NCL
                        CAM51_PD        CAM51_PI      difference     rel diff(%)
Sources (Tg/yr)         4872.729        4911.354         -38.625          -0.793
        emission        4872.729        4911.354         -38.625          -0.793
Sinks (Tg/yr)           4865.629        4906.658         -41.029          -0.843
         dry_dep        2324.249        2319.343           4.906           0.211
         wet_dep        2541.380        2587.316         -45.936          -1.808
Lifetime (days)            0.729           0.733          -0.003          -0.448
Burden (Tg)                9.724           9.850          -0.126          -1.295
    accumulation           0.727           0.735          -0.008          -1.102
          Aitken           0.002           0.002          -0.000          -2.986
          coarse           8.995           9.113          -0.118          -1.310