SOA
                              PD              PI      difference     rel diff(%)
Sources (Tg/yr)          125.314         114.457          10.858           8.664
    condensation         125.314         114.457          10.858           8.664
Sinks (Tg/yr)            123.256         112.477          10.779           8.745
         dry_dep          18.543          15.772           2.771          14.943
         wet_dep         104.713          96.705           8.008           7.648
Lifetime (days)            6.077           5.973           0.104           1.715
Burden (Tg)                2.052           1.840           0.212          10.310
    accumulation           2.033           1.827           0.206          10.156
          Aitken           0.019           0.014           0.005          26.864