MACHADO, E. A.; http://lattes.cnpq.br/1432805467793494; MACHADO, Elialdo Andriola.
Résumé:
The goal of this work consist in determining physical parameters of short
period gravity waves detected by an all-sky imager at S. J do Cariri, an
equatorial site. The OH airglow data were collected from September 2000 to
August 2001, except on March 2001 when the imager presented electronic
problem. In order to obtain a picture about these waves detected at S. J do
Cariri (7°S, 36°W), a comparison between this site and Cachoeira Paulista, SP
(23.5°S, 45°W) (hereafter CP) was made. Physical parameters, such as:
horizontal phase velocity and direction of propagation, observed period and
horizontal wavelength, were determined through a sequence of imager. The
waves detected at S. J do Cariri presented some differences in comparison
with those ones detected at CP. The number of ripples detected at S. J do
Cariri, e.g., was larger than that one observed at CP. On the other hand, the
number of detected band at S. J do Cariri was smaller than that one observed
at CP. At Cariri, on average, the direction of propagation presented a seasonal
behavior and the phase velocity detected was bigger than at CP. The
horizontal wavelength and observe period detected at S. J do Cariri ranged
from 5 to 60 km and 5 to 60 minute, respectively.
