Ozone dynamics and deposition processes at a deforested site in the Amazon basin

Jeffrey M. Sigler, Jose D. Fuentes, Ryan C. Heitz, Michael Garstang, Gilberto Fisch

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The goal of this study is to investigate the impact of deforestation on ozone dynamics and deposition in the Brazilian Amazon basin. This goal is accomplished through i) analyses of ozone levels and deposition rates at a deforested site during the rainy season; and ii) comparisons of these data with similar information derived at a forest. At the pasture site maximum ozone mixing ratios reach 20 parts per billion on a volume basis (ppbv) but about 6 ppbv prevail over the forest. Maximum ozone deposition velocities for pastures can reach 0.7 cm s-1, which is about threefold lower than values derived for forests. Combining ozone abundance and deposition velocities, pasture maximum ozone fluxes reach ∼0.2 μg (ozone) m-2 s-1. This flux represents approximately 70% of the deposition rates measured over the forest. Hence, this study suggests that conversion of rainforests to pastures could lead to a net reduction (30%) in the ozone sink in the Amazon.

Original languageEnglish (US)
Pages (from-to)21-27
Number of pages7
JournalAmbio
Volume31
Issue number1
DOIs
StatePublished - Jan 1 2002

Fingerprint

Ozone
ozone
basin
pasture
deposition velocity
Deposition rates
Fluxes
Deforestation
rainforest
mixing ratio
deforestation
Values

All Science Journal Classification (ASJC) codes

  • Geography, Planning and Development
  • Environmental Chemistry
  • Ecology

Cite this

Sigler, Jeffrey M. ; Fuentes, Jose D. ; Heitz, Ryan C. ; Garstang, Michael ; Fisch, Gilberto. / Ozone dynamics and deposition processes at a deforested site in the Amazon basin. In: Ambio. 2002 ; Vol. 31, No. 1. pp. 21-27.
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Ozone dynamics and deposition processes at a deforested site in the Amazon basin. / Sigler, Jeffrey M.; Fuentes, Jose D.; Heitz, Ryan C.; Garstang, Michael; Fisch, Gilberto.

In: Ambio, Vol. 31, No. 1, 01.01.2002, p. 21-27.

Research output: Contribution to journalArticle

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