BC
                              PD              PI      difference     rel diff(%)
Sources (Tg/yr)            7.767           3.085           4.681          60.277
        emission           7.767           3.085           4.681          60.277
Sinks (Tg/yr)              7.726           3.070           4.656          60.264
         dry_dep           1.898           0.855           1.044          54.982
         wet_dep           5.828           2.215           3.612          61.985
Lifetime (days)            7.864           9.067          -1.204         -15.305
Burden (Tg)                0.166           0.076           0.090          54.182
    accumulation           0.122           0.049           0.073          59.884
  primary_carbon           0.045           0.027           0.017          38.600