Fig. 4: Summary of C and N densities in northern peatlands.

a Map and histogram of 1-m C density (kg C m−2) (n = 488). b Map and histogram of 1-m N density (kg N m−2) (n = 76). c Comparison of regional 1-m C and N densities (kg m-2). d Comparison of C and N densities (g cm−3). The regional C and N densities are calculated based on the dataset of northern peatlands66.