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%0 Journal Article
%4 sid.inpe.br/mtc-m21b/2017/03.03.13.01
%2 sid.inpe.br/mtc-m21b/2017/03.03.13.01.58
%@doi 10.1016/j.jastp.2017.02.001
%@issn 1364-6826
%T Quasi-biennial oscillation signatures in the diurnal tidal winds over Cachoeira Paulista, Brazil
%D 2017
%8 Mar.
%9 journal article
%A Araújo, Luciana Rodrigues de,
%A Lima, Lourivaldo Mota,
%A Jacobi, Christoph,
%A Batista, Paulo Prado,
%@affiliation Universidade Estadual da Paraíba (UEPB)
%@affiliation Universidade Estadual da Paraíba (UEPB)
%@affiliation Leipzig University
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@electronicmailaddress lucianarodriggues@uol.com.br
%@electronicmailaddress lourivaldo_mota@yahoo.com.br
%@electronicmailaddress jacobi@uni-leipzig.de
%@electronicmailaddress paulo.batista@inpe.br
%B Journal of Atmospheric and Solar-Terrestrial Physics
%V 155
%P 71-78
%K Diurnal tides, MLT winds, QBO, Solar cycle.
%X 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.
%@language en
%3 araujo_quasi.pdf


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