Fig. 2. Long-term linear rates of change in DOC concentration (dark green bars), compared with rates of change in modeled DOC (light orange bars), and counterfactual alternatives (other colored bars) where the effect of one or two variables in the model has been held constant.

DOC, measured DOC; FULL_MODEL, DOC modeled using all parameters; DEP, FLOW, and TEMP refer to the inclusion of deposition, discharge, and temperature as dynamic variables in the counterfactual models. Error bars represent the SE of the linear trend. Discharge is not a significant predictor of DOC in Storgama, and its effects are therefore ignored.