@Article{GuharayBatiClem:2014:VaSeSc,
               author = "Guharay, Amitava and Batista, Paulo Prado and Clemesha, Barclay 
                         Robert",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "On the variability of the seasonal scale oscillations over 
                         Cachoeira Paulista (22.7°S, 45°W), Brazil",
              journal = "Earth, Planets and Space",
                 year = "2014",
               volume = "66",
               number = "1",
                pages = "45",
                 note = "{Setores de Atividade: Pesquisa e desenvolvimento 
                         cient{\'{\i}}fico.}",
             keywords = "seasonal oscillations, diurnal tide, quasi-2-day wave.",
             abstract = "The characteristics of long period atmospheric oscillations are 
                         studied using long-term meteor radar wind observations over a 
                         low-latitude Brazilian station, Cachoeira Paulista (22.7°S, 45°W). 
                         The semiannual oscillation (SAO) amplitude decreases gradually 
                         with altitude in the mesopause region, while the annual 
                         oscillation (AO) amplitude exhibits a minimum at mid-mesopause 
                         with significant interannual variability. The quasi-biennial 
                         oscillation (QBO) obtained by removing the SAO and AO from the 
                         zonal wind exhibits an out-of-phase relationship at lower 
                         mesopause heights (approximately 81 km) and mid-stratosphere 
                         (approximately 10 hPa). There is an evident signature of 
                         modulation of the mesospheric SAO (MSAO) and mesospheric AO (MAO) 
                         by the QBO. The diurnal tide is surmised to contribute 
                         significantly to drive the easterly phase of these oscillations, 
                         especially MSAO and MAO through depositing westward momentum to 
                         the background wind. The westerly phase of the MSAO is believed to 
                         support the growth of the quasi-2-day wave (QTDW) by wave 
                         filtering. The QTDW is found to be strong during the easterly 
                         phase of the MAO indicating a possible existence of the 
                         barotropic/baroclinic instability during summer and a possible 
                         role of the QTDW towards westward forcing of the background 
                         wind.",
                  doi = "10.1186/1880-5981-66-45",
                  url = "http://dx.doi.org/10.1186/1880-5981-66-45",
                 issn = "1343-8832",
                label = "lattes: 2306964700488382 2 GuharayBatiClem:2014:VaSeSc",
             language = "en",
           targetfile = "2014eps_GuharaySAOAO.pdf",
                  url = "http://www.earth-planets-space.com/content/66/1/45",
        urlaccessdate = "28 abr. 2024"
}