2016
DOI: 10.1002/lno.10366
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Apparent quantum yield of photochemical dissolved organic carbon mineralization in lakes

Abstract: Up to one tenth of the carbon dioxide (CO2) emissions from inland waters worldwide are directly induced by the photochemical mineralization of dissolved organic matter (DOM). The photochemical production of dissolved inorganic carbon (DIC) per photon absorbed by chromophoric DOM (CDOM) decreases exponentially with increasing irradiance wavelength, and is commonly described by an “apparent quantum yield” (AQY) spectrum. Although an essential model parameter to simulate photochemical mineralization the AQY remai… Show more

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Cited by 42 publications
(75 citation statements)
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References 61 publications
(121 reference statements)
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“…Our spectral AQY for DIC photoproduction from tDOC approximates an average photoreactivity of tDOC from its entrance to estuary to its complete removal by photobleaching. This differs from earlier studies, which have characterized at the site of sample collection (Aarnos et al, 2012;Bélanger et al, 2006;Gao & Zepp, 1998;Groeneveld et al, 2016;Johannessen & Miller, 2001;Johannessen et al, 2007;Koehler et al, 2014Koehler et al, , 2016Powers & Miller, 2015;Reader & Miller, 2012;Vähätalo & Wetzel, 2004;Vähätalo et al, 2000;White et al, 2010). Our experimental irradiations photobleached about half of tCDOM and characterize the photoreactivity of tDOC at those sites of river plumes, where solar radiation has photobleached about half of tCDOM.…”
Section: The Annual Areal Rates Of Dic Photoproduction From Tdoc In Rcontrasting
confidence: 94%
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“…Our spectral AQY for DIC photoproduction from tDOC approximates an average photoreactivity of tDOC from its entrance to estuary to its complete removal by photobleaching. This differs from earlier studies, which have characterized at the site of sample collection (Aarnos et al, 2012;Bélanger et al, 2006;Gao & Zepp, 1998;Groeneveld et al, 2016;Johannessen & Miller, 2001;Johannessen et al, 2007;Koehler et al, 2014Koehler et al, , 2016Powers & Miller, 2015;Reader & Miller, 2012;Vähätalo & Wetzel, 2004;Vähätalo et al, 2000;White et al, 2010). Our experimental irradiations photobleached about half of tCDOM and characterize the photoreactivity of tDOC at those sites of river plumes, where solar radiation has photobleached about half of tCDOM.…”
Section: The Annual Areal Rates Of Dic Photoproduction From Tdoc In Rcontrasting
confidence: 94%
“…This differs from earlier studies, which have characterized φ λ at the site of sample collection [Vähätalo et al, 2000;Vähätalo and Wetzel , 2004;Koehler et al, 2014;Groeneveld et al, 2016;Koehler et al, 2016;Gao and Zepp, 1998;Bélanger et al, 2006;White et al, 2010;Johannessen and Miller , 2001;Johannessen et al, 2007;Aarnos et al, 2012;Reader and Miller , 2012;Powers et al, 2015]. Our experimental irradiations photobleached about half of tCDOM and characterize the photoreactivity of tDOC at those sites of river plumes, where solar radiation has photobleached about half of tC-DOM.…”
Section: The Annual Areal Rates Of Dic Photoproduction From Tdoc In Rcontrasting
confidence: 53%
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“…It is often assumed that the higher the aromaticity and degree of pigmentation of DOC, the more absorption of UV irradiation and thus the higher CO 2 emissions caused by photo-mineralization. Support of this assumption has to some extent been found in comparisons between lakes with different color (Molot and Dillon 1997;Koehler et al 2016). High molecular weight substances such as humic and fulvic acids are colored (Mostofa et al 2013) and hence susceptible to photo-mineralization (Benner and Kaiser 2011).…”
Section: Introductionmentioning
confidence: 98%