Figure 6: A) the ratio of predicted soluble Fe to total Fe and B) the ratio of predicted soluble Mn to total Mn in the hypolimnion during the Turnover deployment; C) the ratio of predicted soluble Fe to total Fe and D) the ratio of predicted soluble Mn to total Mn in the hypolimnion during the Oxygen On Deployment. Values were smoothed with a 10-hr moving average to remove noise. The dashed vertical lines represent the times when reservoir turnover occurred in panels A-B and when the HOx system was turned on in panels C-D. PLSR predictions that had negative values were set to zero when calculating ratios and any ratio value that was greater than 1 was set to 1. Note that the MUX was not collecting data from 11:00 EDT 31 May 2021 until 14:30 EDT 4 June 2021 due to technical issues.
Table 1. Summary of PLSR model statistics. n = number of observations. Tot. = total, Sol. = soluble. Epi = epilimnion, Hypo = hypolimnion. The hypolimnetic soluble Fe PLSR models from the Turnover Deployment had a poor model fit due to the extremely low concentration range.