@Article{RigozoEchEvaNorEch:2011:PrSuNu,
               author = "Rigozo, N. R. and Echer, M. P. Souza and Evangelista, H. and 
                         Nordemann, D. J. R. and Echer, E.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Laborato´rio de 
                         Radioecologia e Mudanc-as Globais / Departamento de Biof{\'y}} 
                         and {´sica e Biometria da Universidade do Estado do Rio de 
                         Janeiro} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Prediction of sunspot number amplitude and solar cycle length for 
                         cycles 24 and 25",
              journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
                 year = "2011",
               volume = "73",
               number = "11-12",
                pages = "1294--1299",
                month = "Jul",
             keywords = "Prediction solar activity Sunspot number time series Spectral 
                         analysis Multiresolution analysis.",
             abstract = "The prediction of solar activity strength for solar cycles 24 and 
                         25 is made on the basis of extrapolation of sunspot number 
                         spectral components. Monthly sunspot number data during the 
                         18502007 interval (solar cycles 923) are decomposed into several 
                         levels and searched for periodicities by iterative regression in 
                         each level. For solar cycle 24, the peak is predicted in November 
                         2013 with a sunspot number of 113.3. The cycle is expected to be 
                         weak, with a length of 133 mo (months) or 11.1 yr. The sunspot 
                         number maximum in cycle 25 is predicted to occur in April 2023 
                         with a sunspot number 132.1 and a solar cycle length of 118 mo or 
                         9.8 yr. Thus, solar cycle 24 is predicted to have an intensity 23% 
                         lower than cycle 23, and cycle 25 will be 5% lower than cycle 
                         23.",
                  doi = "10.1016/j.jastp.2010.09.005",
                  url = "http://dx.doi.org/10.1016/j.jastp.2010.09.005",
                 issn = "1364-6826",
             language = "en",
           targetfile = "sdarticle.pdf",
        urlaccessdate = "05 maio 2024"
}