Files: HBL_WSL_melt_period_CH4_sum_2011_2021.csv -Contains total melt period posterior CH4 emissions in the Hudson Bay lowlands and Western Siberian lowlands for the years 2011-2021. The unit of the sum is in Gg CH4. Grid-based_melt_period_CH4_sum_2011_2021_all.csv -Contains total melt period posterior CH4 emissions in the four permafrost zones defined with the grid-based method for the years 2011-2021. The unit of the sum is in Tg CH4. Region-based_melt_period_CH4_sum_2011_2021_all.csv -Contains total melt period posterior CH4 emissions in the four permafrost zones defined with the region-based method for the years 2011-2021. The unit of the sum is in Tg CH4. len_season_per_gridpoint_2011-2021.nc -Contains the grid-based length of the melt period in days (1°x1°) for the years 2011-2021. end_season_per_gridpoint_2011-2021.nc -Contains the grid-based end date of the melt period (1°x1°) for the years 2011-2021. start_season_per_gridpoint_2011-2021.nc -Contains the grid-based start date of the melt period (1°x1°) for the years 2011-2021. Region-based_melt_period_length.csv -Contains the region-based length, start and end dates of the melt period for the four permafrost zones for the years 2011-2021 as well as the average.