calibração do "simplified simple biosphere model - ssib" para áreas de pastagem e floresta na amazônia com dados do lba calibration of the simplified simple biosphere model (ssib) for amazonian pasture and forest sites using lba data

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ID: 150143
2005
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Ranked #3 of 44 articles by views in tumour biology : the journal of the international society for oncodevelopmental biology and medicine

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Abstract
Os parâmetros do "Simplified Simple Biosphere Model"-SSiB foram validados e posteriormente calibrados para os sítios de pastagem da Fazenda Nossa Senhora Aparecida (62º22'W; 10º45'S) e de floresta da Reserva Biológica do Jaru (62º22'W; 10º45'S), ambos situados no estado de Rondônia. Foram utilizadas medidas micrometeorológicas e hidrológicas obtidas durante o período seco de 2001, como parte do Experimento de Grande Escala da Biosfera-Atmosfera na Amazônia - LBA. Os resultados indicam que o modelo simulou bem o saldo de radiação, tanto na pastagem quanto na floresta. O fluxo de calor latente foi superestimado nos dois sítios nos períodos de simulação, o que deve estar relacionado aos parâmetros utilizados no cálculo dessa variável. O modelo subestimou o fluxo de calor sensível na pastagem e na floresta, principalmente no período noturno; porém, para a floresta, os valores foram mais próximos daqueles observados. Com os parâmetros ajustados, melhores estimativas dos fluxos de calor latente e de calor sensível foram geradas e, conseqüentemente, representou melhor as partições de energia na floresta e na pastagem.
The parameters of the Simplified Simple Biosphere Model - SSiB were validated and subsequently calibrated for the Fazenda Nossa Senhora Aparecida (62º22'W; 10º45'S) pasture site and the Reserva Biológica do Jaru (62º22'W; 10º45'S) forest site, both located in the state of Rondônia. Micrometeorological and hydrological data collected during the dry period of 2001, as part of the Large-Scale Biosphere-Atmosphere Experiment in Amazonia - LBA, were used. The results showed that the model simulated well the net radiation, both at the pasture and at the forest. The latent heat flux was super-estimated in both sites. The model sub-estimated the sensible heat flux at the pasture and at the forest, mainly during the night period; notwithstanding, the values for the forest were nearer to the observed ones. With the calibrated parameters, the model generated better estimations of the latent and the sensible heat fluxes, thus better representing the energy partition both at the forest and at the pasture.
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Authors ;Francis Wagner Silva Correia;Regina Célia dos Santos Alvalá;Antônio Ocimar Manzi;Ralf Gielow;Paulo Yoshio Kubota
Journal tumour biology : the journal of the international society for oncodevelopmental biology and medicine
Year 2005
DOI
10.1590/S0044-59672005000200017
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672005000200017
Keywords
calibration amazonia amazon pasture lbascience (general)

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