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Resolving the variability in dissolved organic matter fluorescence in a temperate estuary and its catchment using PARAFAC analysis
Author(s) -
Stedmon Colin A.,
Markager Stiig
Publication year - 2005
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.2005.50.2.0686
Subject(s) - estuary , dissolved organic carbon , fluorescence , environmental chemistry , environmental science , tracer , temperate climate , organic matter , drainage basin , fluorescence spectroscopy , sampling (signal processing) , fraction (chemistry) , fluorescence spectrometry , chemistry , ecology , oceanography , geology , biology , chromatography , geography , physics , cartography , filter (signal processing) , quantum mechanics , computer science , nuclear physics , computer vision
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.