Abstract
Dissolved organic matter (DOM) plays a significant role in freshwater and marine aquatic ecosystems including its effects on nutrients and carbon cycling and trace metal and contaminant availability. The colored fraction of DOM, CDOM, directly affects the quantity and spectral quality of available light, thereby impacting both primary production and UV exposure in aquatic ecosystems. Measuring the DOM absorption coefficient in situ is difficult because it requires prefiltration of the sample. From measurements made in inland, riverine, estuarine and coastal environments, we show that using the WETStar fluorometer (WET Labs), good estimates of dissolved absorption can be obtained from DOM fluorescence (DOM-FL) measured in situ on unfiltered samples. DOM-FL measured with the in situ fluorometer compare very well to values obtained on filtered samples using more sophisticated laboratory spectrofluorometers. Acquisition of high frequency, long-term data series or high-resolution profiles is feasible and artifacts resulting from filtration or sample storage can be avoided when measurements are made using the WETStar DOM fluorometer. The utility of high-resolution DOM-FL profiles for biogeochemical studies is illustrated by in situ data obtained in the East Siberian Sea.
| Original language | English |
|---|---|
| Pages (from-to) | 441-449 |
| Number of pages | 9 |
| Journal | Estuarine, Coastal and Shelf Science |
| Volume | 67 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Apr 2006 |
| Externally published | Yes |
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Keywords
- Absorption coefficient
- Beaufort Sea
- Dissolved organic matter
- East Siberian Sea
- Fluorescence
ASJC Scopus subject areas
- Oceanography
- Aquatic Science
Cite this
Fluorescence measured using the WETStar DOM fluorometer as a proxy for dissolved matter absorption. / Belzile, Claude; Roesler, Collin S.; Christensen, John P.; Shakhova, Natalia; Semiletov, Igor.
In: Estuarine, Coastal and Shelf Science, Vol. 67, No. 3, 04.2006, p. 441-449.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Fluorescence measured using the WETStar DOM fluorometer as a proxy for dissolved matter absorption
AU - Belzile, Claude
AU - Roesler, Collin S.
AU - Christensen, John P.
AU - Shakhova, Natalia
AU - Semiletov, Igor
PY - 2006/4
Y1 - 2006/4
N2 - Dissolved organic matter (DOM) plays a significant role in freshwater and marine aquatic ecosystems including its effects on nutrients and carbon cycling and trace metal and contaminant availability. The colored fraction of DOM, CDOM, directly affects the quantity and spectral quality of available light, thereby impacting both primary production and UV exposure in aquatic ecosystems. Measuring the DOM absorption coefficient in situ is difficult because it requires prefiltration of the sample. From measurements made in inland, riverine, estuarine and coastal environments, we show that using the WETStar fluorometer (WET Labs), good estimates of dissolved absorption can be obtained from DOM fluorescence (DOM-FL) measured in situ on unfiltered samples. DOM-FL measured with the in situ fluorometer compare very well to values obtained on filtered samples using more sophisticated laboratory spectrofluorometers. Acquisition of high frequency, long-term data series or high-resolution profiles is feasible and artifacts resulting from filtration or sample storage can be avoided when measurements are made using the WETStar DOM fluorometer. The utility of high-resolution DOM-FL profiles for biogeochemical studies is illustrated by in situ data obtained in the East Siberian Sea.
AB - Dissolved organic matter (DOM) plays a significant role in freshwater and marine aquatic ecosystems including its effects on nutrients and carbon cycling and trace metal and contaminant availability. The colored fraction of DOM, CDOM, directly affects the quantity and spectral quality of available light, thereby impacting both primary production and UV exposure in aquatic ecosystems. Measuring the DOM absorption coefficient in situ is difficult because it requires prefiltration of the sample. From measurements made in inland, riverine, estuarine and coastal environments, we show that using the WETStar fluorometer (WET Labs), good estimates of dissolved absorption can be obtained from DOM fluorescence (DOM-FL) measured in situ on unfiltered samples. DOM-FL measured with the in situ fluorometer compare very well to values obtained on filtered samples using more sophisticated laboratory spectrofluorometers. Acquisition of high frequency, long-term data series or high-resolution profiles is feasible and artifacts resulting from filtration or sample storage can be avoided when measurements are made using the WETStar DOM fluorometer. The utility of high-resolution DOM-FL profiles for biogeochemical studies is illustrated by in situ data obtained in the East Siberian Sea.
KW - Absorption coefficient
KW - Beaufort Sea
KW - Dissolved organic matter
KW - East Siberian Sea
KW - Fluorescence
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UR - http://www.scopus.com/inward/citedby.url?scp=33644979463&partnerID=8YFLogxK
U2 - 10.1016/j.ecss.2005.11.032
DO - 10.1016/j.ecss.2005.11.032
M3 - Article
VL - 67
SP - 441
EP - 449
JO - Estuarine, Coastal and Shelf Science
JF - Estuarine, Coastal and Shelf Science
SN - 0272-7714
IS - 3
ER -