Journal article
The molecular fingerprint of fluorescent natural organic matter offers insight into biogeochemical sources and diagenetic state
Section for Oceans and Arctic, National Institute of Aquatic Resources, Technical University of Denmark1
National Institute of Aquatic Resources, Technical University of Denmark2
Chalmers University of Technology3
Simula Research Laboratory4
Alfred Wegener Institute - Helmholtz Centre for Polar and Marine Research5
Helmholtz Zentrum München - German Research Center for Environmental Health6
Investigating the biogeochemistry of dissolved organic matter (DOM) requires the synthesis of data from several complementary analytical techniques. In contrast to subjective post-hoc correlation analysis, a robust integration requires data fusion, capable of simultaneously decomposing data from multiple instruments while identifying linked and unrelated signals.
Here, Advanced Coupled Matrix and Tensor Factorization (ACMTF) was used to identify the molecular fingerprint of DOM fluorescence fractions in Arctic fjords. ACMTF explained 99.84 % of the variability with six fully shared components. Individual molecular formulas were linked to multiple fluorescence components and vice versa.
Molecular fingerprints differed in diversity and oceanographic patterns, suggesting a link to the biogeochemical sources and diagenetic state of DOM. The fingerprints obtained through ACMTF were more specific compared to traditional correlation analysis and yielded greater compositional insight. Multivariate data fusion aligns extremely complex, heterogeneous DOM datasets, and thus facilitates a more holistic understanding of DOM biogeochemistry.
Language: | English |
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Publisher: | American Chemical Society |
Year: | 2018 |
Pages: | 14188-14197 |
ISSN: | 15206882 , 00032700 and 15204782 |
Types: | Journal article |
DOI: | 10.1021/acs.analchem.8b02863 |
ORCIDs: | Wünsch, Urban , 0000-0001-5715-3604 and Stedmon, Colin Andrew |