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1. Identity statement
Reference TypeConference Abstract (Conference Proceedings)
Sitemtc-m16d.sid.inpe.br
Holder Codeisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identifier8JMKD3MGP7W/389BNNH
Repositorysid.inpe.br/mtc-m19/2010/09.16.18.25
Metadata Repositorysid.inpe.br/mtc-m19/2010/09.16.18.25.54
Metadata Last Update2020:08.17.19.27.13 (UTC) simone
Secondary KeyINPE--PRE/
Citation KeyAraujoDoWaGaKrVoMa:2010:CoMeCO
TitleComparative measurements of CO2 fluxes from a plateau and valley in central Amazonia
Year2010
Access Date2024, Mar. 28
Secondary TypePRE CI
2. Context
Author1 Araujo, Alessandro C. de
2 Dolman, A. J.
3 Waterloo, M.
4 Gash, J. H.
5 Kruijt, B.
6 Von Randow, Celso
7 Manzi, Antonio Ocimar
Group1
2
3
4
5
6 CST-CST-INPE-MCT-BR
Affiliation1 CESTU, Universidade do Estado do Amazonas, Manaus, Brazil
2 Hydrology and Geo-Environmental Sciences, VU University Amsterdam, Amsterdam, Netherlands
3 Hydrology and Geo-Environmental Sciences, VU University Amsterdam, Netherlands
4 Centrer for Ecology and Hydrology, Wallingford, United Kingdom
5 ESS-CC, Alterra, Wageningen, Netherlands
6 Instituto Nacional de Pesquisas Espaciais (INPE)
7 Programa LBA, Instituto Nacional de Pesquisas da Amazonia, Manaus, Brazil
Author e-Mail Address1 alessandro.araujo@gmail.com
2 han.dolman@geo.falw.vu.nl
3 maarten.waterloo@falw.vu.nl
4 jhg@ceh.ac.uk
5 bart.kruijt@wur.nl
6 celso.vonrandow@cptec.inpe.br
7 manzi@inpa.gov.br
Conference NameThe Meeting of the Americas.
Conference LocationFoz do Iguaçu
Date8-12 Aug. 2010
PublisherAGU
Book TitleAbstracts
History (UTC)2012-01-12 11:29:53 :: valdirene -> administrator :: 2010
2020-04-28 18:34:20 :: administrator -> simone :: 2010
3. Content and structure
Is the master or a copy?is the master
Content Stagecompleted
Transferable1
Content TypeExternal Contribution
Keywordsbiosphere
atmosphere interactions
carbon cycling
land
AbstractThe landscape of central Amazonia is composed of plateaus and valleys. Previous observations have shown preferential pooling of CO2 in the valleys (de Araujo et al., 2008a b), suggesting that the change in CO2 storage in the canopy air space (S) will be spatially variable at the scale of the topography. This may affect the interpretation of the net ecosystem CO2 exchange (NEE) rates measured on the plateaus if they have used one single atmospheric CO2 concentration (\\\\\\\\\\\\\\\\\\\\\\\\\\\[CO2\\\\\\\\\\\\\\\\\\\\\\\\\\\]) vertical profile measurement system. We have measured the diurnal and seasonal variation of S along the topography by using a set of \\\\\\\\\\\\\\\\\\\\\\\\\\\[CO2\\\\\\\\\\\\\\\\\\\\\\\\\\\] vertical profile measurement systems. In addition, NEE, the above-canopy turbulent exchange of CO2 (Fc) and meteorological variables were also measured by micrometeorological towers located on the plateau and in the valley. The nocturnal accumulation of CO2 was larger on the slopes and in the valleys than on the plateau, and was also larger in the dry season than in the wet season. In addition, the release of this CO2 occurred later in the day on the slopes and in the valleys than on the plateau. Differences in the flow regime above the canopy on the plateau and in the valley, the pattern of destruction of the nocturnal boundary layer in the valley, lateral drainage of respired CO2 downslope, and the temporal, spatial and seasonal variability of soil CO2 efflux (Rsoil) are thought to have contributed to this. These conditions cause S to be lower on the slopes and in the valleys than on the plateau during midmorning hours. It is very likely that the interpretation of NEE measured on both plateau and valley may be biased by S being lower in the valley than on the plateau. We were not able to distinguish which term of the mass balance equation (either Fc or S) for the plateau was more susceptible to the CO2 released from the valley during the period after dawn. We have demonstrated that the temporal and spatial variability of S along a gentle slope may confound the interpretation of NEE. As many of the flux measurement towers are set over non-flat terrain, care must be taken when using the NEE for determining the carbon balance.
AreaMET
Arrangementurlib.net > BDMCI > Fonds > Produção anterior à 2021 > COCST > Comparative measurements of...
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4. Conditions of access and use
Languageen
User Groupvaldirene
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Reader Groupadministrator
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Visibilityshown
Update Permissionnot transferred
5. Allied materials
Mirror Repositorysid.inpe.br/mtc-m19@80/2009/08.21.17.02.53
Next Higher Units8JMKD3MGPCW/3F3T29H
Host Collectionsid.inpe.br/mtc-m19@80/2009/08.21.17.02
6. Notes
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