Resolving the variability in dissolved organic matter fluorescence in a temperate estuary and its catchment using PARAFAC analysis
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Abstract
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…
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Topics
Keywords
- Estuary
- Dissolved organic carbon
- Fluorescence
- Environmental chemistry
- Environmental science
- TRACER
- Temperate climate
- Organic matter
UN Sustainable Development Goals
- Life below water
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