@TechReport{AbduNelsBatiSobr:1985:DeEqFr,
               author = "Abdu, Mangalathayil Ali and Nelson, O. R. and Batista, Inez 
                         Staciarini and Sobral, Jos{\'e} Humberto Andrade",
                title = "Dependence of equatorial F-region plasma bubble rise velocity and 
                         dynamo electric field on solar cycle",
          institution = "INPE",
                 year = "1985",
                 type = "RPQ",
               number = "INPE-3439-PRE/696",
              address = "Sao Jose dos Campos",
                 note = "{This work was partially supported by the {"}Fundo Nacional de 
                         Desenvolvimento Cient{\'{\i}}fico e Tecnol{\'o}gico{"} under 
                         contract FINEP-537/CT.}",
             keywords = "plasma bubble rice velocity, F-region dynamo field, solar cycle 
                         dependence.",
             abstract = "Latitudinally spaced ionosonde observations of spread F events in 
                         a restricted longitude sector of the Brazilian equatorial region 
                         has enabled determinations of statistically reliable values for 
                         the transequatorial plasma bubble vertical rise velocity (as 
                         described by Abdu et al., 1983). Measurements carried out of this 
                         parameter and of the F-region ambient ionization vertical drift 
                         prereversal enhancement during the past few years, 1975-1976, 
                         1978-79 and 1980-81, show their significant dependence on sunspot 
                         cycle. Further, the spread F onset local times at the equatorial 
                         as well as at the low latitude locations are found to be delayed 
                         during low sunspot years as compared to high activity years. 
                         Implications of these results are discussed in the light of 
                         possible solar cycle changes in the F-region dynamo field 
                         intensity.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
           copyholder = "SID/SCD",
                label = "2554",
             language = "en",
                pages = "15",
                  ibi = "6qtX3pFwXQZ3r59YCT/GT3Bn",
                  url = "http://urlib.net/ibi/6qtX3pFwXQZ3r59YCT/GT3Bn",
           targetfile = "publicacao.pdf",
        urlaccessdate = "19 abr. 2024"
}