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		<doi>10.1016/j.jastp.2017.02.001</doi>
		<issn>1364-6826</issn>
		<citationkey>AraújoLimaJacoBati:2017:QuOsSi</citationkey>
		<title>Quasi-biennial oscillation signatures in the diurnal tidal winds over Cachoeira Paulista, Brazil</title>
		<year>2017</year>
		<month>Mar.</month>
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		<author>Araújo, Luciana Rodrigues de,</author>
		<author>Lima, Lourivaldo Mota,</author>
		<author>Jacobi, Christoph,</author>
		<author>Batista, Paulo Prado,</author>
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		<group>DIDAE-CGCEA-INPE-MCTIC-GOV-BR</group>
		<affiliation>Universidade Estadual da Paraíba (UEPB)</affiliation>
		<affiliation>Universidade Estadual da Paraíba (UEPB)</affiliation>
		<affiliation>Leipzig University</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<electronicmailaddress>lucianarodriggues@uol.com.br</electronicmailaddress>
		<electronicmailaddress>lourivaldo_mota@yahoo.com.br</electronicmailaddress>
		<electronicmailaddress>jacobi@uni-leipzig.de</electronicmailaddress>
		<electronicmailaddress>paulo.batista@inpe.br</electronicmailaddress>
		<journal>Journal of Atmospheric and Solar-Terrestrial Physics</journal>
		<volume>155</volume>
		<pages>71-78</pages>
		<secondarymark>A1_ENGENHARIAS_I A2_GEOCIÊNCIAS A2_ENGENHARIAS_III B1_INTERDISCIPLINAR B1_ENGENHARIAS_IV B1_BIODIVERSIDADE B2_ASTRONOMIA_/_FÍSICA C_CIÊNCIAS_BIOLÓGICAS_I</secondarymark>
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		<keywords>Diurnal tides, MLT winds, QBO, Solar cycle.</keywords>
		<abstract>Mesosphere/lower thermosphere winds obtained by meteor radar over Cachoeira Paulista (22.7° S, 45.0° W), Brazil, have been used to investigate the interannual variability of the diurnal tidal (DT) wind amplitude. The monthly DT displays year to year variations and their amplitudes are strongest during the westerly phase of the quasi-biennial oscillation (QBO) at the 30 hPa level. This can be observed in all seasons in the meridional component, whilst in the zonal component the signal is clearer during austral autumn, when the diurnal tide is strongest in this latitude. The spectrum obtained from the deseasonalized amplitudes shows a peak near 26 months in the meridional component, which can be associated to the stratospheric QBO. The QBO modulation of the DT amplitude shows a quasi-decadal variation, and it is stronger during the maximum of the solar cycle.</abstract>
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		<language>en</language>
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