NCL
                              PD              PI      difference     rel diff(%)
Sources (Tg/yr)         3597.040        3625.754         -28.714          -0.798
        emission        3597.040        3625.754         -28.714          -0.798
Sinks (Tg/yr)           3585.500        3615.337         -29.837          -0.832
         dry_dep        1975.168        1987.075         -11.907          -0.603
         wet_dep        1610.332        1628.262         -17.930          -1.113
Lifetime (days)            0.884           0.881           0.003           0.304
Burden (Tg)                8.684           8.730          -0.046          -0.526
    accumulation           0.641           0.643          -0.003          -0.391
          Aitken           0.002           0.002           0.000           0.114
          coarse           8.042           8.085          -0.043          -0.536