Plikk, Anna; Engels, Stefan; Fernández-Fernández, Maria; Katrantsiotis, Christos; Kylander, Malin E; Löwemark, Ludvig; Salonen, Sakari; Väliranta, Minna; Helmens, Karin (2025): Counts of chironomid head capsules for the Eemian sediment sequence retrieved from Sokli (Finland) in 2010 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.979951 (DOI registration in progress)
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Published: 2025-04-09
Abstract:
This dataset provides counts of chironomid head capsules for the Eemian sediment sequence retrieved from Sokli (Finland) in 2010. Counts per taxon are presented against both depth (m) and age (ka BP). The chironomid dataset provides information on Eemian lake ecosystem dynamics and was used to quantitatively reconstruct climate conditions (Plikk et al., 2019). A total of 79 samples from the Eemian sediment sequence were treated with warm KOH (10%) to de-flocculate the material and subsequently rinsed through a sieve with a 100-µm mesh. Chironomid head capsules (HCs) were hand-picked from the residue using a Bogorov sorting tray and mounted on permanent microscope slides using Euparal mounting medium. HCs were identified using Brooks et al. (2007). The uppermost three samples (1629–1600 cm) contained only a few chironomids and are excluded from the dataset presented here. Where the sum of head capsules was below 50, neighbouring samples have been amalgamated to ensure a representative count sum was reached. The final dataset presented here contains 73 samples.
All analyses were performed in the laboratories of Stockholm University, Sweden.
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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; 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
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:
Brooks, Steve J; Langdon, Peter G; Heiri, Oliver (2007): The Identification and Use of Palaearctic Chironomidae Larvae in Palaeoecology. Quaternary Research Association, Technical Guide, Quaternary Research Association, London, 10, 276 pp, https://edoc.unibas.ch/67001/
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
Funding:
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: 16.315 m * Maximum DEPTH, sediment/rock: 25.145 m
Event(s):
Comment:
Further funding was provided by Swedish Nuclear Fuel and Waste Management Company (SKB) and Bolin Centre for Climate Research (Stockholm University).
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
6716 data points
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