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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.)

Occurrence of the blanketing sporadic E layer during the recovery phase of the October 2003 superstorm

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Author(s):
Denardini, Clezio Marcos [1, 2] ; Araujo Resende, Laysa Cristina [1] ; Moro, Juliano [3] ; Chen, Sony Su [1]
Total Authors: 4
Affiliation:
[1] Natl Inst Space Res, Sao Jose Dos Campos, SP - Brazil
[2] Embrace INPE, Ave Astronautas 1758, BR-12227010 Sao Jose Dos Campos, SP - Brazil
[3] Southern Reg Space Res Ctr INPE, Santa Maria, RS - Brazil
Total Affiliations: 3
Document type: Journal article
Source: EARTH PLANETS AND SPACE; v. 68, MAY 14 2016.
Web of Science Citations: 2
Abstract

We have routinely monitored the total frequency (ftEs) and the blanketing frequency (fbEs) of sporadic E layers with the digital sounder under the magnetic equator in the Brazilian sector. Sporadic layers appear in the equatorial region (Es-q) at heights between 90 and 130 km, mainly due to irregularities in the equatorial electrojet current. However, during the recovery phase of the October 2003 superstorm, an anomalous intensification of the ionospheric density that exceeded the normal ambient background values for local time and location was observed. The parameter fbEs rose to almost 7.5 MHz during this event, due to a type ``c{''} blanketing sporadic layer (Es-c), which is driven by wind shear. This result is discussed in terms of the atmosphere dynamics based on magnetic signature of the equatorial electrojet current using magnetometer data. Also, using data measured by sensors onboard the Geostationary Operational Environmental Satellite (GOES) 10 we analyze the possible influence of the solar flare-associated X-ray flux as an additional source of ionization. (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