Mensuração do fluxo de calor sensível na Cidade Universitária - Ilha do Fundão/RJ com um cintilômetro de larga abertura: estudo de caso para o dia 29 de setembro de 2016

This paper describes the use of a wide aperture scintillation as a major potential tool to estimate the sensible heat flux (H) on heterogeneous paths over complex surfaces and as well as a data source for validation of surface energy balance (SEB) algorithms, widely used in remote sensing, over urban and rural surfaces. The methodology applied for estimating the sensible heat flux (H) is derived from atmospheric refractivity and turbulence theories, associated with mean values of meteorological variables. We present a first evaluation of the observations collected during the case study of September 29/2016 for the mean H observed during post-frontal conditions observed along 825 m path defined 48 m above the surface of the UFRJ campus, located in the Metropolitan Area of Rio de Janeiro (MARJ), State of Rio de Janeiro, Brazil. The results demonstrate the potential use of a scintillometer for the continuous daily measurements of sensible heat flux behavior representative of large paths on complex heterogeneous land-cover surfaces, such as the ones usually found in urban areas. In addition, this work confirms the importance of the use of the scintillometer during research field campaigns in hydrology, meteorology and engineering commonly interested and focused on water and energy surface budgets.