@Article{FigueiredoTaWrOtShSi:2018:MoPrDi,
author = "Figueiredo, Cosme Alexandre Oliveira Barros and Takahashi, Hisao
and Wrasse, Cristiano Max and Otsuka, Yuichi and Shiokawa, Kazuo
and Silva, Diego Barros",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Nagoya University} and {Nagoya
University} and {Instituto Nacional de Pesquisas Espaciais
(INPE)}",
title = "Investigation of nighttime MSTIDS observed by optical thermosphere
imagers at Low Latitudes: morphology, propagation direction, and
wind filtering",
journal = "Journal of Geophysical Research: Space Physics",
year = "2018",
volume = "123",
number = "9",
pages = "7843--7857",
month = "Sept",
keywords = "Gravity waves, TIDs, MSTIDs, Ionoshere, Thermosphere, Airglow
images.",
abstract = "Different types of medium-scale traveling ionospheric disturbances
(MSTIDs) have been observed at Cachoeira Paulista (22.4 degrees S;
45.0 degrees W), Brazil, from June 2013 to December 2015, using
airglow OI 630.0-nm images. During the period, 58 MSTIDs were
identified and classified as follows: dark band MSTIDs (around 10
events) and periodic MSTIDs (48 events). Dark band MSTIDs present
phase velocity between 50 and 200m/s and propagation direction to
northwestward. On the other hand, periodic MSTIDs have phase
velocity of 50 to 200 m/s, horizontal wavelengths from 80 to 160
km, periods ranging between 5 and 45 min, and propagation
directions are mainly north-northeastward. The wave parameters
indicate that periodic MSTIDs have different characteristics when
compared to dark band MSTIDs, suggesting that periodic MSTIDs are
not generated through the well-known Perkins and E-F coupling
instability. In addition to it, the present study indicates that
the spectral characteristics found in Brazil are different from
other regions such as Japan and Indonesia. Therefore, we intend to
do the statistics of the wave parameters (wavelength, phase
velocity, period, propagation direction, and time occurrence) and
investigate the generation mechanisms of periodic MSTIDs at low to
middle latitude for the first time. Furthermore, the anisotropy
observed in periodic MSTID propagation direction can be explained
by different mechanisms.",
doi = "10.1029/2018JA025438",
url = "http://dx.doi.org/10.1029/2018JA025438",
issn = "2169-9402",
language = "en",
targetfile = "Figueiredo_investigation.pdf",
urlaccessdate = "27 abr. 2024"
}