NCL
                     b.e13.B1850     f.e13.F2000      difference     rel diff(%)
Sources (Tg/yr)         3931.020        3870.217          60.803           1.547
        emission        3931.020        3870.217          60.803           1.547
Sinks (Tg/yr)           3926.827        3865.379          61.448           1.565
         dry_dep        1145.405        1177.665         -32.261          -2.817
         wet_dep        2781.422        2687.714          93.708           3.369
Lifetime (days)            1.163           1.132           0.031           2.683
Burden (Tg)               12.515          11.989           0.526           4.206
    accumulation           0.610           0.582           0.027           4.497
          Aitken           0.001           0.001           0.000           3.092
          coarse          11.904          11.406           0.499           4.191