Fluorescence spectroscopy of coastal and marine waters

Sierra, Maria Marta de Souza; Donard, O.F.X.; Lamotte, Michel; Belin, Claude; Ewald, M.

doi:10.1016/0304-4203(94)90104-x

Cited by 173 publications

(69 citation statements)

References 24 publications

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“…DOM is commonly defined as that OM which passes through a glass fibre filter (GF/F; 0Ð7 µm) (e.g. De Souza Sierra et al, 1994;Stedmon et al, 2003;Yamashita and Tanoue, 2003). Samples were filtered onsite using a glass filtration apparatus that had been rinsed with 2N HCl and deionized water and fitted with a pre-combusted GF/F filter paper.…”

Section: Samplingmentioning

confidence: 99%

Using synchronous fluorescence spectroscopy and principal components analysis to monitor dissolved organic matter dynamics in a glacier system

Barker

Sharp

Turner

2009

Hydrological Processes

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Abstract:The molecular characteristics of dissolved organic matter (DOM) reflect both its source material and its biogeochemical history. In glacial systems, DOM characteristics might be expected to change over the course of a melt season as changes in the glacier drainage system cause the mobilization of DOM from different OM pools. To test this hypothesis we used Principal Components Analysis (PCA) of synchronous fluorescence spectra to detect and describe changes in the DOM in meltwater from a glacier system in the Coast Mountains of northern British Columbia, Canada. For most of the melt season, the dominant component of subglacially routed meltwater DOM is characterized by a tyrosine-like fluorophore. This DOM component is most likely derived from supraglacial snowmelt. During periods of high discharge, a second component of DOM is present which is humic in character and similar to DOM sampled from a nearby non-glacial stream. This DOM component is inferred to be derived from a moss-covered soil environment that has been glacially overrun. It is probably entrained into glacial melt waters when the supraglacial meltwater flux exceeds the capacity of the principal subglacial drainage channels and water floods areas of the glacier bed that are normally isolated from the subglacial drainage system. Another source of DOM also appears to be mobilized during periods of high air temperatures. It is characterized by both humic and proteinaceous fluorophores and may be derived from the drainage of supraglacial cryoconite holes.

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Section: Samplingmentioning

confidence: 99%

Using synchronous fluorescence spectroscopy and principal components analysis to monitor dissolved organic matter dynamics in a glacier system

Barker

Sharp

Turner

2009

Hydrological Processes

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“…In coastal waters, especially, attentive studies have been conducted to elucidate the expanse of the terrestrial humic substances in the estuary [De Souza Sierra et al, 1994;Chen et al, 2002;Conmy et al, 2004]. In the open ocean, meanwhile, relatively limited measurements of the fluorescence intensity of humic substances have been carried out so far.…”

Section: Introductionmentioning

confidence: 99%

Relationship between the seasonal change in fluorescent dissolved organic matter and mixed layer depth in the subtropical western North Pacific

Omori

Hama

Ishii³

et al. 2010

J. Geophys. Res.

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[1] Spatial and temporal distributions of marine humic-like fluorescent dissolved organic matter (FDOM M ) were determined in the subtropical western North Pacific to evaluate the controlling factors of FDOM M behaviors. The observations were conducted at 4 stations (15-30°N) along 137°E in a subtropical area between January 2006 and April 2007. The florescence intensity of FDOM M was low (0.14-0.25 quinine sulfate units (QSU)) in the surface layer probably due to photodegradation, and increased with depth (0.90-1.10 QSU at 1000 m), irrespective of season and station. In the surface layer, the thickness of the water mass with low fluorescence intensity (<0.3 QSU) showed the seasonal change by being deeper in winter and shallower in summer, depending on the mixed layer depth (MLD). The average fluorescence intensity within the mixed layer also varied seasonally at midlatitudes; the intensity in summer was 40.8-53.8% of that in winter. Since the MLD was very much shallower in summer than in winter, FDOM M in the mixed layer would be kept within a shallow depth during the summer where intensive photodegradation could occur. The concentration of total organic carbon (TOC) was at its maximum at the water surface and decreased with depth, being adverse to FDOM M . Thus, the ratio of fluorescence intensity to TOC concentration was lowest (0.002-0.003) in surface water, which implies that FDOM M is not quantitatively important to the dissolved organic carbon pool. However, considering the possible difference in the stabilities of FDOM M against photochemical and microbial degradation, it is conceivable that photobleached FDOM M is one of the important organic groups constituting marine dissolved organic matter.Citation: Omori, Y., T. Hama, M. Ishii, and S. Saito (2010), Relationship between the seasonal change in fluorescent dissolved organic matter and mixed layer depth in the subtropical western North Pacific,

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“…Among the techniques, the measurement of absorption and fluorescence properties and their correlation with DOC have been demonstrated to be suitable tools for getting useful information on chemical and photochemical processes occurring in the system (Coble et al, 1990;Chen and Bada, 1992;Mopper and Schultz, 1993;De Souza Sierra et al, 1994;Coble, 1996;Ferrari et al, 1996). Further, field data have also been used to validate remote sensing estimations of the optical parameters of the sea (Carder et al, 1989;Blough and Green, 1995;Hoge et al, 1995;Vodacek et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

DOC, absorption and fluorescence properties of estuarine and coastal waters of the Northern Tyrrhenian Sea

Seritti¹,

Russo²,

Nannicini³

et al. 1998

Chemical Speciation & Bioavailability

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Fluorescence spectroscopy of coastal and marine waters

Cited by 173 publications

References 24 publications

Using synchronous fluorescence spectroscopy and principal components analysis to monitor dissolved organic matter dynamics in a glacier system

Using synchronous fluorescence spectroscopy and principal components analysis to monitor dissolved organic matter dynamics in a glacier system

Relationship between the seasonal change in fluorescent dissolved organic matter and mixed layer depth in the subtropical western North Pacific

DOC, absorption and fluorescence properties of estuarine and coastal waters of the Northern Tyrrhenian Sea

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