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Bryan D. Downing

Researcher at United States Geological Survey

Publications -  31
Citations -  2068

Bryan D. Downing is an academic researcher from United States Geological Survey. The author has contributed to research in topics: Dissolved organic carbon & San Joaquin. The author has an hindex of 18, co-authored 31 publications receiving 1677 citations.

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Optical properties of dissolved organic matter (DOM): Effects of biological and photolytic degradation

TL;DR: In this article, the authors measured changes in commonly used optical properties and indices in DOM leached from peat soil, plants, and algae following biological and photochemical degradation to determine whether they provide unique signatures that can be linked to original DOM source.
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High-Frequency in Situ Optical Measurements During a Storm Event: Assessing Relationships Between Dissolved Organic Matter, Sediment Concentrations, and Hydrologic Processes

TL;DR: In this article, the authors used identical in situ optical sensors for DOM fluorescence (FDOM) with and without filtration to continuously evaluate surface water DOM dynamics in a 415 km2 agricultural watershed over a 4 week period containing a short-duration rainfall event.
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Diurnal variability in riverine dissolved organic matter composition determined by in situ optical measurement in the San Joaquin River (California, USA)

TL;DR: In this paper, the authors examined whether diurnal processes measurably altered dissolved organic matter (DOM) concentration and composition in the hypereutrophic San Joaquin River (California) during a relatively quiescent period.
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Seeing the light: The effects of particles, dissolved materials, and temperature on in situ measurements of DOM fluorescence in rivers and streams

TL;DR: In this paper, the performance of four commercially available FDOM sensors under controlled laboratory conditions over ranges of temperature, dissolved organic matter (DOM) concentrations, and turbidity that spanned typical environmental ranges.
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Quantifying fluxes and characterizing compositional changes of dissolved organic matter in aquatic systems in situ using combined acoustic and optical measurements

TL;DR: In this article, the authors used coupled optical and acoustic measurements that provide robust quantitative estimates of concentrations and constituent characteristics needed to investigate processes and calculate fluxes of dissolved organic matter (DOM) in tidal and other lotic environments.