Global trends in the fluorescence characteristics and distribution of marine dissolved organic matter

Jørgensen, Louise von Gersdorff; Stedmon, Colin A.; Kragh, Theis; Markager, Stiig; Middelboe, Mathias; Søndergaard, Morten

doi:10.1016/j.marchem.2011.05.002

Cited by 325 publications

(369 citation statements)

References 51 publications

Supporting

Mentioning

313

Contrasting

Order By: Relevance

“…With the methods described above, the reference spectra were calculated for fulvic and humic acids (according to Hawes 1992) and for seven PARAFAC components identified by Jørgensen et al (2011). We investigated the spectral characteristics of different CDOM components, particularly in terms of their possible application in the satellite DOAS retrieval technique.…”

Section: Resultsmentioning

confidence: 99%

“…3c), fluorescence of component 2 is noticeably stronger than the others at wavelengths above 310 nm. This component was identified as trypthophan-like (Jørgensen et al 2011). Components 3 and 7 have very weak fluorescence, and component 5 did not produce any fluorescence signal.…”

Section: Resultsmentioning

confidence: 99%

“…For our study we used the data from a paper by Jørgensen et al (2011), who conducted a broad analysis of CDOM fluorescence on a global scale and identified seven components with the PARAFAC model, using split half analysis for validation (introduction to the PARAFAC technique and description of its application to CDOM fluorescence are presented in more detail in Stedmon and Bro (2008)). Jørgensen et al (2011) characterized these components by comparing their spectral characteristics to components identified in earlier studies and pure fluorophores.…”

Section: Excitation-emission Matrices Approachmentioning

confidence: 99%

“…Jørgensen et al (2011) characterized these components by comparing their spectral characteristics to components identified in earlier studies and pure fluorophores. Spectral characteristics (product of matrices c and d) of seven PARAFAC components are shown in Fig.…”

Section: Excitation-emission Matrices Approachmentioning

confidence: 99%

“…2. Jørgensen et al (2011) identified components 1 and 4 as humic-like DOM. Components 2, 3, 5 and 7 were characterized as amino acidlike DOM, which had spectra similar to phenylalanine, tryptophan and tyrosine.…”

Section: Excitation-emission Matrices Approachmentioning

confidence: 99%

See 4 more Smart Citations

Detecting CDOM Fluorescence Using High Spectrally Resolved Satellite Data: A Model Study

Wolanin

Розанов

Dinter

et al. 2015

Towards an Interdisciplinary Approach in Earth System Science

View full text Add to dashboard Cite

Absorption and fluorescence of CDOM are widely used to characterize its concentration and composition, both in situ and with remote sensing techniques. As fluorescence is an inelastic scattering process, it can potentially be observed in filling-in of Fraunhofer lines with the DOAS method in high spectrally resolved satellite data. Here, we perform a theoretical model study and preliminary DOAS retrieval on SCIAMACHY data in order to test the feasibility of such an approach. Our results show that retrieving CDOM fluorescence is difficult, due to its relatively weak signal in global oceans (in comparison to Raman scattering of clear water) and varying broad spectral features. Detailed studies of the synergistic use of narrow and broad fluorescence features, and an appropriate scheme to account for disturbance effects of Raman scattering, are needed for further investigating the retrieval of CDOM fluorescence.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Excitation-emission Matrices Approachmentioning

confidence: 99%

Section: Excitation-emission Matrices Approachmentioning

confidence: 99%

Section: Excitation-emission Matrices Approachmentioning

confidence: 99%

See 3 more Smart Citations

Detecting CDOM Fluorescence Using High Spectrally Resolved Satellite Data: A Model Study

Wolanin

Розанов

Dinter

et al. 2015

Towards an Interdisciplinary Approach in Earth System Science

View full text Add to dashboard Cite

show abstract

Absorption and fluorescence of dissolved organic matter in the waters of the Canadian Arctic Archipelago, Baffin Bay, and the Labrador Sea

Guéguen

Cuss

Cassels

et al. 2014

J. Geophys. Res. Oceans

View full text Add to dashboard Cite

The optical properties of dissolved organic matter (DOM) were investigated for the first time in the Canadian Arctic Archipelago (CAA), Baffin Bay (BB), and Labrador Sea (LS) as part of the International Polar Year Canada's Three Oceans project (C3O). The dynamics and composition of absorbing DOM (i.e., colored DOM, or CDOM) and fluorescent DOM (FDOM) were evaluated in several distinct water masses occupying the three regions: surface waters, Arctic outflow waters, West Greenland Intermediate waters (WGIW), upper Labrador Sea waters (uLSW), and Bottom Baffin Deep Water (BBDW). Four fluorescent components were identified by applying parallel factor analysis (PARAFAC) to 522 excitation emission matrix (EEM) spectra: three humic-like and one protein-like. The FDOM in surface waters of the CAA and BB differed considerably in character from those of the LS, with higher fluorescence intensity in the former. The fluorescence intensities of the two terrestrial humic-like components (C1 and C3) were linearly correlated with apparent oxygen utilization (AOU) in the CAA Arctic outflow and the WGIW whereas only humic-like C3 was significantly correlated with AOU in uLSW. These findings suggest that the humic-like components were produced in situ as organic matter was bio-oxidized. The slopes of the linear relationship between humic-like intensity and AOU were significantly greater in the WGIW relative to the Arctic outflow waters, which implies that FDOM in the Arctic-derived deeper layer was less prone to mineralization.

show abstract

Tracing the long-term microbial production of recalcitrant fluorescent dissolved organic matter in seawater

Jørgensen

Stedmon

Granskog

et al. 2014

Geophys. Res. Lett.

Self Cite

View full text Add to dashboard Cite

The majority of dissolved organic matter (DOM) in the ocean is resistant to microbial degradation, yet its formation remains poorly understood. The fluorescent fraction of DOM can be used to trace the formation of recalcitrant DOM (RDOM). A long-term (> 1 year) experiment revealed 27-52% removal of dissolved organic carbon and a nonlinear increase in RDOM fluorescence associated with microbial turnover of semilabile DOM. This fluorescence was also produced using glucose as the only initial carbon source, suggesting that degradation of prokaryote remnants contributes to RDOM. Our results indicate that the formation of a fluorescent RDOM component depends on the bioavailability of the substrate: the less labile, the larger the production of fluorescent RDOM relative to organic carbon remineralized. The anticipated increase in microbial carbon demand due to ocean warming can potentially force microbes to degrade less labile substrates, thereby increasing RDOM production and stimulating ocean carbon storage.

show abstract

Global trends in the fluorescence characteristics and distribution of marine dissolved organic matter

Cited by 325 publications

References 51 publications

Detecting CDOM Fluorescence Using High Spectrally Resolved Satellite Data: A Model Study

Detecting CDOM Fluorescence Using High Spectrally Resolved Satellite Data: A Model Study

Absorption and fluorescence of dissolved organic matter in the waters of the Canadian Arctic Archipelago, Baffin Bay, and the Labrador Sea

Tracing the long-term microbial production of recalcitrant fluorescent dissolved organic matter in seawater

Contact Info

Product

Resources

About