Region: global

                        st20                st21           st21/st20         
          Prod     mean     stdev      mean     stdev      mean     stdev
       nLw_412     1.696     0.079     1.610     0.080     0.949     0.003
       nLw_443     1.530     0.056     1.415     0.058     0.925     0.004
       nLw_490     1.147     0.025     1.072     0.026     0.934     0.003
       nLw_510     0.707     0.011     0.688     0.012     0.972     0.001
       nLw_555     0.364     0.007     0.378     0.007     1.039     0.001
       nLw_670     0.049     0.002     0.048     0.002     0.980     0.002
       chlor_a     0.276     0.031     0.353     0.040     1.278     0.015
        eps_78     1.038     0.007     1.038     0.007     1.000     0.000
       tau_865     0.128     0.005     0.129     0.005     1.001     0.000
  angstrom_510     0.334     0.044     0.334     0.044     0.999     0.001