Region: Oligotrophic Water

                                     tt17                  tt18             tt18/tt17         
                     Prod       mean       stdev        mean       stdev        mean       stdev
                  chlor_a     0.07060     0.01759     0.05526     0.00579     0.82623     0.19335
                  Rrs_412     0.01298     0.00158     0.01405     0.00080     1.09756     0.13463
                  Rrs_443     0.00972     0.00103     0.01059     0.00047     1.10081     0.11669
                  Rrs_488     0.00633     0.00045     0.00671     0.00017     1.06512     0.07111
                  Rrs_531     0.00225     0.00007     0.00230     0.00003     1.02422     0.02552
                  Rrs_547     0.00167     0.00003     0.00167     0.00003     1.00116     0.00964
                  Rrs_667     0.00014     0.00001     0.00014     0.00001     0.94937     0.08334
                  Rrs_678     0.00014     0.00001     0.00015     0.00001     1.06445     0.07625
                  aot_869     0.08165     0.00455     0.08170     0.00454     1.00062     0.00138
                 angstrom     0.66531     0.07593     0.66992     0.07589     1.00703     0.00104
                     nflh     0.00336     0.00121     0.00498     0.00067     1.65330     0.55265