Fig. 3

Correlation plots for TN and TP in testing. Seasonal correlation plots for TN and TP for the testing data sets. Horizontal axes represent the observations and vertical axes represent the predicted values. Ticks labelled in black are box-cox transformed values and ticks in blue are original values in ppm. Pearson coefficients (r) and RMSE(\({{\rm{RMSE}}}_{te}^{bc}\), \({{\rm{RMSE}}}_{te}^{or}\)) are given in the upper-left corner box.