Simulations of blanketing sporadic E-layer over the Brazilian sector driven by tidal winds

Autor(es)

Araujo Resende, Laysa Cristina ; Batista, Inez Staciarini ; Denardini, Clezio Marcos ; Batista, Paulo Prado ; Carrasco, Alexander Jose ; Andrioli, Vania de Fatima ; Moro, Juliano

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS; v. 154, p. 104-114, FEB 2017.
• Citações Web of Science: 6

Resumo

This work presents new results about simulations of blanketing sporadic E-layers, Es-b, using a modified version of a theoretical model for the E region (MIRE) for a Brazilian region: Cachoeira Paulista, a low latitude station. MIRE computes the densities of the metallic ions (Fe+ and Me+) and of the main molecular ions (NO+, O-2(+), N-2(+)) by solving the continuity and momentum equations for each one of them. Additionally, this model includes the physics of Es layer development driven by tidal winds. In this study, we extend MIRE adding a novel neutral wind model derived from the all-sky meteor radar measurements, which provides more trustworthy results related to the Es layer formation in the Brazilian sector. Afterwards, this new model is validated comparing the computed electron density for the Es layer with the electron density obtained using the blanketing frequency parameter (fbEs) deduced from ionograms in the analyzed region. The results show that the values computed by the extended MIRE are in good agreement with the observational data for the Es layers formed by the wind shear mechanism. Therefore, the extended MIRE presented in this work is the only available model that allows simulating Esb layers with a much higher confidence level for the low-latitude in the Brazilian sector. (AU)

• Processo FAPESP: 12/08445-9 - Estudo da variabilidade dia-a-dia da mesosfera, termosfera e ionosfera em baixas latitudes e região equatorial, durante o ciclo solar 24
• Beneficiário: Paulo Roberto Fagundes
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 14/11198-9 - Análise do Efeito de Campos Elétricos Perturbados nas Camadas Es em Regiões Equatoriais e de Baixas Latitudes
• Beneficiário: Láysa Cristina Araújo Resende Chagas
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 12/08769-9 - Estudo das Ondas de Gravidade na Região da Mesosfera e Baixa Termosfera Utilizando Radar Meteórico, Radar de laser e Imageadores CCD All-Sky
• Beneficiário: Vânia Fátima Andrioli Novaes Silva
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado