@Article{AndrioliXBPMSTYJWL:2021:SiObSp,
               author = "Andrioli, Vania F{\'a}tima and Xu, Jiyao and Batista, Paulo Prado 
                         and Pimenta, Alexandre Alvares and Martins, Maria Paulete Pereira 
                         and Savio, Siomel and Targon, Cristiane Godoy and Yang, G. and 
                         Jiao, J. and Wang, C. and Liu, Z.",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {State Key 
                         Laboratory of Space Weather} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {State Key Laboratory 
                         of Space Weather} and {State Key Laboratory of Space Weather} and 
                         {State Key Laboratory of Space Weather} and {State Key Laboratory 
                         of Space Weather}",
                title = "Simultaneous Observation of Sporadic Potassium and Sodium Layers 
                         Over S{\~a}o Jos{\'e} dos Campos, Brazil (23.1°S, 45.9°W)",
              journal = "Journal of Geophysical Research: Space Physics",
                 year = "2021",
               volume = "126",
               number = "5",
                pages = "1--11",
                 note = "{Setores de Atividade: Pesquisa e desenvolvimento 
                         cient{\'{\i}}fico.}",
             abstract = "Sporadic potassium (Ks) and sodium (Nas) layers were investigated 
                         using more than 1,500h of simultaneous Na/K LIDAR data at S{\~a}o 
                         Jos{\'e} dos Campos, Brazil (23.1°S, 45.9°W). These events were 
                         observed on more than 88% of the analyzed nights. Although Na and 
                         K are both alkali metals, their sporadic layers show different 
                         behaviors. The Nas layers were in general 0.7km wider and occurred 
                         ~2km higher than Ks layers. Moreover, the Nas layers progression 
                         is faster than that of Ks layers not only in the process of 
                         reaching their maximum amplitude but also in terms of dissipation. 
                         Our study showed that most Ns events (80% of Ks layers and 90% of 
                         Nas layers) have a strength factor of upto 5. Moreover, on 
                         average, Ks presented a strength factor ~1.3 times stronger than 
                         that of Nas. The relative frequency of occurrence for both Ks and 
                         Nas layers exhibits an almost semiannual variation, with maxima in 
                         January/October and February/September, respectively. On the other 
                         hand, no similar variation was observed in the peak density or in 
                         the peak height. The peak density shows an annual variation, with 
                         a maximum occurring during winter for Ks events and a semiannual 
                         variation with a maxima occurring at the equinoxes for Nas. 
                         Different seasonal behaviors were also seen in the peak height of 
                         the identified layers, with Ks presenting a semiannual variation 
                         with maxima around January/October, while an annual variation 
                         occurred in Nas with lower layers occurring around winter.",
                  doi = "10.1029/2020JA028890",
                  url = "http://dx.doi.org/10.1029/2020JA028890",
                 issn = "2169-9402",
                label = "lattes: 0505792868023399 5 AndrioliXBPMSTYJWL:2021:SiObSp",
             language = "en",
           targetfile = "andrioli_simultaneous.pdf",
        urlaccessdate = "01 maio 2024"
}