An Investigation of the Ionospheric Disturbances Due to the 2014 Sudden Stratospheric Warming Events Over Brazilian Sector

The present study investigates the ionospheric F region response in the Brazilian sector due to sudden stratospheric warming (SSW) events of 2014. The data used for this work are obtained from GPS receivers and magnetometer measurements during day of year (DOY) 01 to 120, 2014 at different stations...

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Veröffentlicht in:Journal of geophysical research. Space physics 2017-11, Vol.122 (11), p.11,698-11,715
Hauptverfasser: Jesus, R., Batista, I. S., Jonah, O. F., Abreu, A. J., Fagundes, P. R., Venkatesh, K., Denardini, C. M.
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container_end_page 11,715
container_issue 11
container_start_page 11,698
container_title Journal of geophysical research. Space physics
container_volume 122
creator Jesus, R.
Batista, I. S.
Jonah, O. F.
Abreu, A. J.
Fagundes, P. R.
Venkatesh, K.
Denardini, C. M.
description The present study investigates the ionospheric F region response in the Brazilian sector due to sudden stratospheric warming (SSW) events of 2014. The data used for this work are obtained from GPS receivers and magnetometer measurements during day of year (DOY) 01 to 120, 2014 at different stations in the equatorial and low‐latitude regions in the Brazilian sector. In addition, the data obtained from Communication/Navigation Outage Forecasting System satellites during DOY 01 to 75 of 2014 are used. The main novelty of this research is that, during the 2014 SSW events, daytime vertical total electron content (VTEC) shows a strong increase on the order of about 23% and 11% over the equatorial and low‐latitude regions, respectively. We also observed that the nighttime VTEC (SSW days) is increased by 8% and 33% over equatorial and low‐latitude regions, respectively. The magnetometer measurements show a strong counterelectrojet during the SSW days. The results show an amplification of the 0.5 day and ~2–16 day periods in the VTEC and equatorial electrojet during the SSWs. The occurrences of ionospheric irregularities during the SSW events are around 84% and 53% in the equatorial and low‐latitude regions, respectively, which is less frequent when compared with those during the pre‐SSW periods. Key Points Influence of sudden stratospheric warming (SSW) on the ionosphere over Brazilian sector is investigated Observation of significant increase in VTEC and strong CEJ during SSW events of 2014 Minor ionospheric irregularity occurrence is observed during SSW days compared to non‐SSW days
doi_str_mv 10.1002/2017JA024560
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S. ; Jonah, O. F. ; Abreu, A. J. ; Fagundes, P. R. ; Venkatesh, K. ; Denardini, C. M.</creator><creatorcontrib>Jesus, R. ; Batista, I. S. ; Jonah, O. F. ; Abreu, A. J. ; Fagundes, P. R. ; Venkatesh, K. ; Denardini, C. M.</creatorcontrib><description>The present study investigates the ionospheric F region response in the Brazilian sector due to sudden stratospheric warming (SSW) events of 2014. The data used for this work are obtained from GPS receivers and magnetometer measurements during day of year (DOY) 01 to 120, 2014 at different stations in the equatorial and low‐latitude regions in the Brazilian sector. In addition, the data obtained from Communication/Navigation Outage Forecasting System satellites during DOY 01 to 75 of 2014 are used. The main novelty of this research is that, during the 2014 SSW events, daytime vertical total electron content (VTEC) shows a strong increase on the order of about 23% and 11% over the equatorial and low‐latitude regions, respectively. We also observed that the nighttime VTEC (SSW days) is increased by 8% and 33% over equatorial and low‐latitude regions, respectively. The magnetometer measurements show a strong counterelectrojet during the SSW days. The results show an amplification of the 0.5 day and ~2–16 day periods in the VTEC and equatorial electrojet during the SSWs. The occurrences of ionospheric irregularities during the SSW events are around 84% and 53% in the equatorial and low‐latitude regions, respectively, which is less frequent when compared with those during the pre‐SSW periods. Key Points Influence of sudden stratospheric warming (SSW) on the ionosphere over Brazilian sector is investigated Observation of significant increase in VTEC and strong CEJ during SSW events of 2014 Minor ionospheric irregularity occurrence is observed during SSW days compared to non‐SSW days</description><identifier>ISSN: 2169-9380</identifier><identifier>EISSN: 2169-9402</identifier><identifier>DOI: 10.1002/2017JA024560</identifier><language>eng</language><publisher>Washington: Blackwell Publishing Ltd</publisher><subject>Communication satellites ; Communications systems ; Electrojets ; Equatorial electrojet ; equatorial ionospheric irregularities ; Equatorial regions ; F region ; Global positioning systems ; GPS ; Ionosphere ; Ionospheric disturbances ; Ionospheric irregularities ; Irregularities ; Latitude ; Magnetometers ; Ozone ; Stratosphere ; Stratospheric warming ; Studies ; sudden stratospheric warming</subject><ispartof>Journal of geophysical research. 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S.</creatorcontrib><creatorcontrib>Jonah, O. F.</creatorcontrib><creatorcontrib>Abreu, A. J.</creatorcontrib><creatorcontrib>Fagundes, P. R.</creatorcontrib><creatorcontrib>Venkatesh, K.</creatorcontrib><creatorcontrib>Denardini, C. M.</creatorcontrib><title>An Investigation of the Ionospheric Disturbances Due to the 2014 Sudden Stratospheric Warming Events Over Brazilian Sector</title><title>Journal of geophysical research. Space physics</title><description>The present study investigates the ionospheric F region response in the Brazilian sector due to sudden stratospheric warming (SSW) events of 2014. The data used for this work are obtained from GPS receivers and magnetometer measurements during day of year (DOY) 01 to 120, 2014 at different stations in the equatorial and low‐latitude regions in the Brazilian sector. In addition, the data obtained from Communication/Navigation Outage Forecasting System satellites during DOY 01 to 75 of 2014 are used. The main novelty of this research is that, during the 2014 SSW events, daytime vertical total electron content (VTEC) shows a strong increase on the order of about 23% and 11% over the equatorial and low‐latitude regions, respectively. We also observed that the nighttime VTEC (SSW days) is increased by 8% and 33% over equatorial and low‐latitude regions, respectively. The magnetometer measurements show a strong counterelectrojet during the SSW days. The results show an amplification of the 0.5 day and ~2–16 day periods in the VTEC and equatorial electrojet during the SSWs. The occurrences of ionospheric irregularities during the SSW events are around 84% and 53% in the equatorial and low‐latitude regions, respectively, which is less frequent when compared with those during the pre‐SSW periods. 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subjects Communication satellites
Communications systems
Electrojets
Equatorial electrojet
equatorial ionospheric irregularities
Equatorial regions
F region
Global positioning systems
GPS
Ionosphere
Ionospheric disturbances
Ionospheric irregularities
Irregularities
Latitude
Magnetometers
Ozone
Stratosphere
Stratospheric warming
Studies
sudden stratospheric warming
title An Investigation of the Ionospheric Disturbances Due to the 2014 Sudden Stratospheric Warming Events Over Brazilian Sector
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