Photo-oxidation rates of dissolved organic carbon and sunlight in a tropical black-water system

Ora E.Johannsson, Marcio S.Ferreira, Scott Smith, Anne Crémazy, Chris M.Wood, and Adalberto L.Val. 2020. Effects of natural light and depth on rates of photo-oxidation of dissolved organic carbon in a major black-water river, the Rio Negro, Brazil. Science of the Total Environment.

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Collaborative research between the Amazonian Research Institute in Manaus and Canadian scientists at UBC and Wilfred Laurier has contributed to global carbon modeling through quantification of areal rates of photo-oxidation of dissolved organic carbon (DOC) and its relationship with sunlight in a tropical black-water system. They further discovered that partial photo-oxidation (fluorescence changes in the DOC) occurred to at least twice the depth of complete photo-oxidation to CO2 and absorbance changes.