NCL
                     f.e13.F2000     f.e13.F2000      difference     rel diff(%)
Sources (Tg/yr)         5916.206        5899.236          16.970           0.287
        emission        5916.206        5899.236          16.970           0.287
Sinks (Tg/yr)           5907.521        5890.937          16.585           0.281
         dry_dep        1783.287        1779.283           4.003           0.224
         wet_dep        4124.234        4111.652          12.582           0.305
Lifetime (days)            1.128           1.143          -0.016          -1.376
Burden (Tg)               18.251          18.450          -0.199          -1.091
    accumulation           0.912           0.918          -0.006          -0.681
          Aitken           0.002           0.002          -0.000          -0.017
          coarse          17.337          17.530          -0.193          -1.113