This package contains the data used in the research article: "Partial cutting of a boreal nutrient-rich peatland forest causes radically less on-site CO2 emissions than clear-cutting" published in Agricultural and Forest Meteorology. LAI_data.xlsx - Contains Leaf Area Index data and their standard deviations for all the measured areas WTL_data.csv - Contains the mean water table level data for pre-harvest, partial harvest and clearcut areas. Lettosuo_2010-2015_Section_A_fluxes.csv - Contains the pre-harvest (2010-2015) carbon flux data for Section A. Lettosuo_2010-2015_Section_BCD_fluxes.csv - Contains the pre-harvest carbon flux data for Section BCD. Lettosuo_2016-2021_Section_AB_(partialcut).csv - Contains the carbon flux data for the partial cut area (2016-2021, Section AB). Lettosuo_2016-2021_Section_D_(Clearcut).csv - Contains the carbon flux data for the clear-cut area (2016-2021, Section D) The carbon flux data files contain the following columns: Gapfilled PAR - Gapfilled photsynthetically active radiation Gapfilled air temperature - Gapfilled air temperature Measured NEE - Filtered NEE data Modelled TER - Modelled total ecosystem respiration Modelled GPP - Modelled gross primary production Modelled NEE - Modelled NEE calculated from the modelled TER and GPP Gapfilled NEE - A combination of measured and modelled NEE. Gaps in the measured data are filled with modelled NEE Modelling uncertainty - Uncertainty of the modelled NEE Measurement uncertainty - An estimation of the uncertainty of the measured NEE