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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The influence of tidal winds in the formation of blanketing sporadic e-layer over equatorial Brazilian region

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Araujo Resende, Laysa Cristina [1] ; Batista, Inez Staciarini [1] ; Denardini, Clezio Marcos [1] ; Batista, Paulo Prado [1] ; Carrasco, Alexander Jose [2] ; Andrioli, Vania Fatima [3] ; Moro, Juliano [3, 4]
Total Authors: 7
[1] Natl Inst Space Res INPE, Sao Jose Dos Campos, SP - Brazil
[2] Los Andes Univ, Merida - Venezuela
[3] Chinese Acad Sci, Natl Space Sci Ctr, Beijing - Peoples R China
[4] Southern Reg Space Res Ctr CRS INPE, Santa Maria, RS - Brazil
Total Affiliations: 4
Document type: Journal article
Web of Science Citations: 4

This work analysis the blanketing sporadic layers (Es-b) behavior over Sao Luis, Brazil (2 degrees 31' S, 44 degrees 16' W, dip: -4.80) which is classified as a transition region between equatorial and low-latitude. Hence, some peculiarities can appear as Es-b occurrence instead of the common E-sq, which is a non-blanketing irregularity layer. The analysis presented here was obtained using a modified version of a theoretical model for the E region (MIRE), which computes the densities of the metallic ions (Fey and me) and the densities of the main molecular ions (NO+, O-2(+) N-2(+)) by solving the continuity and momentum equations for each one of them. In that model, the Es layer physics driven by both diurnal and semidiumal tidal winds are taken into account and it was extended in height coverage by adding a novel neutral wind model derived from the all-sky meteor radar measurements. Thus, we provide more trustworthy results related to the Es layer formation in the equatorial region. We verified the contribution of each tidal wind component to the Es-b layer formation in this equatorial region. Additionally, we compared the Es layer electron density computed by MIRE with the data obtained by using the blanketing frequency parameter (fbEs) deduced from ionograms. The results show that the diurnal component of the tidal wind is more important in the Es-b layer formation whereas the semidiurnal component has a little contribution in our simulations. Finally, it was verified that the modified MIRE presented here can be used to study the Es-b layers occurrence over the equatorial region in the Brazilian sector. (AU)

FAPESP's process: 12/08445-9 - Study of day-to-day variability of the mesosphere, thermosphere and ionosphere at low latitude and equatorial region, during the solar cycle 24
Grantee:Paulo Roberto Fagundes
Support type: Research Projects - Thematic Grants
FAPESP's process: 14/11198-9 - Analysis of the Disturbed Electrical Fields Effects in the Sporadic Layers on Equatorials and Low Latitude Regions
Grantee:Láysa Cristina Araújo Resende Chagas
Support type: Scholarships in Brazil - Post-Doctorate