@Article{EgitoBuriMedeTaka:2018:UlKeWa,
author = "Egito, F{\'a}bio and Buriti, Ricardo Arlen and Medeiros, Amauri
Fragoso and Takahashi, Hisao",
affiliation = "{Universidade Federal do Rec{\^o}ncavo da Bahia (UFRB)} and
{Universidade Federal de Campina Grande (UFCG)} and {Universidade
Federal de Campina Grande (UFCG)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)}",
title = "Ultrafast Kelvin waves in the MLT airglow and wind, and their
interaction with the atmospheric tides",
journal = "Annales Geophysicae",
year = "2018",
volume = "36",
number = "1",
pages = "231--241",
month = "Feb.",
keywords = "Atmospheric composition and structure (air-glow and aurora),
meteorology and atmospheric dynamics, middle atmosphere dynamics,
waves and tides.",
abstract = "Airglow and wind measurements from the Brazilian equatorial region
were used to investigate the presence and the effects of the
3-4-day ultrafast Kelvin waves in the MLT. The airglow integrated
intensities of the OI557.7 nm, O2b(0-1) and OH(6-2) emissions, as
well as the OH rotational temperature, were measured by a
multichannel photometer, and the zonal and meridional wind
components between 80 and 100 km were obtained from a meteor
radar. Both instruments are installed in the Brazilian equatorial
region at Sao Joao do Cariri (7.4 degrees S, 36.5 degrees W). Data
from 2005 were used in this study. The 3-4-day oscillations appear
intermittently throughout the year in the airglow. They were
identified in January, March, July, August and October-November
observations. The amplitudes induced by the waves in the airglow
range from 26 to 40% in the OI557.7 nm, 17 to 43% in the O2b(0-1)
and 15 to 20% in the OH(6-2) emissions. In the OH rotational
temperature, the amplitudes were from 4 to 6 K. Common 3-4-day
oscillations between airglow and neutral wind compatible with
ultrafast Kelvin waves were observed in March, August and
October-November. In these cases, the amplitudes in the zonal wind
were found to be between 22 and 28ms(-1) and the vertical
wavelength ranges from 44 to 62 km. Evidence of the nonlinear
interaction between the ultrafast Kelvin wave and diurnal tide was
observed.",
doi = "10.5194/angeo-36-231-2018",
url = "http://dx.doi.org/10.5194/angeo-36-231-2018",
issn = "0992-7689",
language = "en",
targetfile = "egito_ultrafast.pdf",
urlaccessdate = "02 maio 2024"
}