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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.)

Equatorial E Region Electric Fields and Sporadic E Layer Responses to the Recovery Phase of the November 2004 Geomagnetic Storm

Full text
Author(s):
Moro, J. [1, 2] ; Resende, L. C. A. [3] ; Denardini, C. M. [3] ; Xu, J. [1] ; Batista, I. S. [3] ; Andrioli, V. F. [3, 1] ; Carrasco, A. J. [4] ; Batista, P. P. [3] ; Schuch, N. J. [2]
Total Authors: 9
Affiliation:
[1] Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing - Peoples R China
[2] CRS COCRE INPE, Southern Reg Space Res Ctr, Santa Maria, RS - Brazil
[3] INPE, Natl Inst Space Res, Sao Jose Dos Campos - Brazil
[4] Los Andes Univ, Phys Dept, Merida - Venezuela
Total Affiliations: 4
Document type: Journal article
Source: JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS; v. 122, n. 12, p. 12517-12533, DEC 2017.
Web of Science Citations: 1
Abstract

Equatorial E region electric fields (EEFs) inferred from coherent radar data, sporadic- E (Es) layers observed from a digital ionosonde data, and modeling results are used to study the responses of the equatorial E region over Sao Luis (SLZ, 2.3 degrees S, 44.2 degrees W, similar to-7 degrees dip angle), Brazil, during the super storm of November 2004. The EEF is presented in terms of the zonal (E-y) and vertical (E-z) components in order to analyze the corresponding characteristics of different types of Es seen in ionograms and simulated with the E region ionospheric model. We bring out the variabilities of E-y and E-z components with storm time changes in the equatorial E region. In addition, some aspects of the electric fields and E-s behavior in three cases of weak, very weak, and strong Type II occurrences during the recovery phase of the geomagnetic storm are discussed. The connection between the enhanced occurrence and suppressions of the Type II irregularities and the q-type E-s (Es-q) controlled by electric fields, with the development or disruption of the blanketing sporadic E (Es-b) layers produced by wind shear mechanism, is also presented. The mutual presence of Esq along with the Esb occurrences is a clear indicator of the secular drift of the magnetic equator and hence that of the equatorial electrojet (EEJ) over SLZ. The results show evidence about the EEJ and E-s layer electrodynamics and coupling during geomagnetic disturbance time electric fields. (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 Opportunities: 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 Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 00/09510-1 - Study of the low-latitude upper atmosphere in Brazil
Grantee:Barclay Robert Clemesha
Support Opportunities: Research Projects - Thematic Grants