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Stream water geochemistry of boron and boron isotopes in a small boreal catchment affected by a major forest fire
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.ORCID iD: 0000-0003-4208-345X
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2009 (English)In: Geochimica et Cosmochimica Acta, ISSN 0016-7037, E-ISSN 1872-9533, Vol. 73, no 13, Supp. S, p. A952-Article in journal, Meeting abstract (Other academic) Published
Abstract [en]

Previous research [1] has suggested that the boron (B) isotope system has a potential to be used as a tracer for detecting historic wood fire events. It was hypothesized that highly elevated B concentrations in sediments of a lake, accompanied by an enrichment of 10B, were a result of an urban wood fire event in the 19th century. The δ11B decrease in these sediments exceeded 9 ., coinciding with a peak in the B concentration.To evaluate this hypothesis, seasonal isotopic pattern of boron (B) was investigated during spring and summer 2007 in a small stream draining a boreal forest area which was severely burnt in a major forest fire in the summer of 2006. Dissolved (< 0.22 µm) boron concentrations of the burnt area were significantly higher compared to a non-burnt reference stream, while 11B/10B ratios were significantly lower. Dissolved δ11B differences between the reference and the burnt area stream were found to be -9 to -22 .. We interpret the elevated B concentrations, accompanied by enrichment of 10B, in the burnt stream as wood and plant ash leaching of biogenic B from the burnt forest by surface run-off. Our results suggest that a boreal forest fire event significantly increases the leached amount of isotopically lighter B in the dissolved phase of stream run-off.[1] Peltola & Åström (2006), Appl. Geochem. 21 (2006) 941-948.

Place, publisher, year, edition, pages
2009. Vol. 73, no 13, Supp. S, p. A952-
Keywords [en]
Natural sciences - Earth sciences
Keywords [sv]
Naturvetenskap - Geovetenskap
National Category
Ecology Geochemistry
Research subject
Landscape Ecology; Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-34020Local ID: 81d62490-7dae-11de-8da0-000ea68e967bOAI: oai:DiVA.org:ltu-34020DiVA, id: diva2:1007269
Conference
Annual V.M. Goldschmidt Conference : 21/06/2009 - 26/06/2009
Note
Godkänd; 2009; 20090731 (ysko)Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2018-02-26Bibliographically approved

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Nordblad, FredrikRodushkin, IlyaEngström, EmmaEcke, FraukeÖhlander, BjörnIngri, Johan

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