Dissolved organic matter dynamics in surface waters affected by oil spill pollution: Results from the Serious Game exercise

Gonnelli, Margherita; Galletti, Yuri; Marchetti, E; Mercadante, L; Brogi, Simona Retelletti; Ribotti, Alberto; Sorgente, Roberto; Vestri, Stefano; Santinelli, Chiara

doi:10.1016/j.dsr2.2016.05.027

Cited by 29 publications

(14 citation statements)

References 46 publications

(55 reference statements)

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“…Peak C is usually attributed to allochthonous/terrigenous humic-like and/ or fulvic-like substances. Component C2 is also similar to the humic/fulvic-like components found in the mouth of the Arno River, eastern Ligurian Sea, and in the Black Sea (Table 4; Coble et al 1990;Coble 1996;Retelletti Brogi et al 2015;Gonnelli et al 2016). Component C3 shows emission/ excitation peaks similar to the peak N found in the Arabian and Black Seas (Coble et al 1990(Coble et al , 2008(Coble et al , 2014 and its origin is unclear; however, comparison with Gonnelli et al (2016) suggests that this peak can be associated with a mixture of polycyclic aromatic hydrocarbon (PAH)/protein-like material (Table 4).…”

Section: Fdomsupporting

confidence: 57%

“…Component C2 is also similar to the humic/fulvic-like components found in the mouth of the Arno River, eastern Ligurian Sea, and in the Black Sea (Table 4; Coble et al 1990;Coble 1996;Retelletti Brogi et al 2015;Gonnelli et al 2016). Component C3 shows emission/ excitation peaks similar to the peak N found in the Arabian and Black Seas (Coble et al 1990(Coble et al , 2008(Coble et al , 2014 and its origin is unclear; however, comparison with Gonnelli et al (2016) suggests that this peak can be associated with a mixture of polycyclic aromatic hydrocarbon (PAH)/protein-like material (Table 4). Component C4 shows emission/excitation peaks similar to humic-like peaks C1 (Coble et al 2014), identified in a number of systems (Coble et al 1998;Parlanti et al 2000;Stedmon et al 2003;Stedmon and Markager 2005a,b;Murphy et al 2008).…”

Section: Fdomsupporting

confidence: 57%

“…The CDOM data are reported as the Napierian absorption coefficient ( α λ ) in m −1 , calculated as follows:

α_{λ} = 2.303 * A_{λ} / l - k,

where A λ is absorbance (unitless) at a specified wavelength ( λ ), l is the cuvette pathlength in meters (Green and Blough ; Aiken ), and k is an offset calculated as the mean absorbance between wavelengths 650 nm and 700 nm (approximately zero). Specified wavelengths include 254 nm, 280 nm, and 325 nm (i.e., α 254 , α 280 , and α 325 ) since they have been widely used in the literature (e.g., Nelson et al ; Gonnelli et al ; Pitta et al ). The spectral slope between 275 nm and 295 nm ( S 275–295 ) was determined using the following equation:

α_{λ} = α_{λ_{0}} * e^{\land} (- S * (λ - λ_{0})),

where S is the spectral slope between wavelengths λ and λ 0 (i.e., 295 nm and 275 nm; Twardowski et al ).…”

Section: Methodsmentioning

confidence: 99%

“…where A k is absorbance (unitless) at a specified wavelength (k), l is the cuvette pathlength in meters (Green and Blough 1994;Aiken 2014), and k is an offset calculated as the mean absorbance between wavelengths 650 nm and 700 nm (approximately zero). Specified wavelengths include 254 nm, 280 nm, and 325 nm (i.e., a 254 , a 280 , and a 325 ) since they have been widely used in the literature (e.g., Nelson et al 2010;Gonnelli et al 2016;Pitta et al 2017). The spectral slope between 275 nm and 295 nm (S 275-295 ) was determined using the following equation:…”

Section: Optical Analysesmentioning

confidence: 99%

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Black Sea dissolved organic matter dynamics: Insights from optical analyses

Margolin

Gonnelli

Hansell

et al. 2018

Limnology & Oceanography

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To obtain qualitative information on the Black Sea's dissolved organic matter (DOM) pool, the optical properties (absorption and fluorescence) were measured in 111 samples collected across the basin. Chromophoric dissolved organic matter (CDOM) was considered at three wavelengths (254 nm, 280 nm, and 325 nm), along with the spectral slope between 275 nm and 295 nm (S275–295) and the specific ultraviolet absorbance at 254 nm (SUVA254). Using parallel factor analysis, a five‐component model identified three humic‐like components, a protein‐like component, and a polycyclic aromatic hydrocarbon‐like component. In the basin's oxic layer (upper ∼ 100 m), protein‐like CDOM was elevated, likely due to the production of this labile material, while humic‐like material was low, suggesting its removal by photo‐oxidation. In the underlying waters, the protein‐like material decreased, perhaps due to the utilization of this nitrogen‐containing DOM, while humic‐like material increased, suggesting its production at depth. In the anoxic layer (lower ∼ 2000 m), dissolved organic carbon (DOC) varied by only ∼ 10% while CDOM increased with depth by a factor of approximately two; the optical properties correlated well with the H2S‐equivalence of mineralization, referred to here as apparent carbon mineralization (ACM), while DOC did not. The strong correlation between CDOM and ACM is similar to correlations previously identified in the open ocean that compared CDOM with apparent oxygen utilization, suggesting that CDOM accumulates as a function of mineralization, independently of the oxidizing agent (i.e., oxygen or sulfate).

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Section: Fdomsupporting

confidence: 57%

Section: Fdomsupporting

confidence: 57%

“…The CDOM data are reported as the Napierian absorption coefficient ( α λ ) in m −1 , calculated as follows:

α_{λ} = 2.303 * A_{λ} / l - k,

α_{λ} = α_{λ_{0}} * e^{\land} (- S * (λ - λ_{0})),

where S is the spectral slope between wavelengths λ and λ 0 (i.e., 295 nm and 275 nm; Twardowski et al ).…”

Section: Methodsmentioning

confidence: 99%

Section: Optical Analysesmentioning

confidence: 99%

See 2 more Smart Citations

Black Sea dissolved organic matter dynamics: Insights from optical analyses

Margolin

Gonnelli

Hansell

et al. 2018

Limnology & Oceanography

View full text Add to dashboard Cite

show abstract

“…However, aer an oil spill, the spilled oil will be affected by the weathering process. The weathering processes mainly include evaporation, 16,17 dissolution, 18,19 dispersion, 20 hydrolysis, 21 biodegradation, 22,23 photooxidation, 24 emulsication, 25 adsorption onto suspended particulate materials, and sedimentation. 26 The long-term effects of weathering change the chemical composition and physical properties of spilled oil.…”

Section: Introductionmentioning

confidence: 99%