The Effect of Allochthonous Organic Matter on Changes in Optical Properties of Recultivated Lake Kortowskie Waters

2008 ◽  
Vol 23 (1) ◽  
pp. 110-120 ◽  
Author(s):  
Roman Głażewski ◽  
Grzegorz Wiśniewski
Keyword(s):  
Organic Matter ◽  
Optical Properties ◽  
Allochthonous Organic Matter

Sources and distribution of allochthonous organic matter in surface sediment from the Seomjin River to the southern inner shelf of Korea

2017 ◽  
Vol 52 (4) ◽  
pp. 489-499
Author(s):  
Adegoke Olugboyega Badejo ◽  
Sangmin Hyun ◽  
Wonnyon Kim ◽  
Se-Jong Ju ◽  
Bareum Song
Keyword(s):  
Organic Matter ◽  
Surface Sediment ◽  
Allochthonous Organic Matter ◽  
Inner Shelf ◽  
Seomjin River

Bacterial decomposition of allochthonous organic matter in shallow subtropical lakes

2021 ◽  
Vol 26 (4) ◽  
Author(s):  
Pâmela R. Gayer ◽  
Pablo S. Guimarães ◽  
Edélti F. Albertoni ◽  
Luiz U. Hepp
Keyword(s):  
Organic Matter ◽  
Allochthonous Organic Matter ◽  
Subtropical Lakes ◽  
Bacterial Decomposition

scholarly journals Fluorescence and absorption properties of chromophoric dissolved organic matter (CDOM) in coastal surface waters of the northwestern Mediterranean Sea, influence of the Rhône River

2010 ◽  
Vol 7 (12) ◽  
pp. 4083-4103 ◽  
Author(s):  
J. Para ◽  
P. G. Coble ◽  
B. Charrière ◽  
M. Tedetti ◽  
C. Fontana ◽  
...  
Keyword(s):  
Organic Matter ◽  
Optical Properties ◽  
Mediterranean Sea ◽  
Surface Waters ◽  
Chromophoric Dissolved Organic Matter ◽  
River Plumes ◽  
Rhône River ◽  
Rhone River ◽  
Northwestern Mediterranean Sea ◽  
Northwestern Mediterranean

Abstract. Seawater samples were collected monthly in surface waters (2 and 5 m depths) of the Bay of Marseilles (northwestern Mediterranean Sea; 5°17'30" E, 43°14'30" N) during one year from November 2007 to December 2008 and studied for total organic carbon (TOC) as well as chromophoric dissolved organic matter (CDOM) optical properties (absorbance and fluorescence). The annual mean value of surface CDOM absorption coefficient at 350 nm [aCDOM(350)] was very low (0.10 ± 0.02 m−1) in comparison to values usually found in coastal waters, and no significant seasonal trend in aCDOM(350) could be determined. By contrast, the spectral slope of CDOM absorption (SCDOM) was significantly higher (0.023 ± 0.003 nm−1) in summer than in fall and winter periods (0.017 ± 0.002 nm−1), reflecting either CDOM photobleaching or production in surface waters during stratified sunny periods. The CDOM fluorescence, assessed through excitation emission matrices (EEMs), was dominated by protein-like component (peak T; 1.30–21.94 QSU) and marine humic-like component (peak M; 0.55–5.82 QSU), while terrestrial humic-like fluorescence (peak C; 0.34–2.99 QSU) remained very low. This reflected a dominance of relatively fresh material from biological origin within the CDOM fluorescent pool. At the end of summer, surface CDOM fluorescence was very low and strongly blue shifted, reinforcing the hypothesis of CDOM photobleaching. Our results suggested that unusual Rhône River plume eastward intrusion events might reach Marseilles Bay within 2–3 days and induce local phytoplankton blooms and subsequent fluorescent CDOM production (peaks M and T) without adding terrestrial fluorescence signatures (peaks C and A). Besides Rhône River plumes, mixing events of the entire water column injected relative aged (peaks C and M) CDOM from the bottom into the surface and thus appeared also as an important source of CDOM in surface waters of the Marseilles Bay. Therefore, the assessment of CDOM optical properties, within the hydrological context, pointed out several biotic (in situ biological production, biological production within Rhône River plumes) and abiotic (photobleaching, mixing) factors controlling CDOM transport, production and removal in this highly urbanized coastal area.

scholarly journals Optical Properties of Dissolved Organic Matter in Urban Fountains

2019 ◽  
Vol 221 ◽  
pp. 012112
Author(s):  
Katarzyna Parszuto ◽  
Renata Tandyrak ◽  
Renata Augustyniak ◽  
Jolanta Grochowska ◽  
Michal Lopata ◽  
...  
Keyword(s):  
Organic Matter ◽  
Optical Properties ◽  
Dissolved Organic Matter

scholarly journals Optical Properties and Photochemical Transformation of the Dissolved Organic Matter Released by Sargassum

2020 ◽  
Vol 7 ◽  
Author(s):  
Leanne C. Powers ◽  
Rossana Del Vecchio ◽  
Neil V. Blough ◽  
Natasha McDonald ◽  
Philippe Schmitt-Kopplin ◽  
...  
Keyword(s):  
Organic Matter ◽  
Optical Properties ◽  
Dissolved Organic Matter ◽  
Photochemical Transformation

scholarly journals Spatio-seasonal variability of chromophoric dissolved organic matter absorption and responses to photobleaching in a large shallow temperate lake

2017 ◽  
Vol 14 (5) ◽  
pp. 1215-1233 ◽  
Author(s):  
María Encina Aulló-Maestro ◽  
Peter Hunter ◽  
Evangelos Spyrakos ◽  
Pierre Mercatoris ◽  
Attila Kovács ◽  
...  
Keyword(s):  
Organic Matter ◽  
Optical Properties ◽  
Dissolved Organic Matter ◽  
Seasonal Variability ◽  
Chromophoric Dissolved Organic Matter ◽  
Lake Balaton ◽  
Spectral Slope ◽  
Marked Variability ◽  
Rich Material ◽  
Development And Validation

Abstract. The development and validation of remote-sensing-based approaches for the retrieval of chromophoric dissolved organic matter (CDOM) concentrations requires a comprehensive understanding of the sources and magnitude of variability in the optical properties of dissolved material within lakes. In this study, spatial and seasonal variability in concentration and composition of CDOM and the origin of its variation was studied in Lake Balaton (Hungary), a large temperate shallow lake in central Europe. In addition, we investigated the effect of photobleaching on the optical properties of CDOM through in-lake incubation experiments. There was marked variability throughout the year in CDOM absorption in Lake Balaton (aCDOM(440) = 0. 06–9.01 m−1). The highest values were consistently observed at the mouth of the main inflow (Zala River), which drains humic-rich material from the adjoining Kis-Balaton wetland, but CDOM absorption decreased rapidly towards the east where it was consistently lower and less variable than in the westernmost lake basins. The spectral slope parameter for the interval of 350–500 nm (SCDOM(350–500)) was more variable with increasing distance from the inflow (observed range 0.0161–0.0181 nm−1 for the mouth of the main inflow and 0.0158–0.0300 nm−1 for waters closer to the outflow). However, spatial variation in SCDOM was more constant exhibiting a negative correlation with aCDOM(440). Dissolved organic carbon (DOC) was strongly positively correlated with aCDOM(440) and followed a similar seasonal trend but it demonstrated more variability than either aCDOM or SCDOM with distance through the system. Photobleaching resulting from a 7-day exposure to natural solar UV radiation resulted in a marked decrease in allochthonous CDOM absorption (7.04 to 3.36 m−1, 42 % decrease). Photodegradation also resulted in an increase in the spectral slope coefficient of dissolved material.

Optical properties and molecular diversity of dissolved organic matter in the Bering Strait and Chukchi Sea

2017 ◽  
Vol 144 ◽  
pp. 104-111 ◽  
Author(s):  
Michael Gonsior ◽  
Jenna Luek ◽  
Philippe Schmitt-Kopplin ◽  
Jacqueline M. Grebmeier ◽  
Lee W. Cooper
Keyword(s):  
Organic Matter ◽  
Optical Properties ◽  
Dissolved Organic Matter ◽  
Molecular Diversity ◽  
Chukchi Sea ◽  
Bering Strait

Size fractionation and optical properties of dissolved organic matter in the continuum soil solution-bog-river and terminal lake of a boreal watershed

2014 ◽  
Vol 66 ◽  
pp. 14-24 ◽  
Author(s):  
Svetlana M. Ilina ◽  
Olga Yu. Drozdova ◽  
Sergey A. Lapitskiy ◽  
Yuriy V. Alekhin ◽  
Vladimir V. Demin ◽  
...  
Keyword(s):  
Organic Matter ◽  
Optical Properties ◽  
Dissolved Organic Matter ◽  
Soil Solution ◽  
Size Fractionation ◽  
The Continuum
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