Non-COsub(2) volatile carbon emissions and net ecosystem exchange in Amazonia
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2000
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LBA SCIENTIFIC CONFERENCE, 1st
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Resumo
At present, the global CO, budget requires the addition of a large, unidentified terrestrial
8ink in order to balance. After peatlands, forests contain the largest terrestrial reservoirs of
carbon. Landuse changes in forested areas, therefore, represent a significant potential
impact on the global carbon cycle. The net exchange of CO, between ecosystems and the
atmosphere is a measure of the net ecosystem exchange of carbon (NEE). The net flux of
CO; should be into young, rapidly growing forests; out of areas of recently cleared forest
areas (as the organic matter decomposes); but near zero for mature or primary forests.
The estimation of the nct carbon exchange is complicated by the potential for missing a
significant exchange of non-CO, carbon. Living and dead organic matter emit a variety of
volatile organic compounds (VOCs), including carbon monoxide, methane, isoprene,
monoterpenes, methanol, acetone, acetaldehyde, formaldehyde, many VOCs related to
damage of plant tissue, etc.
We have measured several of these non-CO, VOC emissions at the landscape level in
various states in Amazdnia, including Amazdnas (near Balbina, primary and secondary
forest), Rondonia (recently cleared forest and pasture as well as primary forest) and Para
(near Santarém, primary and secondary forest). The atmospheric concentration profiles of
these VOC emissions were used to estimate hourly and daily emissions; a biogenic
emission model was used to extrapolate these emissions to na annual flux. This annual
emission estimate was then used to gauge the importance of non-CO, VOC emissions to
NEE in Amazonia,
Como referenciar
GREENBERG, J.P.; GUENTHER, A.B.; VEGA BUSTILLOS, J.O.W.; HARLEY, P.; GATTI, L.V. Non-COsub(2) volatile carbon emissions and net ecosystem exchange in Amazonia. In: LBA SCIENTIFIC CONFERENCE, 1st, June 26-30, 2000, Belem, PA. Abstracts... p. 92. Disponível em: http://repositorio.ipen.br/handle/123456789/21124. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.