A Sensitivity Analysis of the Nocturnal Boundary-Layer Properties to Atmospheric Emissivity Formulations |
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| Authors: | Mario B Siqueira Gabriel G Katul |
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| Institution: | 1.Departamento de Engenharia Mecanica,Universidade de Brasília,Brasília,Brazil;2.Nicholas School of the Environment and Earth Sciences,Duke University,Durham,USA;3.Department of Civil and Environmental Engineering, Pratt School of Engineering,Duke University,Durham,USA |
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| Abstract: | A one-dimensional model for the mean potential temperature within the nocturnal boundary layer (NBL) was used to assess the
sensitivity of three NBL properties (height, thermal stratification strength, and near-surface cooling) to three widely used
atmospheric emissivity formulations. The calculations revealed that the NBL height is robust to the choice of the emissivity
function, though this is not the case for NBL Richardson number and near-surface cooling rate. Rather than endorse one formulation,
our analysis highlights the importance of atmospheric emissivity in modelling the radiative properties of the NBL especially
for clear-sky conditions. |
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