Solar energy budgets in central Amazonian ecosystems: a comparison between natural forest and bare soil areas

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dc.contributor.authorLeopoldo, P. R. [UNESP]
dc.contributor.authorChaves, J. G. [UNESP]
dc.contributor.authorFranken, W. K.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionInstituto Nacional de Pesquisas da Amazônia (INPA)
dc.date.accessioned2014-05-27T11:17:53Z
dc.date.available2014-05-27T11:17:53Z
dc.date.issued1993-07-01
dc.description.abstractIn order to estimate the deforestation consequences on the actual solar energy budget of the Central Amazon Region, two ecosystems of different characteristics were compared. The present conditions of the region were represented by a typical 'terra firme' forest cover located at INPA's Ducke Forest Reserve, where the measurements necessary to evaluate its solar energy balance were carried out. The second ecosystem, simulating a deforested area, was represented by an area about 1.0 ha without natural vegetation and situated in the same Reserve. In this area lysimeters were placed, two of them filled with yellow latosol and two others with quartzose sand soil. Both soils are representative soils in the region. Their water balances were taken into account as well as the other parameters necessary to compute the solar energy balances. The results showed that water loss by evaporation was about 41.8% of the total precipitation in the yellow latosol lysimeters and about 26.4% for the quartzose sand ones. For the forest cover it was estimated an evapotranspiration of 67.9% of the rainfall amount. In relation to solar energy balance calculated for the forest cover, it was found that 83.1% of the total energy incoming to this ecosystem was used by the evapotranspiration process, while the remaining of 16.9% can be taken as sensible heat. For bare soils, 55.1% and 31.8% of the total energy were used as latent heat by yellow latosol and quartzose sand soils, respectively. So, the remaining amounts of 44.9% and 68.2% were related to sensible heat and available to atmospheric air heating of these ecosystems. Such results suggest that a large deforestation of the Amazon Region would have direct consequences on their water and solar radiation balances, with an expected change on the actual climatic conditions of the region. © 1993.en
dc.description.affiliationDepartamento de Engenharia Rural FCA UNESP, P.O. Box 237, 18600 Botucatu, SP
dc.description.affiliationInstituto Nacional de Pesquisas da Amazonia, P.O. Box 487, 69000 Manaus, AM
dc.description.affiliationUnespDepartamento de Engenharia Rural FCA UNESP, P.O. Box 237, 18600 Botucatu, SP
dc.format.extent313-328
dc.identifierhttp://dx.doi.org/10.1016/0378-1127(93)90010-K
dc.identifier.citationForest Ecology and Management, v. 59, n. 3-4, p. 313-328, 1993.
dc.identifier.doi10.1016/0378-1127(93)90010-K
dc.identifier.issn0378-1127
dc.identifier.scopus2-s2.0-0027870014
dc.identifier.urihttp://hdl.handle.net/11449/64383
dc.language.isoeng
dc.relation.ispartofForest Ecology and Management
dc.relation.ispartofjcr3.169
dc.relation.ispartofsjr1,625
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectbare soil
dc.subjectclimatic change
dc.subjectdeforestation
dc.subjectforest
dc.subjectsoils
dc.subjectsolar energy budget
dc.subjecttropical rain forest
dc.subjectwater balance
dc.subjectBrazil, Amazon
dc.subjectLatin America, Amazon
dc.titleSolar energy budgets in central Amazonian ecosystems: a comparison between natural forest and bare soil areasen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Ciências Agronômicas, Botucatupt
unesp.departmentEngenharia Rural - FCApt

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Botucatu - FCA - Faculdade de Ciências Agronômicas