This file includes the variable description of the data files published on Zenodo for the manuscript submitted to Biogeosciences titled 'Soil carbon loss in warmed subarctic grasslands is rapid and restricted to topsoil' 'stocks_data.csv'; includes the C stock data grassland: medium-term warmed (MTW) or long-term warmed (LTW) grassland sampling_year: year in which the soil samples were taken (2013 or 2018) SOC_stock_corr: Mass-corrected soil organic carbon stock SOC_stock: Uncorrected soil organic carbon stock C_perc: soil C % of the soil sample warming: degrees of soil warming (°C) ID: plot soil ID soil_layer: layer of soil sampled (0-10cm or 10-30cm) BD: bulk density (g cm-3) YOW: Years of warming; years the soil was warmed before sampling 'C_input_data.csv'; includes the C input data ID: plot soil ID grassland: medium-term warmed (MTW) or long-term warmed (LTW) grassland AMF_Cnew: C sequestered by AMF (ton C ha-1); data from Zhang et al., 2020 fine_root_C: fine root C in soil (ton C ha-1) AGB_C: aboveground biomass C on top of soil (ton C ha-1) warming: degrees of soil warming (°C) 'agg_data.csv'; includes the aggregate fractionation data ID: plot soil ID grassland: medium-term warmed (MTW) or long-term warmed (LTW) grassland warming: degrees of soil warming (°C) rel_mass: Relative aggregate fraction (%) C_perc: C amount in the aggregate fraction (%) abs_C_mass: absolute amount of C per fraction (g C 100 g-1 dw soil) 'DOC_data.csv'; includes the dissolved organic carbon leachate data (data from Edlinger, 2016) year: sampling year of the leachates grassland: medium-term warmed (MTW) or long-term warmed (LTW) grassland ID: plot soil ID warming: degrees of soil warming (°C) DOC: dissolved organic carbon (ppm) 'T_profile_LTW.csv'; includes temperature profile data from the long-term warmed grassland grassland: long-term warmed (LTW) grassland ID: plot soil ID depth: depth (cm) at which the the temperature was measured T_diff_from_10cm: temperature difference compared to 10cm depth (°C) 'fine_root_LTW.csv'; includes fine root density data from the long-term warmed grassland warming: degrees of soil warming (°C) fine_root_density: fine root density (mg roots cm-3) soil_layer: layer of soil sampled (0-10cm or 10-30cm) grassland: long-term warmed (LTW) grassland ID: plot soil ID