@Article{PaulinoMMWBMPTMMC:2018:InPaPe,
author = "Paulino, Igo and Moraes, Joyrles F. and Maranh{\~a}o, Gleuson L.
and Wrasse, Cristiano Max and Buriti, Ricardo Arlen and Medeiros,
Amauri F. and Paulino, Ana Roberta and Takahashi, Hisao and
Makela, Jonathan J. and Meriwether, John W. and Campos, Jos{\'e}
Andr{\'e} V.",
affiliation = "{Universidade Federal de Campina Grande (UFCG)} and {Universidade
Federal de Campina Grande (UFCG)} and {Universidade Federal de
Campina Grande (UFCG)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Universidade Federal de Campina Grande
(UFCG)} and {Universidade Federal de Campina Grande (UFCG)} and
{Universidade Federal de Campina Grande (UFCG)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {University of
Illinois} and {Clemson University} and {Universidade Federal de
Campina Grande (UFCG)}",
title = "Intrinsic parameters of periodic waves observed in the OI6300
airglow layer over the Brazilian equatorial region",
journal = "Annales Geophysicae",
year = "2018",
volume = "36",
number = "1",
pages = "265--273",
month = "Feb.",
keywords = "Meteorology and atmospheric dynamics (waves and tides).",
abstract = "Periodic waves were observed in the OI6300 airglow images over Sao
Joao do Cariri (36.5 degrees W, 7.4 degrees S) from 2012 to 2014
with simultaneous observations of the thermospheric wind using two
Fabry-Perot interferometers (FPIs). The FPIs measurements were
carried out at Sao Joao do Cariri and Cajazeiras (38.5 degrees W,
6.9 degrees S). The observed spectral characteristics of these
waves (period and wavelength) as well the propagation direction
were estimated using two-dimensional Fourier analysis in the
airglow images. The horizontal thermospheric wind was calculated
from the Doppler shift of the OI6300 data extracted from
interference fringes registered by the FPIs. Combining these two
techniques, the intrinsic parameters of the periodic waves were
estimated and analyzed. The spectral parameters of the periodic
waves were quite similar to the previous observations at Sao Joao
do Cariri. The intrinsic periods for most of the waves were
shorter than the observed periods, as a consequence, the intrinsic
phase speeds were faster compared to the observed phase speeds. As
a consequence, these waves can easily propagate into the
thermosphere-ionosphere since the fast gravity waves can skip
turning and critical levels. The strength and direction of the
wind vector in the thermosphere must be the main cause for the
observed anisotropy in the propagation direction of the periodic
waves, even if the sources of these waves are assumed to be
isotropic.",
doi = "10.5194/angeo-36-265-2018",
url = "http://dx.doi.org/10.5194/angeo-36-265-2018",
issn = "0992-7689",
language = "en",
targetfile = "paulino_intrinsic.pdf",
urlaccessdate = "15 jun. 2024"
}