Region: SIO

                                     tt18                  tt19             tt19/tt18         
                     Prod       mean       stdev        mean       stdev        mean       stdev
                  chlor_a     0.06348     0.02281     0.06309     0.02344     0.98997     0.03077
                  Rrs_412     0.01376     0.00234     0.01373     0.00234     0.99783     0.00380
                  Rrs_443     0.01080     0.00155     0.01077     0.00155     0.99789     0.00370
                  Rrs_488     0.00688     0.00059     0.00686     0.00058     0.99803     0.00367
                  Rrs_531     0.00243     0.00013     0.00242     0.00013     0.99488     0.01075
                  Rrs_547     0.00178     0.00012     0.00177     0.00012     0.99344     0.01528
                  Rrs_667     0.00014     0.00003     0.00014     0.00003     0.97677     0.04962
                  Rrs_678     0.00016     0.00003     0.00016     0.00003     0.98779     0.03008
                  aot_869     0.07234     0.01664     0.07520     0.01707     1.04092     0.03746
                 angstrom     0.66649     0.21364     0.69184     0.21629     1.04313     0.06774
                     nflh     0.00512     0.00135     0.00522     0.00131     1.02395     0.04385