Butturini, AndreaEjarque, E.2013-09-252013-09-252013-09-061726-4170https://hdl.handle.net/2445/46332The analysis of the shape of excitation-emission matrices (EEMs) is a relevant tool for exploring the origin, transport and fate of dissolved organic matter (DOM) in aquatic ecosystems. Within this context, the decomposition of EEMs is acquiring a notable relevance. A simple mathematical algorithm that automatically deconvolves individual EEMs is described, creating new possibilities for the comparison of DOM fluorescence properties and EEMs that are very different from each other. A mixture model approach is adopted to decompose complex surfaces into sub-peaks. The laplacian operator and the Nelder-Mead optimisation algorithm are implemented to individuate and automatically locate potential peaks in the EEM landscape. The EEMs of a simple artificial mixture of fluorophores and DOM samples collected in a Mediterranean river are used to describe the model application and to illustrate a strategy that optimises the search for the optimal output.13 p.application/pdfengcc-by (c) Butturini, Andrea et al., 2013http://creativecommons.org/licenses/by/3.0/esEcologia aquàticaNutrients (Medi ambient)FluorescènciaAlgorismesAquatic ecologyNutrients (Ecology)FluorescenceAlgorithmsinfo:eu-repo/semantics/article6283022013-09-25info:eu-repo/semantics/openAccess