@Article{PorfirioSouzLyraMari:2012:AsGlUV,
               author = "Porfirio, Anthony Carlos Silva and De Souza, Jos{\'e} Leonaldo 
                         and Lyra, Gustavo Bastos and Maringolo Lemes, Marco Antonio",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "An assessment of the global UV solar radiation under various sky 
                         conditions in Macei{\'o}-Northeastern Brazil",
              journal = "Energy",
                 year = "2012",
               volume = "44",
               number = "1",
                pages = "584--592",
             keywords = "UV solar radiation, global solar radiation, global atmospheric 
                         transmittance, UV fraction, Macei{\'o}, Brazil.",
             abstract = "The first observations of UV (290-400 nm) ever made at an 
                         agro-meteorological/radiometric station located in the 
                         metropolitan region of Macei{\'o} (9280S, 35490W, 127 m), 
                         Northeast Brazil, during 2008 are reported in this work. Solar UV 
                         radiation variability in different time scales and its fractional 
                         composition in the global solar radiation (G), that is, FUV = UV/G 
                         is investigated under different sky conditions. The maximum daily 
                         UV solar irradiation (HdUV) was 0.85 MJ m2 and the annual average 
                         0.55 MJ m2. It was noticed that the largest contribution to the 
                         annual variation of the daily totals of UV are attributed to 
                         cloudiness than seasonality. Under partially cloudy sky, multi 
                         reflection was responsible for an increase of 11.1 and 18.8% in 
                         the UV levels, relatively to clear days. FUV is inversely 
                         proportional to the global atmospheric transmittance (KT); the 
                         daily percentage variation of FUV was in the range of 2.33 to 
                         2.95% in clear days and from 2.60 to 3.59% in cloudy days, with 
                         the annual daily average value of 2.8%. Linear empirical relations 
                         between the UV and G components for hourly and daily intervals 
                         under different KT intervals were established and recommended, 
                         with the coefficient of determination (R2) generally above 0.91.",
                  doi = "10.1016/j.energy.2012.05.042",
                  url = "http://dx.doi.org/10.1016/j.energy.2012.05.042",
                 issn = "0360-5442",
                label = "lattes: 4908831099001125 1 PorfirioSouzLyraMari:2012:AsGlUV",
             language = "en",
        urlaccessdate = "30 abr. 2024"
}