@Article{MedeirosBuMaTaBaGoTa:2004:CoGrWa,
author = "Medeiros, Amauri Fragoso de and Buriti, R A and Machado, E A and
Takahashi, Hisao and Batista, Paulo Prado and Gobbi, Delano and
Taylor, M J",
affiliation = "Universidade Federal de Campina Grande, Departamento de
F{\'{\i}}sica and INPE and Space Dynamics Laboratory and Physics
Department, Utah State University",
title = "Comparison of gravity wave activity observed by airglow imaging at
two different latitudes in Brazil",
journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
year = "2004",
volume = "66",
number = "6-9",
pages = "647--654",
month = "Apr-Jun.",
keywords = "Gravity wave, airglow, imager, winds.",
abstract = "An all-sky CCD imager for the OH, O2 and OI (557.7 nm) airglow
emissions was operated at Cachoeira Paulista (CP), Brazil (23 S,
45 W), in collaboration with Utah State University, USA, during
the period of 1998-2000. Another all-sky imager, which belongs to
the Instituto Nacional de Pesquisas Espaciais, has been operating
at S{\~a}o Jo{\~a}o do Cariri (Cariri), Brazil (7 S, 36 W) since
October 2000. Dominant gravity wave components were investigated
by using the image data from the two sites. Wave characteristics
observed at CP (October 1998-September 1999) show horizontal
wavelenghts of 5-60 km, periods of 5-35 min and horizontal phase
velocities of 1-80 m/s. Band-type waves (horizontal wavelenghts
between 10 and 85 km) showed a clear seasonal dependeney in the
horizontal propagation direction, propagating to the southeast in
summer and to the northwest in winter. The Cariri data (September
2000-August 2001) showed horizontal wavelenghts of 5-65 km, with
periods of 5-55 min and horizontal phase velocities of 5-105 m/s,
much higher than CP. Band-type waves also exhibited a seasonal
dependency in the horizontal propagation direction, propagation to
southeast in summer and northeast in winter.The results are
interpreted in terms of wind filtering and a non-uniform
distribution of the gravity wave sources.",
copyholder = "SID/SCD",
isbn/issn = "1364-6826",
issn = "1364-6826",
language = "en",
targetfile = "comparison of gravity.pdf",
urlaccessdate = "03 maio 2024"
}