Liquid and chemical fluxes in precipitation, throughfall and stemflow: Observations from a deciduous forest and a red pine plantation in the midwestern USA

S.C. Pryor, R.J. Barthelmie

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Wet deposition (WD), throughfall (TF) and stemflow (SF) measurements undertaken in a deciduous forest show 85% of the WD liquid flux is observed as TF and approximately 2% as SF. TF and SF were observed to be enriched in base cations and accordingly had an average pH of 6.1 and 5.9, respectively relative to a WD pH of 5.1. The seasonal variability of TF pH below the deciduous canopies was more pronounced than that of WD though both exhibited a growing season maximum, and there is evidence that the seasonal variability of TF pH below the pines is inverted relative to the deciduous canopies likely due to enhanced dust capture and buffering by calcium carbonate. TF ion concentrations differed significantly between deciduous and pine canopies during the growing season, and there is some evidence that variation in sky view factor of 0.18-0.22 is sufficient to manifest statistically differing TF composition below sugar maples. The total atmospheric flux of inorganic nitrogen to the forest is approximately 14-18 kg-N ha(-1) yr(-1) supercript stop with approximately half taken up by the canopy. Associated experiments designed to quantify uncertainties in the nutrient fluxes included laboratory tests of the Aerochem automated wet-dry sampler. These experiments indicate the delay in initiating sample collection is less than half a minute for rainfall rates above 1 cm h(-1), but may increase substantially for lower precipitation rates.
    Original languageEnglish
    JournalWater, Air and Soil Pollution
    Volume163
    Issue number1-4
    Pages (from-to)203-227
    ISSN0049-6979
    DOIs
    Publication statusPublished - 2005

    Fingerprint

    Dive into the research topics of 'Liquid and chemical fluxes in precipitation, throughfall and stemflow: Observations from a deciduous forest and a red pine plantation in the midwestern USA'. Together they form a unique fingerprint.

    Cite this