This dataset provides Loss-on-ignition (LOI) data for the Holocene sediment sequence retrieved from Lake Loitsana (Finland) in 2008. LOI values (%) are presented against both depth (m) and age (cal ka 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 LOI dataset was used to provide information on Holocene landscape dynamics at lake Loitsana. A total of 153 samples were analyzed for LOI. Subsamples of 1 cm³ were dried in a 105 °C oven for 24 hrs before being placed in a furnace at 550 °C for 4 hrs and at 950 °C for 5 hours. Loss-on-ignition was calculated by comparing the dry weight of the samples before and after combustion at 550 °C following Heiri et al. (2001) and results are expressed as a percentage. The analyses were performed in the laboratories of Stockholm University, Sweden.

Further funding was provided by SKB (Swedish Nuclear Fuel and Waste Management Company) and the Bolin Centre for Climate Research.