@Article{SilvaSouz:2013:GrMeLo,
               author = "Silva, Abel Antonio da and Souza Echer, Mariza Pereira de",
          affiliation = "Instituto de Estudos Avanc¸ados, Rod. dos Tamoios km 5.5, Torra˜o 
                         de Ouro II, Sa˜o Jose´ dos Campos, SP and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Ground-based measurements of local cloud cover",
              journal = "Meteorology and Atmospheric Physics",
                 year = "2013",
               volume = "120",
                pages = "201--212",
             keywords = "cloud, climate.",
             abstract = "Clouds are believed to reflect temporal climate changes through 
                         variations in their amounts, characteristics, and occurrence. In 
                         addition, they reflect both weather and climate in a region. In 
                         this work, a methodology to determine the local cloud cover (LCC) 
                         is proposed using sky images obtained from a ground-based 
                         instrument. Three years of sky images from an urban, tropical site 
                         were obtained and analyzed through that methodology. Monthly 
                         average LCC varied from 3 to 96 %, while seasonal average values 
                         were 68 % for summer, 54 % for spring, 46 % for fall, and 23 % for 
                         winter. LCC results show a clear seasonal dependence and a fair 
                         agreement (r2 = 0.72) with satellite data, which typically 
                         underestimate the cloud cover in relation to LCC. Our analysis 
                         also suggests the possibility of a measurable link between LCC and 
                         natural events like the El Nino Southern Oscillation.",
                  doi = "10.1007/s00703-013-0245-9",
                  url = "http://dx.doi.org/10.1007/s00703-013-0245-9",
                 issn = "0177-7971",
                label = "lattes: 5690147684647144 2 SilvaSouz:2013:GrMeLo",
             language = "en",
        urlaccessdate = "27 abr. 2024"
}