10.1594/PANGAEA.974304Laurent, MélissaMélissaLaurent0000-0002-2347-479XAlfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, PotsdamLück, MatthiasMatthiasLückLeibniz Centre for Agricultural Landscape ResearchTreat, Claire CClaire CTreat0000-0002-1225-8178Center for Landscape Research in Sustainable Agricultural FuturesPANGAEA2025LaplandPalsaPeatlandSoil parametersEvent labelLatitude of eventLongitude of eventPermafrost extentSiteState of permafrostActive layer depthSample typeVegetation typePositionMajor vegetationDEPTH, sediment/rockCarbon, organic, totalCarbon, total/Nitrogen, total ratiopHConductivity, electricalCarbon, organic, dissolvedSoil water contentHumification indexRatioSIPRE corerWater sampleElement analyzer, vario Cube SoliTOCMultimeter, WTW, Multilab 540Handheld meter, WTW, Cond 340iTotal organic carbon analyzer (TOC-VCPH), ShimadzuFourier Transform Infrared (FTIR) spectrometer, Bio-Rad Laboratories, Bio-Rad FTS 135 coupled to KBr-techniqueFN-Land_2023_LaplandAWI Arctic Land ExpeditionPermafrost Research (AWI_Perma)2023-04-01T00:00:00Dataset10.5194/bg-22-7881-202510.1594/PANGAEA.974302159 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalIn this dataset, we present the initial soil parameters of two cores from a palsa and a peatland in Lapland, as well as hydro-chemical parameters of thermokarst water used for inoculating par of the mesocosms. We measured sedimentary and hydro-chemical parameters, along with the humification index obtained through FTIR analysis. The replicate cores were incubated under different water treatments to identify the effect of hydrological conditions on carbon mineralization.21.0791666721.0791666768.87725168.87777778Kilpisjarvi, Finland