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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.)

E region electric field dependence of the solar activity

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Author(s):
Denardini, C. M. [1] ; Moro, J. [1] ; Resende, L. C. A. [1] ; Chen, S. S. [1, 2] ; Schuch, N. J. [3] ; Costa, J. E. R. [1]
Total Authors: 6
Affiliation:
[1] Natl Inst Space Res, Sao Jose Dos Campos - Brazil
[2] Univ Taubate, Dept Elect Engn, Taubate - Brazil
[3] INPE, Southern Reg Space Res Ctr, Santa Maria, RS - Brazil
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS; v. 120, n. 10, p. 8934-8941, OCT 2015.
Web of Science Citations: 6
Abstract

We have being studying the zonal and vertical E region electric field components inferred from the Doppler shifts of type 2 echoes (gradient drift irregularities) detected with the 50MHz backscatter coherent radar set at SAo Luis, Brazil (SLZ, 2.3 degrees S, 44.2 degrees W) during the solar cycle 24. In this report we present the dependence of the vertical and zonal components of this electric field with the solar activity, based on the solar flux F-10.7. For this study we consider the geomagnetically quiet days only (Kp3(+)). A magnetic field-aligned-integrated conductivity model was developed for proving the conductivities, using the IRI-2007, the MISIS-2000, and the IGRF-11 models as input parameters for ionosphere, neutral atmosphere, and Earth magnetic field, respectively. The ion-neutron collision frequencies of all the species are combined through the momentum transfer collision frequency equation. The mean zonal component of the electric field, which normally ranged from 0.19 to 0.35mV/m between the 8 and 18h (LT) in the Brazilian sector, show a small dependency with the solar activity. Whereas the mean vertical component of the electric field, which normally ranges from 4.65 to 10.12mV/m, highlights the more pronounced dependency of the solar flux. (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