NCL
                     b.e13.B1850     f.e13.F2000      difference     rel diff(%)
Sources (Tg/yr)         4179.072        3794.407         384.665           9.205
        emission        4179.072        3794.407         384.665           9.205
Sinks (Tg/yr)           4171.052        3792.344         378.708           9.079
         dry_dep        1261.996        1128.647         133.349          10.566
         wet_dep        2909.055        2663.697         245.359           8.434
Lifetime (days)            1.140           1.137           0.002           0.205
Burden (Tg)               13.024          11.818           1.207           9.266
    accumulation           0.643           0.587           0.056           8.781
          Aitken           0.002           0.001           0.000          11.272
          coarse          12.380          11.230           1.150           9.291