| Full text | |
| Author(s): |
Dare-Idowu, Oluwakemi
[1, 2]
;
Paulino, Igo
[1]
;
Figueiredo, Cosme A. O. B.
[3]
;
Medeiros, Amauri F.
[1]
;
Buriti, Ricardo A.
[1]
;
Paulino, Ana Roberta
[1, 4]
;
Wrasse, Cristiano M.
[3]
Total Authors: 7
|
| Affiliation: | [1] Univ Fed Campina Grande, Unidade Acad Fis, Campina Grande, Paraiba - Brazil
[2] Univ Paul Sabatier, Ctr Etud Spatiales BIOsphere, UMR 5126, CNES, CNRS, IRD, Toulouse - France
[3] Inst Nacl Pesquisas Espaciais, Div Aeron, Sao Jose Dos Campos, SP - Brazil
[4] Univ Estadual Paraiba, Dept Fis, Campina Grande, Paraiba - Brazil
Total Affiliations: 4
|
| Document type: | Journal article |
| Source: | Annales Geophysicae; v. 38, n. 2, p. 507-516, APR 16 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
On 8 April 2005, strong gravity wave (GW) activity (over a period of more than 3 h) was observed in Sao Joao do Cariri (7.4 degrees S, 36.5 degrees W). These waves propagated to the southeast and presented different spectral characteristics (wavelength, period and phase speed). Using hydroxyl (OH) airglow images, the characteristics of the observed GWs were calculated; the wavelengths ranged between 90 and 150 km, the periods ranged from similar to 26 to 67 min and the phase speeds ranged from 32 to 71 m s(-1). A reverse ray-tracing analysis was performed to search for the possible sources of the waves that were detected. The ray-tracing database was composed of temperature profiles from the Naval Research Laboratory Mass Spectrometer Incoherent Scatter (NRLMSISE-00) model and SABER measurements as well as wind profiles from the Horizontal Wind Model (HWM) and meteor radar data. According to the ray tracing result, the likely source of these observed gravity waves was the Intertropical Convergence Zone, which caused intense convective processes to take place in the northern part of the observatory. Also, the observed preferential propagation direction of the waves to the southeast could be explained using blocking diagrams, i.e. due to the wind filtering process. (AU) | |
| FAPESP's process: | 18/09066-8 - TRAVELLING IONOSPHERIC DISTURBANCES OBSERVED BY DETRENDED TOTAL ELECTRON CONTENT MAPS/KEOGRAM OVER ANDES MOUNTAINS |
| Grantee: | Cosme Alexandre Oliveira Barros Figueiredo |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |