| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m16d.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 8JMKD3MGP7W/37UFP5P |
| Repository | sid.inpe.br/mtc-m19@80/2010/07.30.11.23 (restricted access) |
| Last Update | 2010:08.12.13.33.03 (UTC) marciana |
| Metadata Repository | sid.inpe.br/mtc-m19@80/2010/07.30.11.23.45 |
| Metadata Last Update | 2021:02.10.18.35.35 (UTC) administrator |
| Secondary Key | INPE--PRE/ |
| DOI | 10.1016/j.agrformet.2009.11.005 |
| ISSN | 0168-1923 |
| Citation Key | AraujoDWGKZLSMNLB:2010:SpVaCO |
| Title | The spatial variability of CO2 storage and the interpretation of eddy covariance fluxes in central Amazonia  |
| Project | Brazilian government via Fundacao Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) BEX1845/02-0 |
| Year | 2010 |
| Month | Feb. |
| Access Date | 2024, Apr. 28 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 1151 KiB |
| 2. Context | |
| Author | 1 Araujo, A. C. 2 Dolman, A. J. 3 Waterloo, M. J. 4 Gash, J. H. C. 5 Kruijt, B. 6 Zanchi, F. B. 7 de Lange, J. M. E. 8 Stoevelaar, R. 9 Manzi, A. O. 10 Nobre, A. D. 11 Lootens, R. N. 12 Backer, J. |
| Group | 1 2 3 4 5 6 7 8 9 CPT-CPT-INPE-MCT-BR 10 CPT-CPT-INPE-MCT-BR |
| Affiliation | 1 INPA, Programa LBA, Av Andre Araujo 2936,Campus 2, BR-69060001 Manaus, Amazonas, Brazil. 2 Vrije Univ Amsterdam, Dept Hydrol & Geoenvironm Sci, NL-1081 HV Amsterdam, Netherlands. Kruijt, B. Wageningen UR, ESS CC, NL-6700 AA Wageningen, Netherlands 3 Vrije Univ Amsterdam, Dept Hydrol & Geoenvironm Sci, NL-1081 HV Amsterdam, Netherlands. Kruijt, B. Wageningen UR, ESS CC, NL-6700 AA Wageningen, Netherlands 4 Ctr Ecol & Hydrol, Wallingford OX10 8BB, Oxon, England 5 Wageningen UR, ESS CC, NL-6700 AA Wageningen, Netherlands 6 7 Vrije Univ Amsterdam, Dept Hydrol & Geoenvironm Sci, NL-1081 HV Amsterdam, Netherlands. Kruijt, B. Wageningen UR, ESS CC, NL-6700 AA Wageningen, Netherlands 8 Vrije Univ Amsterdam, Dept Hydrol & Geoenvironm Sci, NL-1081 HV Amsterdam, Netherlands. Kruijt, B. Wageningen UR, ESS CC, NL-6700 AA Wageningen, Netherlands 9 Instituto Nacional de Pesquisas Espaciais (INPE) 10 Instituto Nacional de Pesquisas Espaciais (INPE) 11 Vrije Univ Amsterdam, Dept Hydrol & Geoenvironm Sci, NL-1081 HV Amsterdam, Netherlands. Kruijt, B. Wageningen UR, ESS CC, NL-6700 AA Wageningen, Netherlands 12 Vrije Univ Amsterdam, Dept Hydrol & Geoenvironm Sci, NL-1081 HV Amsterdam, Netherlands. Kruijt, B. Wageningen UR, ESS CC, NL-6700 AA Wageningen, Netherlands |
| Journal | Agricultural and Forest Meteorology |
| Volume | 150 |
| Number | 2 |
| Pages | 226-237 |
| Secondary Mark | A1_CIÊNCIAS_AGRÁRIAS_I A2_CIÊNCIAS_BIOLÓGICAS_I A1_ENGENHARIAS_I A1_GEOCIÊNCIAS A1_INTERDISCIPLINAR |
| History (UTC) | 2011-09-06 14:22:03 :: marciana -> administrator :: 2010 2011-09-06 14:22:18 :: administrator -> banon :: 2010 2011-09-06 14:57:57 :: banon -> administrator :: 2010 2012-10-11 10:34:32 :: administrator -> marciana :: 2010 2013-02-21 20:08:27 :: marciana -> administrator :: 2010 2021-02-10 18:35:35 :: administrator -> marciana :: 2010 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Version Type | publisher |
| Keywords | Amazonia Lateral drainage CO2 vertical profile NEE Complex terrain Carbon balance Storage Ecosystem respiration Topography tropical forest rain-forest carbon-dioxide ecosystem respiration water-vapor exchange term catchment profiles accuracy |
| Abstract | The landscape of central Amazonia is composed of plateaus and valleys. Previous observations have shown preferential pooling of CO2 in the valleys, 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 diel, spatial and seasonal variation of S along the topography by using a set of automated [CO2] vertical profile measurement systems. In addition, NEE, the above-canopy turbulent exchange of CO2 (Fc) and meteorological variables were also measured on a micrometeorological tower located on the plateau. The nocturnal accumulation of CO2 was larger on the slopes and in the valleys than on the plateau and was larger in the dry period than in the wet period. 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 along the topographical gradient, lateral drainage of respired CO2 downslope, and temporal, spatial, and seasonal variation of soil CO2 efflux (Rsoil) are thought to have contributed to this. These conditions cause S to be higher in magnitude on the slopes and in the valleys than on the plateau during midmorning hours. We demonstrate that there is a larger underestimation of Reco by nighttime eddy covariance (EC) measurements in the dry period than in the wet period. In addition, Reco as derived from measurements only on the plateau (Fc + SP) does not agree with that derived by an independent method. Yet S fluxes peaked at about 18:0020:00 on the slopes and in the valleys, following a continuous decrease after this period until reaching a minimum just after dawn. NEE derived from Fc measured on the plateau and S measured on the plateau, slope and valley increased the estimates of Reco on the plateau by about 30% and 70% in the wet and dry periods, respectively. Particularly for flux-tower sites over complex terrain, we recommend measuring the spatial variability of CO2 at, at least two, more points along the topography to determine to what extent horizontal gradients and storage changes may contribute to tower fluxes. Finally, for sites that present topographical characteristics similar to that described in this study, care must be taken with the use of single in-canopy profiles of [CO2] to correct EC fluxes. |
| Area | MET |
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > CGCPT > The spatial variability... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| Language | en |
| Target File | araujo.pdf |
| User Group | administrator banon marciana |
| Visibility | shown |
| Archiving Policy | denypublisher denyfinaldraft24 |
| Read Permission | deny from all and allow from 150.163 |
| Update Permission | not transferred |
| 5. Allied materials | |
| Mirror Repository | sid.inpe.br/mtc-m19@80/2009/08.21.17.02.53 |
| Next Higher Units | 8JMKD3MGPCW/3EUPEJL |
| Dissemination | WEBSCI; PORTALCAPES. |
| Host Collection | sid.inpe.br/mtc-m19@80/2009/08.21.17.02 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyholder copyright creatorhistory descriptionlevel e-mailaddress electronicmailaddress format isbn label lineage mark nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress readergroup resumeid rightsholder schedulinginformation secondarydate session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |