Dinâmica do fluxo de calor e temperatura do solo no Pantanal mato-grossense

• Ano de defesa: 2023
• Autor(a) principal: Costa, Rayanna de Oliveira
• 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
• Palavras-chave em Português: Propriedade térmica do solo; Condutividade térmica; Pantanal mato-grossense; CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA; Soil thermal property; Thermal conductivity
• Link de acesso: http://ri.ufmt.br/handle/1/5614

Among different types of ecosystems, wetlands stand out as one of the most ecologically valuable, yet they are also among the most impacted and at risk due to anthropogenic actions. Understanding hydrological variability in areas like the Pantanal aids in effective water resource management and the preservation of ecosystem services. Additionally, soil thermal properties play a crucial role in energy storage and transmission. Acquiring knowledge of these characteristics under specific conditions is pivotal for advancing the understanding of these phenomena. As a component of the surface energy balance, soil heat flux (G) holds a vital role, and its accurate assessment can significantly enhance energy balance estimates. However, precise measurement of G is often overlooked in energy balance studies. This study aims to investigate G dynamics and its thermal properties through a approximately 2- year time series, obtained experimentally in a soil north of the Pantanal region (Lat: 16°29'50" S and Lon: 56°24'50" W). Two distinct areas (sun-exposed and shaded) were analyzed, and their significant differences were studied. To estimate soil thermal conductivity (K), Fourier's law was applied in two different forms, based on the study areas' G, working with net heat flux (G_L) and mean heat flux (G_M). The estimated K values using these two methods were discussed, and it was observed that the differences between experimental results were minimal, suggesting that both methods are acceptable for estimating soil thermal conductivity.