@Article{AraújoLimaBatiJaco:2020:BeMoTi,
author = "Ara{\'u}jo, Luciana Rodrigues de and Lima, Lourivaldo Mota and
Batista, Paulo Prado and Jacobi, Christoph",
affiliation = "{Universidade Estadual da Para{\'{\i}}ba (UEPB)} and
{Universidade Estadual da Para{\'{\i}}ba (UEPB)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Universit{\"a}t
Leipzig}",
title = "Behaviour of monthly tides from meteor radar winds at 22.7ºS
during declining phases of 23 and 24 solar cycles",
journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
year = "2020",
volume = "205",
pages = "e105298",
month = "Sept.",
keywords = "Tides, Solar Cycle, Quasi-Biennial Oscillation (QBO).",
abstract = "Atmospheric tides dominate the mesosphere and lower thermosphere
(MLT) dynamics and show seasonal, interannual as well as long term
variability. In the present study, MLT wind data obtained between
1999 and 2019 from meteor radar observations at Cachoeira Paulista
(22.7\∘S, 45.0\∘W), Brazil, have been used to
investigate similarities and differences in the diurnal,
semidiurnal and terdiurnal tide amplitudes during the declining
phases of solar cycles 23 and 24. The equinoctial peaks of the
terdiurnal and semidiurnal tide amplitudes decay from solar
maximum to solar minimum, while diurnal tide amplitudes present
high variability, but no obvious long-term trend or decadal
variability. The deseasonalized MLT terdiurnal and semidiurnal
tidal amplitudes show higher positive correlation with solar
activity during solar cycle 24 (\ρ=0.97 and 0.90) than
during solar cycle 23 (\ρ=0.85 and 0.67) and an
insignificant correlation with the quasi-biennial oscillation
(QBO), during both solar cycles, in disagreement to some results
reported in the literature. The deseasonalized MLT diurnal tidal
amplitudes show QBO signals whose amplitudes decrease with solar
activity during the declining phase of solar cycle 23, suggesting
a modulation of the QBO amplitude of the MLT diurnal tide by solar
activity. However, in contrast to solar cycle 23, quasi-biennial
amplitudes of the diurnal tide increase during the declining phase
of the very weak solar cycle 24.",
doi = "10.1016/j.jastp.2020.105298",
url = "http://dx.doi.org/10.1016/j.jastp.2020.105298",
issn = "1364-6826",
language = "en",
targetfile = "araujo_behavior.pdf",
urlaccessdate = "09 maio 2024"
}