2005/03/01 by Colin A. Stedmon, Stiig Markager · 1 citation
Earth and Planetary Sciences · Environmental Science · #Marine and coastal ecosystems #Water Quality Monitoring and Analysis #Air Quality Monitoring and Forecasting
paper · pdf · doi:10.4319/lo.2005.50.2.0686
Excitation emission matrix fluorescence spectroscopy combined with PARAFAC analysis provides a fast and effective method of characterizing the fluorescent fraction of dissolved organic matter (DOM). Fluorescence measurements can be used as a tracer for quantitative and qualitative changes occurring in the DOM pool as a whole. An earlier study found that the fluorescence signal could be modeled by five fractions. This study presents an analysis on a considerably larger data set (>1,200 samples) resulting from a 1-yr sampling program in Horsens Estuary, Denmark. Eight fluorescent fractions were identified. Four biogenic terrestrial, two anthropogenic, and two protein-like fractions were identified. Analysis of covariation between the components identified source-specific fractions and the presence of common factors controlling the composition of terrestrial DOM exported from different catchments.