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    Author(s): Celine Pallud; Charles C. Rhoades; Linden Schneider; Pranjal Dwivedi; Thomas Borch
    Date: 2020
    Source: Geochimica et Cosmochimica Acta. 280: 148-160.
    Publication Series: Scientific Journal (JRNL)
    Station: Rocky Mountain Research Station
    PDF: Download Publication  (1.0 MB)

    Description

    Concentrations of dissolved organic carbon (DOC) in surface waters have rapidly increased across Europe and North America over the past few decades. The causes for such trends have yet to be fully understood, although several factors including elevated temperatures and decreased atmospheric deposition of acid, nitrogen and sulfur, are considered responsible for the release of carbon from soils into streams. In order to determine how seasonal temperature patterns and soil physical and chemical characteristics influence iron (Fe)(III) reduction and DOC release to pore-water in subalpine wetland soils, we measured potential Fe(II) and DOC export rates at low (6 °C) and high (18 °C) temperatures using flow-through reactors containing undisturbed wetland soils sampled in the Fraser Experimental Forest (Colorado, USA) in two wetland types and at two depths.

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    Citation

    Pallud, Celine; Rhoades, Charles C.; Schneider, Linden; Dwivedi, Pranjal; Borch, Thomas. 2020. Temperature-induced iron (III) reduction results in decreased dissolved organic carbon export in subalpine wetland soils, Colorado, USA. Geochimica et Cosmochimica Acta. 280: 148-160.

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    Keywords

    soil temperature, water quality, soil carbon storage, reductive Fe(III) dissolution, headwater dissolved organic matter

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