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www.biogeosciences-discuss.net/7/4857/2010/
doi:10.5194/bgd-7-4857-2010
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Long cold winters give higher stream water dissolved organic carbon (DOC) concentrations during snowmelt
1Dept. of Forest Ecology and Management, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden
2Dept. of Ecology and Environmental Science, Umeå University, 901 87 Umeå, Sweden
3Dept. of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, P.O. Box 7050, 750 07 Uppsala, Sweden
Abstract. We show that long cold winters enhanced the stream water dissolved organic carbon (DOC) concentrations during the following spring flood. Using a 15 year stream record from a boreal catchment, we demonstrate that the interannual variation in DOC concentrations during spring flood was related to the discharge, and winter climate. That discharge is important for DOC concentration agrees with previous studies. By controlling for discharge we could detect that the winter climatic conditions during the preceding winter affected the soil water DOC concentrations, which in turn affected the concentrations in the stream. The results from the stream time-series were also supported by a riparian soil frost experiment, which showed that a long period of soil frost promoted high DOC concentrations in the soil water.
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Notice on Discussion StatusCitation: Ågren, A., Haei, M., Köhler, S., Bishop, K., and Laudon, H.: Long cold winters give higher stream water dissolved organic carbon (DOC) concentrations during snowmelt, Biogeosciences Discuss., 7, 4857-4886, doi:10.5194/bgd-7-4857-2010, 2010. Bibtex EndNote Reference Manager XML
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