Signature of gravity wave propagations from the troposphere to ionosphere

Autor(es)

Takahashi, Hisao ; Figueiredo, Cosme A. O. B. ; Essien, Patrick ; Wrasse, Cristiano M. ; Barros, Diego ; Nyassor, Prosper K. ; Paulino, Igo ; Egito, Fabio ; Rosa, Geangelo M. ; Sampaio, Antonio H. R.

• Tipo de documento: Artigo Científico
• Fonte: Annales Geophysicae; v. 40, n. 6, p. 8-pg., 2022-12-01.

Resumo

We observed a gravity wave (GW) signature in the OH emission layer in the upper mesosphere, and 4 h later, a medium-scale travelling ionospheric disturbance (MSTID) in the OI 630 nm emission layer. Spectral analysis of the two waves showed that both have almost the same wave characteristics: wavelength, period, phase speed and propagation direction, respectively, 200 km, 60 min, 50 m s-1, toward the southeast. From the gravity wave ray-tracing simulation for the mesospheric gravity wave, we found that the wave came from a tropospheric deep convection spot and propagated up to the 140 km altitude. Regarding the same wave characteristics between mesospheric GW and ionospheric MSTID, the two possible cases are investigated: a direct influence of the GW oscillation in the OI 630 nm emission height and the generation of a secondary wave during the GW breaking process. This is the first time to report an observational event of gravity wave propagation from the troposphere, mesosphere to thermosphere-ionosphere in the South American region. (AU)

• Processo FAPESP: 18/09066-8 - Distúrbios ionosféricos propagantes observados sobre a cordilheira dos andes utilizando mapas/keogramas de conteúdo eletrônico total perturbado
• Beneficiário: Cosme Alexandre Oliveira Barros Figueiredo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 19/22548-4 - Fontes de distúrbios ionosféricos propagantes sobre a Cordilheira dos Andes
• Beneficiário: Cosme Alexandre Oliveira Barros Figueiredo
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado