian Interglacial at Sokli, northern Finland [dissertation]. Stockholm University
Plikk, Anna; Engels, Stefan; Luoto, Tomi P; Nazarova, Larisa B; Salonen, J Sakari; Helmens, Karin F (2019): Chironomid-based temperature reconstruction for the Eemian Interglacial (MIS 5e) at Sokli, northeast Finland. Journal of Paleolimnology, 61(3), 355-371, https://doi.org/10.1007/s10933-018-00064-y
Plikk, Anna; Risberg, Jan; Helmens, Karin F (2021): Diatom assemblages from an Eemian palaeolake in Northern Europe with morphological observations of rare Aulacoseira sp. resting spores. Diatom Research, 36(4), 313-321, https://doi.org/10.1080/0269249X.2021.2001381
Salonen, J Sakari; Helmens, Karin F; Brendryen, Jo; Kuosmanen, Niina; Väliranta, Minna; Goring, Simon J; Korpela, Mikko; Kylander, Malin E; Philip, Annemarie; Plikk, Anna; Renssen, Hans; Luoto, Miska (2018): Abrupt high-latitude climate events and decoupled seasonal trends during the Eemian. Nature Communications, 9(1), 2851, https://doi.org/10.1038/s41467-018-05314-1
References:
Meyer-Jacob, Carsten; Vogel, Hendrik; Boxberg, Florian; Rosén, Peter; Weber, Michael E; Bindler, Richard (2014): Independent measurement of biogenic silica in sediments by FTIR spectroscopy and PLS regression. Journal of Paleolimnology, 52(3), 245-255, https://doi.org/10.1007/s10933-014-9791-5
Plikk, Anna; Helmens, Karin F; Fernández-Fernández, Maria; Kylander, Malin E; Löwemark, Ludvig; Risberg, Jan; Salonen, J Sakari; Väliranta, Minna; Weckström, Jan (2016): Development of an Eemian (MIS 5e) Interglacial palaeolake at Sokli (N Finland) inferred using multiple proxies. Palaeogeography, Palaeoclimatology, Palaeoecology, 463, 11-26, https://doi.org/10.1016/j.palaeo.2016.09.008
Funding:
Academy of Finland, grant/award no. 1278692
Academy of Finland, grant/award no. 1310649
Coverage:
Latitude: 67.800278 * Longitude: 29.300278
Date/Time Start: 2010-02-15T08:00:00 * Date/Time End: 2010-02-15T17:00:00
Minimum DEPTH, sediment/rock: 15.9750 m * Maximum DEPTH, sediment/rock: 25.4500 m
Event(s):
Sokli_2010/4 * Latitude: 67.800278 * Longitude: 29.300278 * Date/Time Start: 2010-02-15T08:00:00 * Date/Time End: 2010-02-15T17:00:00 * Elevation: 220.0 m * Method/Device: Rotary-percussion drill (RPDRILL)
Comment:
Further funding was provided by Swedish Nuclear Fuel and Waste Management Company (SKB) and Bolin Centre for Climate Research (Stockholm University).
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DEPTH, sediment/rockDepth sedmPlikk, AnnaGeocode
2AGEAgeka BPPlikk, AnnaGeocode
3Biogenic silicabSiO2%Plikk, AnnaFourier transform infrared spectroscopy (FTIR), Burker OPTIK GmbH, Vertex 70conventiol
4Biogenic silicabSiO2%Plikk, AnnaFourier transform infrared spectroscopy (FTIR), Burker OPTIK GmbH, Vertex 70FTIRS
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
928 data points

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