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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
22/11/2011 |
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Data da última atualização: |
27/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
QUERINO, C. A. S.; SMEETS, C. J. P. P.; VIGANO, I.; HOLZINGER, R.; MOURA, V.; GATTI, L. V.; MARTINEWSKI, A.; MANZI, A. O.; ARAUJO, A. C. de; RÖCKMANN, T. |
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Afiliação: |
C. A. S. Querino, Utrecht University; C. J. P. P. Smeets, Utrecht University; I. Vigano, Utrecht University; R. Holzinger, Utrecht University; V. MOURA, INPA; L. V. Gatti, IPEN; A. Martinewski, IPEN; A. O. Manzi, INPA; ALESSANDRO CARIOCA DE ARAUJO, INPA / CPATU; T. Röckmann, Utrecht University. |
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Título: |
Methane flux, vertical gradient and mixing ratio measurements in a tropical forest. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
Atmospheric Chemistry and Physics Discussions, v. 11, p. 5313-5350, Feb. 2011. |
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DOI: |
10.5194/acpd-11-5313-2011 |
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Idioma: |
Inglês |
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Conteúdo: |
Measurements of CH4 mixing ratio, vertical gradients and turbulent fluxes were carried out in a tropical forest (Reserva Biol ´ogica Cuieiras), about 60 km north of Manaus, Brazil. The methane mixing ratio and flux measurements were performed at a height of 53m (canopy height 35m). In addition, vertical CH4 gradients were measured within the canopy using custom made air samplers at levels of 2, 16 and 36m above ground. The methane gradients within the canopy reveal that there is a continuous methane source at the surface. No clear evidence for aerobic methane emission from the canopy was found. The methane fluxes above the canopy are small but consistently show an the canopy using custom made air samplers at levels of 2, 16 and 36m above ground. The methane gradients within the canopy reveal that there is a continuous methane source at the surface. No clear evidence for aerobic methane emission from the canopy was found. The methane fluxes above the canopy are small but consistently show an upward flux with a maximum early in the morning, and the measured fluxes are in agreement with what is expected from the positive CH4 gradient in the canopy. In the morning hours, a strong canopy venting peak is observed for both CH4 and CO2, but for CO2 this peak is then superimposed by photosynthetic uptake, whereas the peak lasts longer for CH4. Monthly averaged diurnal cycles of the CH4 mixing ratio show a decrease during daytime and increase during nighttime. The magnitude of the difference in CH4 mixing ratio between day and night gradually increases throughout the wet season. The fluxes required to explain the nighttime increase are in agreement with the nighttime fluxes measured above the canopy, which implies that the CH4 increase in the nighttime boundary layer originates from local sources MenosMeasurements of CH4 mixing ratio, vertical gradients and turbulent fluxes were carried out in a tropical forest (Reserva Biol ´ogica Cuieiras), about 60 km north of Manaus, Brazil. The methane mixing ratio and flux measurements were performed at a height of 53m (canopy height 35m). In addition, vertical CH4 gradients were measured within the canopy using custom made air samplers at levels of 2, 16 and 36m above ground. The methane gradients within the canopy reveal that there is a continuous methane source at the surface. No clear evidence for aerobic methane emission from the canopy was found. The methane fluxes above the canopy are small but consistently show an the canopy using custom made air samplers at levels of 2, 16 and 36m above ground. The methane gradients within the canopy reveal that there is a continuous methane source at the surface. No clear evidence for aerobic methane emission from the canopy was found. The methane fluxes above the canopy are small but consistently show an upward flux with a maximum early in the morning, and the measured fluxes are in agreement with what is expected from the positive CH4 gradient in the canopy. In the morning hours, a strong canopy venting peak is observed for both CH4 and CO2, but for CO2 this peak is then superimposed by photosynthetic uptake, whereas the peak lasts longer for CH4. Monthly averaged diurnal cycles of the CH4 mixing ratio show a decrease during daytime and increase during nighttime. The magnitude of the dif... Mostrar Tudo |
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Thesagro: |
Floresta Tropical. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/183178/1/acpd-11-5313-2011.pdf
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Marc: |
LEADER 02583naa a2200253 a 4500
001 2095958
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008 2011 bl uuuu u00u1 u #d
024 7 $a10.5194/acpd-11-5313-2011$2DOI
100 1 $aQUERINO, C. A. S.
245 $aMethane flux, vertical gradient and mixing ratio measurements in a tropical forest.$h[electronic resource]
260 $c2011
520 $aMeasurements of CH4 mixing ratio, vertical gradients and turbulent fluxes were carried out in a tropical forest (Reserva Biol ´ogica Cuieiras), about 60 km north of Manaus, Brazil. The methane mixing ratio and flux measurements were performed at a height of 53m (canopy height 35m). In addition, vertical CH4 gradients were measured within the canopy using custom made air samplers at levels of 2, 16 and 36m above ground. The methane gradients within the canopy reveal that there is a continuous methane source at the surface. No clear evidence for aerobic methane emission from the canopy was found. The methane fluxes above the canopy are small but consistently show an the canopy using custom made air samplers at levels of 2, 16 and 36m above ground. The methane gradients within the canopy reveal that there is a continuous methane source at the surface. No clear evidence for aerobic methane emission from the canopy was found. The methane fluxes above the canopy are small but consistently show an upward flux with a maximum early in the morning, and the measured fluxes are in agreement with what is expected from the positive CH4 gradient in the canopy. In the morning hours, a strong canopy venting peak is observed for both CH4 and CO2, but for CO2 this peak is then superimposed by photosynthetic uptake, whereas the peak lasts longer for CH4. Monthly averaged diurnal cycles of the CH4 mixing ratio show a decrease during daytime and increase during nighttime. The magnitude of the difference in CH4 mixing ratio between day and night gradually increases throughout the wet season. The fluxes required to explain the nighttime increase are in agreement with the nighttime fluxes measured above the canopy, which implies that the CH4 increase in the nighttime boundary layer originates from local sources
650 $aFloresta Tropical
700 1 $aSMEETS, C. J. P. P.
700 1 $aVIGANO, I.
700 1 $aHOLZINGER, R.
700 1 $aMOURA, V.
700 1 $aGATTI, L. V.
700 1 $aMARTINEWSKI, A.
700 1 $aMANZI, A. O.
700 1 $aARAUJO, A. C. de
700 1 $aRÖCKMANN, T.
773 $tAtmospheric Chemistry and Physics Discussions$gv. 11, p. 5313-5350, Feb. 2011.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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