@Article{FerreiraLacaSobr:2001:PrAn,
               author = "Ferreira, Nelson Jesus and Lacava, C. I. V. and Sobral, Z. R.",
                title = "A climatological study of convective cloudbands in northeastern 
                         Brazil Part I: preliminary analysis",
              journal = "Australian Meteorological Magazine",
                 year = "2001",
               volume = "50",
               number = "2",
                pages = "105--113",
                month = "Jun.",
             keywords = "rainfall, anomalies, vortices.",
             abstract = "This work analyses the role of convective cloudbands (CCBs), 
                         associated with low-level convergence zones on the northeast 
                         region of Brazil (NE). A preliminary analysis of synoptic 
                         situations based on six years of meteorological satellite images 
                         and observed rainfall data for the region is presented. The 
                         results show two main patterns of CCBs. The first one classified 
                         as type A has a NW-SE orientation. It is associated with 
                         convergence zones due to cyclonic vortices or fronts, both 
                         rain-producing systems that reach mainly the southern, central and 
                         western regions of the NE. The second pattern (type S)results from 
                         interactions between frontal systems and upper-level cyclonic 
                         vortices over the Atlantic Ocean, to the east of the NE, as well 
                         as with the intertropical convergence zone (ITCZ). These frontal 
                         systems or convergence zones move northeastward and remain 
                         semistationary over the southeast coast of Brazil. The north-south 
                         orientation of these CCBs seems to be responsible for above 
                         average rainfall over the western and central parts of the NE. The 
                         type A cases are observed more frequently in October and November, 
                         while the type S cases are common in January, February and March. 
                         December is considered to be a transition month.",
                 issn = "0004-9743",
                label = "9767",
           targetfile = "ferreira.pdf",
        urlaccessdate = "02 maio 2024"
}