Diurnal tide variability in the region between 80 and 100 km heigth over Cachoeira Paulista (22.7°S, 45°W) / Variabilidade de Maré diurna na região de 80-100 km de altitude sobre Cachoeira Paulista (22,7°S; 45°0)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Six year of data collected by a SkYmet meteor radar were used to study the tidal seasonal and the day-to-day variabilities. The tidal seasonal variability has a well known climatology and has been studied for long years. At contrary, the tidal day-to-day variability is not well known and its producing mechanisms are not completely explained. Probably this variability is the result of several mechanisms acting on the tide, among the mechanisms there is the gravity wave momentum deposition, non-linear interactions between diurnal and semidiurnal tides, non-linear interactions between diurnal tide and planetary waves, geomagnetic storms influences, and the interactions between migrating and non-migrating tides. All the mechanisms were investigated in this work, except the last, and was concluded that all the mechanisms studied contributed to tidal variability. The gravity wave momentum deposition contributed better to seasonal variability of diurnal tide and the interactions between tides and between diurnal tide and planetary wave contributed better to day-to-day variability.

ASSUNTO(S)

geofÍsica espacial space geophysics wind radar mesosfera radar meteórico meteor ventos marés atmosféricas meteoro radar atmospheric tides mesosphere

ACESSO AO ARTIGO

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