NCL
                        CAM51_PD        CAM51_PI      difference     rel diff(%)
Sources (Tg/yr)         5330.019        5271.736          58.282           1.093
        emission        5330.019        5271.736          58.282           1.093
Sinks (Tg/yr)           5325.486        5267.275          58.210           1.093
         dry_dep        2551.446        2512.752          38.694           1.517
         wet_dep        2774.040        2754.523          19.517           0.704
Lifetime (days)            0.734           0.733           0.001           0.137
Burden (Tg)               10.710          10.578           0.132           1.228
    accumulation           0.821           0.806           0.014           1.727
          Aitken           0.002           0.002           0.000           2.035
          coarse           9.887           9.770           0.117           1.187