[{"name":"katrantsiotis-2021-sokli-1","title":"Organic geochemical data including leaf wax hydrogen isotopes from Sokli, Northern Finland","summary":"The dataset contains bulk geochemical data (TOC, TN, bulk \u03b4\u00b9\u00b3C and \u03b4\u00b9\u2075N), leaf wax concentrations and their hydrogen isotope composition, from the Eemian (penultimate interglacial) paleolake sediment core at Sokli, Northern Finland.\r\n\r\nThe data are used to interpret past climate conditions in the sub-arctic region of northern Fennoscandia , particularly seasonal changes in temperature, which relates to atmospheric circulation patterns, in response to orbital forcing.\r\n\r\nThe data covers the period from 131,000\u2060\u200a\u2013\u200a\u2060118,000 years before present.\r\n","citations":"Katrantsiotis C, Norstr\u00f6m E, Smittenberg RH, Salonen JS, Plikk A, Helmens K (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 Review (accepted).","comments":"Please cite the accompanying paper by Katrantsiotis et al. when using this dataset.\r\n\r\nThis dataset was compiled for a study that aims to understand seasonal evolution of sub-arctic temperature trends and related changes in the atmospheric circulation systems during the last interglacial. The analysis was performed in a sediment core retrieved from Sokli in 2010. The geochemical analyses were performed in 2018\u2060\u200a\u2013\u200a\u20602019. TOC, TN and \u03b4\u00b9\u00b3Corg were quantified with a Carlo Erba NC2500 elemental analyzer coupled with a Finnigan MAT Delta V mass spectrometer at the Stable Isotope Laboratory, Stockholm University. Total lipid extracts were obtained via sonication of freeze-dried and powdered sediment samples at the department of Geological Sciences, Stockholm University. The hydrocarbon fractions were analyzed by gas chromatography\u2013mass spectrometry (Shimadzu-QP2010 Ultra system), for n-alkane identification and quantification. The stable hydrogen isotopic composition (deuterium\/hydrogen ratio) of n-alkanes (\u03b4D) was analyzed using a Thermo gas chromatography-isotope ratio mass spectrometry (GC-IRMS) system at the department of Environmental Sciences, Stockholm University.\r\n\r\nOur study complements the scarcely available Eemian proxy data from high-latitude continental regions and contributes to a better understanding of sub-arctic seasonal signal in temperatures trends and the related atmospheric drivers, which have remained poorly constrained for this interglacial period.\r\n\r\nWe acknowledge Anna H\u00e4gglund in particular for assistance while operating the GC-IRMS, Klara Hajnal with the assistance of extracting n-alkanes and the preparations of samples for bulk isotope analysis and Heike Siegmund for the assistance of bulk isotope analysis at the Stable Isotope Laboratory at Stockholm University.\r\n\r\nRoles of the responsible scientists: Christos Katrantsiotis (data creator), Rienk Smittenberg and Elin Norstr\u00f6m (PI).","category":"Lacustrine","subcategory":"Sediment cores","keywords":"Eemian; MIS 5e; Last Interglacial; Biomarkers; Hydrogen isotopes; Climate variability; Seasonality changes; Finland","scientist":"Christos Katrantsiotis, Rienk Smittenberg, Elin Norstr\u00f6m","firstname":"Rienk","lastname":"Smittenberg","address":"Department of Geological Sciences; Stockholm University\r\n","postalcode":"SE-106 91","city":"Stockholm","province":"","country":"Sweden","parameters":"Earth science > Climate indicators > Paleoclimate indicators > Ocean\/lake records > Isotopes","location":"Continent > Europe > Northern Europe > Scandinavia > Finland","progress":"Completed","language":"English","project":"This research was primarily financed by the Bolin Centre for Climate Research, Stockholm University. KFH further acknowledges funding from the Swedish Nuclear Fuel and Waste Management Company (SKB); JSS from the Academy of Finland (project 1310649).","publisher":"Bolin Centre Database","version":"1","constrains":"","access":""}]