Diurnal Evolution and Estimates of Hourly Diffuse Radiation Based on Horizontal Global Radiation, in Cerrado-Amazon Transition, Brazil
نویسندگان
چکیده
In the Cerrado-Amazonian ecotone in State of Mato Grosso, intensely altered by anthropic action, knowledge and processes energy conversion balance are still incipient, making monitoring modeling diffuse radiation essential for several applications. The objective this study was to evaluate seasonality diurnal evolution estimate hourly (Hdh) incident horizontal plane between June 2011 October 2016. instantaneous measurements (5 min) underwent geometric, astronomical, anisotropic corrections, with subsequent integrations. its radiometric fractions evaluated. estimates were made considering total seasonal data groupings (water stations region) different cloudiness classes (atmospheric transmissivity index—KTh). behavior similar that global at top atmosphere, maximum values solar noon. correlations Kdh KTh showed third-order polynomial behavior, observed ranging from 0.8 0.9, less than 0.2. Estimation equations based on underestimated radiation, a better performance presented models adjusted annual groupings. Among parameterized estimating obtained literature, those calibrated regionally study, together developed tropical regions, statistical performances.
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ژورنال
عنوان ژورنال: Atmosphere
سال: 2023
ISSN: ['2073-4433']
DOI: https://doi.org/10.3390/atmos14081289