Deriving colored dissolved organic matter absorption coefficient from ocean color with a neural quasi-analytical algorithm

2017 ◽  
Vol 122 (11) ◽  
pp. 8543-8556 ◽  
Author(s):  
Jun Chen ◽  
Xianqiang He ◽  
Bin Zhou ◽  
Delu Pan
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Absorption Coefficient ◽  
Ocean Color ◽  
Colored Dissolved Organic Matter ◽  
Analytical Algorithm

scholarly journals Tracing the transport of colored dissolved organic matter in water masses of the Southern Beaufort Sea: relationship with hydrographic characteristics

2012 ◽  
Vol 9 (3) ◽  
pp. 925-940 ◽  
Author(s):  
A. Matsuoka ◽  
A. Bricaud ◽  
R. Benner ◽  
J. Para ◽  
R. Sempéré ◽  
...  
Keyword(s):  
Organic Matter ◽  
Surface Layer ◽  
Dissolved Organic Matter ◽  
Heat Budget ◽  
Ocean Color ◽  
Beaufort Sea ◽  
The Arctic ◽  
Strongly Correlated ◽  
Colored Dissolved Organic Matter ◽  
Color Data

Abstract. Light absorption by colored dissolved organic matter (CDOM) [aCDOM(λ)] plays an important role in the heat budget of the Arctic Ocean, contributing to the recent decline in sea ice, as well as in biogeochemical processes. We investigated aCDOM(λ) in the Southern Beaufort Sea where a significant amount of CDOM is delivered by the Mackenzie River. In the surface layer, aCDOM(440) showed a strong and negative correlation with salinity, indicating strong river influence and conservative transport in the river plume. Below the mixed layer, a weak but positive correlation between aCDOM(440) and salinity was observed above the upper halocline, resulting from the effect of removal of CDOM due to brine rejection and lateral intrusion of Pacific summer waters into these layers. In contrast, the relationship was negative in the upper and the lower haloclines, suggesting these waters originated from Arctic coastal waters. DOC concentrations in the surface layer were strongly correlated with aCDOM(440) (r2 = 0.97), suggesting that this value can be estimated in this area, using aCDOM(440) that is retrieved using satellite ocean color data. Implications for estimation of DOC concentrations in surface waters using ocean color remote sensing are discussed.

Using Satellite Remote Sensing to Estimate the Colored Dissolved Organic Matter Absorption Coefficient in Lakes

Ecosystems ◽  
2005 ◽  
Vol 8 (6) ◽  
pp. 709-720 ◽  
Author(s):  
Tiit Kutser ◽  
Donald C. Pierson ◽  
Lars Tranvik ◽  
Anu Reinart ◽  
Sebastian Sobek ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Absorption Coefficient ◽  
Satellite Remote Sensing ◽  
Colored Dissolved Organic Matter

scholarly journals Spectral bio-optical properties of water of Atlantic sector of Antarctic

2020 ◽  
Vol 5 (4) ◽  
pp. 69-78
Author(s):  
N. A. Moiseeva ◽  
T. Ya. Churilova ◽  
T. V. Efimova ◽  
V. A. Artemiev ◽  
E. Yu. Skorokhod
Keyword(s):  
Organic Matter ◽  
Optical Properties ◽  
Dissolved Organic Matter ◽  
Absorption Coefficient ◽  
Chlorophyll A ◽  
Light Absorption ◽  
Colored Dissolved Organic Matter ◽  
Atlantic Sector ◽  
Light Absorption Coefficient ◽  
The Relationship

Studies of variability of spectral bio-optical properties of water of Atlantic sector of Antarctic were carried out during the 79th cruise of the RV “Akademik Mstislav Keldysh” (11.01.2020–04.02.2020). Chlorophyll a and phaeopigment concentration varied in the layer studied from 0.1 to 1.8 mg·m−3, except for two stations with content reaching 2.2 and 4.4 mg·m−3. The relationship was revealed between light absorption coefficient by phytoplankton and chlorophyll a concentration at a wavelength, corresponding to spectrum maxima: aph(438) = 0.044 × Ca1.2, r2 = 0.84 (n = 117); aph(678) = 0.021 × Ca1.1, r2 = 0.89 (n = 117). Spectral distribution of light absorption coefficient by non-algal particles and colored dissolved organic matter was described by exponential function. Absorption parameterization coefficients were retrieved: (1) light absorption coefficient by non-algal particles (0.001–0.027 m−1) and by colored dissolved organic matter (0.016–0.19 m−1) at a wavelength of 438 nm; (2) spectral slope coefficients of these components (0.005–0.016 and 0.009–0.022 nm−1, respectively).

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