Por favor utiliza este link para citar o compartir este documento: http://repositoriodigital.academica.mx/jspui/handle/987654321/80105
Título: 3-4 day Kelvin waves observed in the MLT region at 7.4° S, Brazil
Palabras clave: Kelvin Waves
upper atmosphere
atmospheric dynamics
meteor radar
Fecha de publicación: 10-Jul-2012
Editorial: Geofísica internacional
Descripción: Meteor wind measurements obtained from São João do Cariri-PB (7.4° S, 36.5° W), Brazil, during 2005, have been used to examine the ultra-fast Kelvin wave characteristics in the mesopause and lower thermosphere region. The hourly winds were subjected to wavelet analysis and the results revealed the presence of 3-4 day oscillation in four episodes along the year. The observed parameters were used to check if the 3-4 days oscillations satisfy the dispersion relation for Kelvin waves. The results showed that only the oscillations that occurred in February-March and May-June (first and second events), are compatible with equatorial ultra-fast Kelvin wave propagation, with zonal wave number s=1. During these two events, the zonal wind amplitudes reached maximum values of 25 m/s and 20 m/s respectively. The vertical phase structure showed descending phase, compatible with ascending wave energy, and vertical wavelengths of about 40 km were found for both events.
Other Identifiers: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S0016-71692008000300003
Aparece en las Colecciones:Geofísica Internacional

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