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Stream water geochemistry of boron and boron isotopes in a small boreal catchment affected by a major forest fire
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Geovetenskap och miljöteknik.ORCID-id: 0000-0003-4208-345X
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2009 (Engelska)Ingår i: Geochimica et Cosmochimica Acta, ISSN 0016-7037, E-ISSN 1872-9533, Vol. 73, nr 13, Supp. S, s. A952-Artikel i tidskrift, Meeting abstract (Övrigt vetenskapligt) 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.

Ort, förlag, år, upplaga, sidor
2009. Vol. 73, nr 13, Supp. S, s. A952-
Nyckelord [en]
Natural sciences - Earth sciences
Nyckelord [sv]
Naturvetenskap - Geovetenskap
Nationell ämneskategori
Ekologi Geokemi
Forskningsämne
Landskapsekologi; Tillämpad geologi
Identifikatorer
URN: urn:nbn:se:ltu:diva-34020Lokalt ID: 81d62490-7dae-11de-8da0-000ea68e967bOAI: oai:DiVA.org:ltu-34020DiVA, id: diva2:1007269
Konferens
Annual V.M. Goldschmidt Conference : 21/06/2009 - 26/06/2009
Anmärkning
Godkänd; 2009; 20090731 (ysko)Tillgänglig från: 2016-09-30 Skapad: 2016-09-30 Senast uppdaterad: 2018-02-26Bibliografiskt granskad

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

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