@InProceedings{EgitoBuriMedeTaka:2017:34DaUl,
author = "Egito, F{\'a}bio and Buriti, Ricardo A. and Medeiros, Amauri
Fragoso de and Takahashi, Hisao",
affiliation = "{Universidade Federal do Oeste da Bahia (UFOB)} and {Universidade
Federal de Campina Grande (UFCG)} and {Universidade Federal de
Campina Grande (UFCG)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "The 3-4 day Ultra-Fast Kelvin wave (UFKW) induced airglow and MLT
wind variability and its possible interaction with diurnal tide
over the Brazilian equatorial region",
year = "2017",
organization = "International Congress of the Brazilian Geophysical Sociey, 15.",
abstract = "Airglow and wind measurements from the Brazilian equatorial region
have been used to investigate the presence and the effects of the
3-4 day Ultra-Fast Kelvin Wave in the MLT. Airglow data came from
a multichannel photometer, which measures the OI5577, O2b(0-1) and
OH(6-2) airglow integrated intensities and the OH rotational
temperature. Wind measurements were performed by a meteor radar,
which provides zonal and meridional wind between 80 and 100 km
altitude. Both instruments are installed at S{\~a}o Jo{\~a}o do
Cariri (7.4°S, 36.5°W) and provided quasi-simultaneous data in
2005. The results show that the 3-4 day oscillations appear
intermittently along the year in both airglow and wind. The 3-4
day oscillations compatible with Ultra-fast Kelvin wave were
observed simultaneously in both airglow and wind in March, August
and October/November. Ultra-fast Kelvin wave induced amplitudes in
the airglow overcome 40% in OI5577 and O2b(0-1) emissions, while
in OH(6-2) emission the amplitudes range from 15 to 20%. In the
temperature, amplitudes were near 3 K. The presence of the 3-4 day
oscillation in the airglow seems to be affected by the local time
of the measurements, which occurred particularly in OI5577
emission. It was observed that taking pre-midnight airglow data
could hide the presence of 3-4 day oscillation. Such feature is
related to the interaction between the Ultra-Fast Kelvin Wave and
the diurnal tide, which is indicated by a modulation of the
diurnal tide amplitude in the zonal wind at the period of the
Ultra-Fast Kelvin Wave.",
conference-location = "Rio de Janeiro, RJ",
conference-year = "31 jul. - 03 ago.",
language = "en",
targetfile = "Egito_the.pdf",
urlaccessdate = "18 mar. 2024"
}