Region: SIO

                                     at22                  at20             at20/at22         
                     Prod       mean       stdev        mean       stdev        mean       stdev
                  chlor_a     0.06882     0.02244     0.06747     0.02192     0.98082     0.00426
                  nLw_412     2.24380     0.38795     2.27075     0.38697     1.01246     0.00498
                  nLw_443     1.92398     0.29775     1.94090     0.29709     1.00906     0.00365
                  nLw_488     1.31239     0.11780     1.31833     0.11758     1.00457     0.00189
                  nLw_531     0.43759     0.03446     0.43835     0.03456     1.00172     0.00171
                  nLw_551     0.30272     0.02872     0.30293     0.02878     1.00066     0.00156
                  nLw_667     0.02005     0.00256     0.01946     0.00255     0.97041     0.00418
                  tau_869     0.09366     0.02362     0.09340     0.02359     0.99709     0.00081
                   eps_78     1.04285     0.02746     1.04410     0.02733     1.00120     0.00031
             angstrom_531     0.31880     0.12717     0.32432     0.12739     1.02031     0.01101