If you are looking for a specific or a different scientific paper by an author named Naden regarding sulfur, please let me know. I can also help you:
The model described by Naden et al. follows a two-phase process for simulating DOC concentrations at a catchment outlet:
: Reductions in sulfate deposition have been linked to shifts in the nature of Natural Organic Matter (NOM) , making it more hydrophobic and colored in certain "brown water" environments.