| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m16b.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | x6e6X3pFwXQZ3DUS8rS5/CTAnF |
| Repository | cptec.inpe.br/walmeida/2004/07.27.14.48 (restricted access) |
| Last Update | 2005:04.25.03.00.00 (UTC) administrator |
| Metadata Repository | cptec.inpe.br/walmeida/2004/07.27.14.48.06 |
| Metadata Last Update | 2022:03.24.03.57.21 (UTC) administrator |
| Secondary Key | INPE-11149-PRE/6605 |
| ISSN | 0177-798X |
| Citation Key | RandowMKOZSHGEWCK:2004:CoMeSe |
| Title | Comparative measurements and seasonal variations in energy and carbon exchange over forest and pasture in South West Amazonia  |
| Year | 2004 |
| Month | Jun. |
| Access Date | 2024, Apr. 27 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 908 KiB |
| 2. Context | |
| Author | 1 von Randow, Celso 2 Manzi, Antonio Ocimar 3 Kruijt, B. 4 Oliveira, P. J. de 5 Zanchi, F. B. 6 Silva, R. L. 7 Hodnett, M. G. 8 Gash, J. H. C. 9 Elbers, J. A. 10 Waterloo, M. J. 11 Cardoso, F. L. 12 Kabat, P. |
| Group | 1 CPT-INPE-MCT-BR 2 LBA-INPE-MCT-BR |
| Affiliation | 1 CPTEC-INPE-Cachoeira Paulista-12630-000-SP-Brasil |
| e-Mail Address | fabia@cptec.inpe.br |
| Journal | Theoretical and Applied Climatology |
| Volume | 78 |
| Number | 1-3 |
| Pages | 5-26 |
| History (UTC) | 2005-04-25 16:54:34 :: Fabia -> administrator :: 2008-06-10 19:50:43 :: administrator -> estagiario :: 2010-05-11 16:54:06 :: estagiario -> administrator :: 2022-03-24 03:57:21 :: administrator -> marciana :: 2004 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Keywords | surface-air exchange rain-forest land-surface micrometeorological observations tall vegetation dioxide water flux climate towers |
| Abstract | Comparative measurements of radiation flux components and turbulent fluxes of energy and CO2 are made at two sites in South West Amazonia: one in a tropical forest reserve and one in a pasture. The data were collected from February 1999 to September 2002, as part of the Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA). During the dry seasons, although precipitation and specific humidity are greatly reduced, the soil moisture storage profiles down to 3.4 m indicate that the forest vegetation continues to withdraw water from deep layers in the soil. For this reason, seasonal changes observed in the energy partition and CO2 fluxes in the forest are small, compared to the large reductions in evaporation and photosynthesis observed in the pasture. For the radiation balance, the reflected short wave radiation increases by about 55% when changing from forest to pasture. Combined with an increase of 4.7% in long wave radiation loss, this causes an average reduction of 13.3% in net radiation in the pasture, compared to the forest. In the wet season, the evaporative fraction (lambdaE/R-n) at the pasture is 17% lower than at the forest. This difference increases to 24% during the dry season. Daytime CO2 fluxes are 20-28% lower (in absolute values) in the pasture compared to the forest. The night-time respiration in the pasture is also reduced compared to the forest, with averages 44% and 57% lower in the wet and dry seasons, respectively. As the reduction in the nocturnal respiration is larger than the reduction in the daytime uptake, the combined effect is a 19-67% higher daily uptake of CO2 in the pasture, compared to the forest. This high uptake of CO2 in the pasture site is not surprising, since the growth of the vegetation is constantly renewed, as the cattle remove the biomass. |
| Area | MET |
| Arrangement 1 | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > CGCPT > Comparative measurements and... |
| Arrangement 2 | urlib.net > BDMCI > Fonds > Produção até 2016 > LBA > Comparative measurements and... |
| 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 | Comparative_Von Randow.pdf |
| User Group | Fabia administrator |
| Visibility | shown |
| Copy Holder | SID/SCD |
| Archiving Policy | denypublisher denyfinaldraft12 |
| Read Permission | deny from all and allow from 150.163 |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3EUPEJL 8JMKD3MGPCW/46J83KE |
| Dissemination | WEBSCI; PORTALCAPES; MGA. |
| Host Collection | cptec.inpe.br/walmeida/2003/04.25.17.12 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyright creatorhistory descriptionlevel documentstage doi electronicmailaddress format isbn label lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project readergroup resumeid rightsholder schedulinginformation secondarydate secondarymark session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url versiontype |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |