@Article{SrinivasaVadlPras:1998:ApWaTr,
               author = "Srinivasa, Rao Chapa and Vadlamudi, Brahmananda Rao and Prasad, G. 
                         S. S. D.",
          affiliation = "{CPTEC-INPE-Cachoeira Paulista-12630-000-SP-Brasil}",
                title = "Application of wavelet transform to Meteosat-derived cold cloud 
                         index data over South America",
              journal = "Monthly Weather Review",
                 year = "1998",
               volume = "126",
               number = "9",
                pages = "24--2481",
                month = "sep.",
             keywords = "tropical western pacific, convective activity, diurnal-variation, 
                         large-scale,oscillations, decomposition, hemisphere, dynamics, 
                         clusters, cycles.",
             abstract = "Cold cloud index (CCI) data derived from Meteosat infrared imagery 
                         are used to detect periodicities in convective activity in South 
                         America. The generally used Fourier transform (FT) cannot provide 
                         time-localized information but gives information on the average 
                         periodicity of oscillations over the entire time domain. As many 
                         events in the atmosphere are intermittent, wavelet transform (WT) 
                         is used to identify periodic events in CCI data. First, the Morlet 
                         WT is applied to different combinations of time series data of 
                         known periodicities to demonstrate the advantage of WT over FT. 
                         Later it is applied to CCI data over four 9 degrees square areas 
                         between the latitudes 4.5 degrees N and 31.5 degrees S, and 
                         longitudes 54 degrees-45 degrees W. Near the equator periodic 
                         convective activities are observed to be more prominent in the 
                         boreal summer than in the austral summer. Between the latitudes 
                         4.5 degrees and 22.5 degrees S, 1-: 2-3-, approximately 5-, and 
                         8-10-day oscillations are seen in the austral summer and seldom is 
                         any convective activity seen in the winter. In January semidiurnal 
                         variation of cloudiness is also observed for a few days. Farther 
                         south in the extratropics, approximately 10- and approximately 
                         20-day periodic events, which refer to the baroclinic waves, are 
                         seen more prominently in the austral autumn and winter, and 1- and 
                         approximately 5-day oscillations are seen in the summer, perhaps 
                         due to convective cloudiness.",
           copyholder = "SID/SCD",
                 issn = "0027-0644",
             language = "en",
           targetfile = "Srinivasa_Application of wavelet transform",
        urlaccessdate = "26 abr. 2024"
}