CRUZ, S. S. A.; http://lattes.cnpq.br/5466267329327486; CRUZ, Suallyson Sômston Araújo da.
Résumé:
This study investigated the occurrence of atmospheric oscillations in the the Brazilian
equatorial region using wind, atmospheric pressure, and temperature data collected every
minute during 2023 by surface meteorological stations (EMS) at the airports of João Pessoa
(SBJP) and Campina Grande (SBKG). After data preprocessing, 80 days were selected
based on the occurrence of oscillatory patterns and spectral filtering and statistical analysis
were performed. Oscillations with periodicities between 1 and 7 hours were identified in
94% of these days. Considering simultaneity among the analyzed fields, 35 days (44.9%)
exhibited consistent and statistically significant oscillations. These events occurred more
frequently during the winter months, indicating a seasonal pattern that diverges from
the literature, which correlates the occurrences to warmer periods in the region. The
detected signals exhibited characteristics compatible with Easterly Wave Disturbances
(DOL) and fast gravity waves, with an east-west propagation pattern observed between the
two analyzed sites. The results reveal the occurrence of organized atmospheric oscillations
in the region with high correlations among pressure, temperature, and wind, suggesting a
local dynamic coupling of the atmosphere. These findings contribute to the understanding
of regional atmospheric variability and provide a foundation for future investigations into
the dynamics of atmospheric disturbances in tropical environments.
