Articles | Volume 12, issue 22
https://doi.org/10.5194/bg-12-6669-2015
https://doi.org/10.5194/bg-12-6669-2015
Research article
 | 
24 Nov 2015
Research article |  | 24 Nov 2015

Controls on dissolved organic matter (DOM) degradation in a headwater stream: the influence of photochemical and hydrological conditions in determining light-limitation or substrate-limitation of photo-degradation

R. M. Cory, K. H. Harrold, B.T. Neilson, and G. W. Kling

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Short summary
This study investigates how sunlight, dissolved organic matter (DOM) concentration and composition, and hydrology interact to control DOM degradation in headwater streams. In Imnavait Creek, a shallow, low-relief stream in the Arctic, DOM degradation by sunlight was limited by light under all conditions. Study results were used to synthesize controls on DOM degradation by sunlight for a river reach, expressed as a function of light attenuation and water residence times.
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