Plikk, Anna; Engels, Stefan; Fernández-Fernández, Maria; Katrantsiotis, Christos; Kylander, Malin E; Löwemark, Ludvig; Salonen, Sakari; Väliranta, Minna; Helmens, Karin (2025): Relative abundances and concentrations of individual n-alkanes, total Concentration of odd n-alkanes, average chain length and the carbon preference index obtained from the Eemian sediment sequence retrieved from Sokli (Finland) in 2010 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.979958
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Published: 2025-04-09 • DOI registered: 2025-05-08
Abstract:
This dataset provides the relative abundances (Rel_abn) and concentrations (Conc; presented as ug/g dry weight) of individual n-alkanes, as well as the Total Concentration of odd n-alkanes (ug/g dry weight), average chain length (ACL) and the carbon preference index (CPI). The dataset consists of 59 samples obtained from the Eemian sediment sequence retrieved from Sokli (Finland) in 2010. All parameters are presented against both depth (m) and age (ka BP). The dataset provides information on Eemian vegetation and ecosystem dynamics (Katrantsiotis et al., 2021). Lipid extracts were obtained for a total of 59 samples and separated into different fractions following the laboratory protocol presented in Katrantsiotis et al. (2021). The hydrocarbon fractions were then analyzed by Gas Chromatography-Mass Spectrometry (Shimadzu-QP2010 Ultra system) for n-alkane identification and quantification. CPI was calculated as: CPI = SUModd/SUMeven; (ACL) was determined as: ACL = SUM(n * Cn)/SUM(Cn), where Cn is the concentration (mg/g dry weight) of odd chain n-alkanes. The analyses were carried out at the Stable Isotope Laboratory, Stockholm University, Sweden. A previous version of this dataset can be found on the Bolin Climate Centre database (https://bolin.su.se/data/katrantsiotis-2021-sokli-1)
Keyword(s):
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; 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
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: 16.345 m * Maximum DEPTH, sediment/rock: 25.135 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):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Plikk, Anna | Geocode | |
| 2 | AGE | Age | ka BP | Plikk, Anna | Geocode | |
| 3 | n-Alkane C23 of total alkanes | C23 | % | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 4 | n-Alkane C24 of total alkanes | C24 | % | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 5 | n-Alkane C25 of total alkanes | C25 | % | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 6 | n-Alkane C26 of total alkanes | C26 | % | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 7 | n-Alkane C27 of total alkanes | C27 | % | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 8 | n-Alkane C28 of total alkanes | C28 | % | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 9 | n-Alkane C29 of total alkanes | C29 | % | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 10 | n-Alkane C30 of total alkanes | C30 | % | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 11 | n-Alkane C31 of total alkanes | C31 | % | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 12 | n-Alkane C23, per unit sediment mass | C23/sed | µg/g | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 13 | n-Alkane C24, per unit sediment mass | C24/sed | µg/g | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 14 | n-Alkane C25, per unit sediment mass | C25/sed | µg/g | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 15 | n-Alkane C26, per unit sediment mass | C26/sed | µg/g | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 16 | n-Alkane C27, per unit sediment mass | C27/sed | µg/g | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 17 | n-Alkane C28, per unit sediment mass | C28/sed | µg/g | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 18 | n-Alkane C29, per unit sediment mass | C29/sed | µg/g | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 19 | n-Alkane C30, per unit sediment mass | C30/sed | µg/g | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 20 | n-Alkane C31, per unit sediment mass | C31/sed | µg/g | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 21 | n-alkanes, total, per unit sediment mass | n-alkanes tot/sed | µg/g | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | |
| 22 | n-Alkanes, average chain length | ACL n-Alkane | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC | ||
| 23 | Carbon Preference Index, n-Alkanes | CPI n-Alkanes | Plikk, Anna | Shimadzu QP2010-Plus Mass Spectrometer interfaced with a Shimadzu 2010 GC |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1239 data points