@Article{AbduBaBrMaSaSoSo:2010:CoObDa,
               author = "Abdu, M. A. and Batista, I. S. and Brum, C. G. M. and MacDougal, 
                         J. W. and Santos, A. M. and Souza, J. R. de and Sobra, J. H. A.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and National Astronomy and 
                         Ionosphere Center, Space and Atmospheric Science Department, 
                         Arecibo Observatory, Puerto Rico and Department of Physics and 
                         Astronomy, The University of Western Ontario, London, Ontario, 
                         Canada and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "Solar Flux Effects on the Equatorial Evening Vertical Drift and 
                         Meridional Winds over Brazil: A Comparison Between Observational 
                         Data and the IRI Model and the HWM Representations",
              journal = "Advances in Space Research",
                 year = "2010",
               volume = "46",
               number = "8",
                pages = "1078–1085",
             keywords = "Equatorial ionosphere, meridional winds, Prereversal vertical 
                         drift, Equatorial electric fields, Solar flux dependence of Vz.",
             abstract = "We present the results of a study of the equatorial evening F 
                         region prereversal vertical drift enhancement over Brazil as a 
                         function of solar flux (F10.7). The vertical drift is measured 
                         from true heights obtained from digisondes operated at an 
                         equatorial site, Sao Luis, and at an off equatorial site, 
                         Fortaleza. The different magnetic inclinations of the two sites 
                         causes different degree of dependence of the vertical drift on 
                         magnetic meridional winds permitting an evaluation of the solar 
                         flux control on both the evening vertical drift (zonal electric 
                         field) and meridional winds. The analysis period covers the year 
                         2001 and 2004 during which the monthly mean F10.7 varied from 245 
                         to 80. The solar flux dependence of the vertical drift and the 
                         evening F layer as obtained from the data are compared with the 
                         representation of such dependence in the IRI model. While the IRI 
                         description of such dependence appears comparable to that is 
                         determined from observational data there is significant difference 
                         between the drift values in the two cases, the IRI representation 
                         being an underestimation of the observed drift for all flux 
                         values. The results are discussed from the perspective of 
                         validating the IRI model representations of the vertical drift. 
                         The results of the study also shows that the HWM description of 
                         the evening meridional wind in the Brazilian sector, shows 
                         agreement with observation for lower F10.7 values, while it 
                         significantly deviates from the observed/calculated meridional 
                         wind for higher solar flux values.",
                  doi = "10.1016/j.asr.2010.06.009",
                  url = "http://dx.doi.org/10.1016/j.asr.2010.06.009",
                 issn = "0273-1177",
             language = "en",
           targetfile = "abdu.pdf",
        urlaccessdate = "08 maio 2024"
}