The ultra-fast Kelvin waves in the equatorial ionosphere: observations and modeling

Autor(es)

Onohara, A. N. ^[1] ; Batista, I. S. ^[1] ; Takahashi, H. ^[1]

Afiliação do(s) autor(es)

^[1] Inst Nacl Pesquisas Espaciais, Aeron Div, BR-12201 Sao Jose Dos Campos - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Annales Geophysicae; v. 31, n. 2, p. 209-215, 2013.
• Citações Web of Science: 7

Resumo

The main purpose of this study is to investigate the vertical coupling between the mesosphere and lower thermosphere (MLT) region and the ionosphere through ultra-fast Kelvin (UFK) waves in the equatorial atmosphere. The effect of UFK waves on the ionospheric parameters was estimated using an ionospheric model which calculates electrostatic potential in the E-region and solves coupled electrodynamics of the equatorial ionosphere in the E- and F-regions. The UFK wave was observed in the South American equatorial region during February-March 2005. The MLT wind data obtained by meteor radar at Sao Joao do Cariri (7.5 degrees S, 37.5 degrees W) and ionospheric F-layer bottom height (h'F) observed by ionosonde at Fortaleza (3.9 degrees S; 38.4 degrees W) were used in order to calculate the wave characteristics and amplitude of oscillation. The simulation results showed that the combined electrodynamical effect of tides and UFK waves in the MLT region could explain the oscillations observed in the ionospheric parameters. (AU)

• Processo FAPESP: 11/11071-0 - Estudo e caracterização da estrutura longitudinal de quatro picos presente em observações da anomalia equatorial de ionização realizadas por satélite
• Beneficiário: Amelia Naomi Onohara
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado