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Type: Artigo de periódico
Title: Quantification Of Atmosphere - Soil Mercury Fluxes By Using A Dynamic Flux Chamber: Application At The Negro River Basin, Amazon [quantificação De Fluxos De Mercúrio Gasoso Na Interface Solo/atmosfera Utilizando Câmara De Fluxo Dinâmica: Aplicação Na Bacia Do Rio Negro]
Author: Magarelli G.
Fostier A.H.
Abstract: Gaseous mercury sampling conditions were optimized and a dynamic flux chamber was used to measure the air/surface exchange of mercury in some areas of the Negro river basin with different vegetal coverings. At the two forest sites (flooding and non-flooding), low mercury fluxes were observed: maximum of 3 pmol m-2 h-1 - day and minimum of -1 pmol m-2 h-1 - night. At the deforested site, the mercury fluxes were higher and always positive: maximum of 26 pmol m-2 h-1 - day and 17 pmol m-2 h-1 - night. Our results showed that deforestation could be responsible for significantly increasing soil Hg emissions, mainly because of the high soil temperatures reached at deforested sites.
Rights: aberto
Identifier DOI: 
Date Issue: 2005
Appears in Collections:Unicamp - Artigos e Outros Documentos

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