Estimativas do balanço de energia e fluxo de carbono por diferentes métodos em floresta de transição no Sudoeste da Amazônia

Detalhes bibliográficos
Ano de defesa: 2013
Autor(a) principal: Pereira, Osvaldo Alves
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Mato Grosso
Brasil
Instituto de Física (IF)
UFMT CUC - Cuiabá
Programa de Pós-Graduação em Física Ambiental
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://ri.ufmt.br/handle/1/2547
Resumo: This study aimed to compare the energy balance and CO2 flux by Eddy Covariance (EC), Bowen ratio (RB) and modified Bowen ratio (MBR) systems in transitional forest between the Cerrado and the Amazon rainforest. The experiment was conducted in an area belonging to the Maracaí Farm, about 50 km northwest of the city of Sinop, Mato Grosso, Brazil. To consider the closure of the energy balance, the coefficient of determination R2 was used. CO2 fluxes (Fc), latent heat (LE) and sensible (H) through the statistical test Scheirer-Ray-Hare to detect possible differences between the flows of LE, H and Fc between seasons, methods, and interactions between method and season. The CO2 flux, estimated by the MBR, was tested as a function of the diffusion coefficients of turbulent sensible heat ( ) and latent heat ( ). H showed a significant difference between the RB and EC methods and between the wet and dry seasons (p-value < 0.001). Differences between the CO2 fluxes by EC and RBM methods depending on , ( ) were not significant between seasons and between methods (p > 0.05). In both methods, RB and EC, the net energy available prioritized LE flux even during the dry season. The energy balance for EC was underestimated by approximately 30% in the wet season and 5% in the dry season. The energy balance method RB closed at 100% during the dry season, but during the wet season was underestimated by 4%.