@Article{FagundesAbBiSaFrPiLi:2009:2.TrPl,
               author = "Fagundes, Paulo Roberto and Abalde, Jose Ricardo and Bittencourt, 
                         Jos{\'e} Augusto and Sahai, Yogeshwar and Francisco, Rosalia 
                         Gomes and Pillat, Valdir Gil and Lima, Washington Lima C.",
          affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and 
                         {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {Universidade do Vale do 
                         Para{\'{\i}}ba (UNIVAP)} and {Universidade do Vale do 
                         Para{\'{\i}}ba (UNIVAP)} and {Centro Universit{\'a}rio Luterano 
                         de Palma}",
                title = "F layer postsunset height rise due to electric field prereversal 
                         enhancement: 2. Traveling planetary wave ionospheric disturbances 
                         and their role on the generation of equatorial spread F",
              journal = "Journal of Geophysical Research",
                 year = "2009",
               volume = "114",
               number = "A12322",
                month = "Dec.",
             keywords = "region plasma depletions, to-day variability, onset conditions, 
                         solar-activity, gravity-wave, bubbles, signatures, NM, 
                         mesosphere.",
             abstract = "This paper investigates the role played by traveling planetary 
                         wave ionospheric disturbances (TPWIDs) on the modulation of the 
                         electric field prereversal enhancement (PRE) amplitude, 
                         near-sunset hours, in the equatorial ionosphere, and their 
                         influence on the day-to-day equatorial spread F (ESF) variability. 
                         We show that {"}fresh'' (ESF) day-to-day variability is closely 
                         related with the postsunset height rise due to the electric field 
                         PRE, and there is some indication that the altitude of 300 km may 
                         be a threshold height for the generation of fresh ESF. 
                         Observations of F layer virtual heights during evening hours (1800 
                         LT, 1900 LT, and 2000 LT) present a strong day-to-day variability, 
                         even during geomagnetically quiet periods. In fact, this 
                         well-organized variability is induced by TPWIDs-type oscillations 
                         that push the F layer up or down according to the TPWID phase. The 
                         preliminary analysis presented here show that, when the planetary 
                         TPWID oscillations or geomagnetic activity raises the F layer 
                         around sunset hours, the occurrence of fresh ESF is increased, but 
                         when the TPWID-type oscillations or geomagnetic activity pushes 
                         the F layer downward, the fresh ESF occurrence is reduced. Also, 
                         the TPWID phase modulated the onset time of the fresh ESF during 
                         high fresh ESF season. The modulation acts in such way that, when 
                         the TPWID phase maximizes, the fresh ESF onset time occurs earlier 
                         than when the TPWID phase minimizes and the fresh ESF onset time 
                         occurs later.",
                  doi = "10.1029/2009JA014482",
                  url = "http://dx.doi.org/10.1029/2009JA014482",
                 issn = "0148-0227",
                label = "lattes: 1106857072073407 6 FagundesAbBiSaFrPiLi:2009:PAIITR",
             language = "en",
        urlaccessdate = "04 maio 2024"
}