NCL
                     f.e13.F2000     f.e13.F2000      difference     rel diff(%)
Sources (Tg/yr)         6046.204        5859.149         187.055           3.094
        emission        6046.204        5859.149         187.055           3.094
Sinks (Tg/yr)           6033.995        5850.314         183.681           3.044
         dry_dep        1814.096        1767.428          46.668           2.573
         wet_dep        4219.899        4082.887         137.012           3.247
Lifetime (days)            1.128           1.122           0.005           0.472
Burden (Tg)               18.642          17.990           0.653           3.501
    accumulation           0.921           0.892           0.029           3.180
          Aitken           0.002           0.002           0.000           3.810
          coarse          17.719          17.096           0.623           3.516