NCL
                              PD              PI      difference     rel diff(%)
Sources (Tg/yr)         3346.353        3348.880          -2.527          -0.076
        emission        3346.353        3348.880          -2.527          -0.076
Sinks (Tg/yr)           3338.405        3337.672           0.733           0.022
         dry_dep        1860.370        1855.849           4.521           0.243
         wet_dep        1478.035        1481.822          -3.787          -0.256
Lifetime (days)            0.905           0.900           0.005           0.562
Burden (Tg)                8.274           8.226           0.048           0.584
    accumulation           0.604           0.597           0.007           1.153
          Aitken           0.001           0.001          -0.000          -3.540
          coarse           7.669           7.627           0.041           0.540