Geomagnetic control of equatorial plasma bubble activity modeled by the TIEGCM with <i>Kp</i>

Carter, Brett; Retterer, J. M.; Yizengaw, E.; Groves, K. M.; Caton, R. G.; McNamara, Leo F.; Bridgwood, C.; Francis, Matthew J.; Terkildsen, M.; Norman, Robert; Zhang, K.

doi:10.1002/2014gl060953

Cited by 64 publications

(88 citation statements)

References 43 publications

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“…It is well known that the PRE strength is an important parameter in controlling the growth of EPBs (e.g., Abdu et al 1981;Tulasi Ram et al 2006;Su et al 2008;Carter et al 2014a) and that the PRE itself can exhibit a strong daily variability (e.g., Scherliess and Fejer 1999). Figure 6 showed that the plasma above the BCL ionosonde rose significantly faster on the evening of 28 July compared to the rest of the month.…”

Section: Discussionmentioning

confidence: 95%

See 1 more Smart Citation

Unseasonal development of post-sunset F-region irregularities over Southeast Asia on 28 July 2014: 1. Forcing from above?

Carter

Ram

Yizengaw

et al. 2018

Prog Earth Planet Sci

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This contribution is the first of a two-part investigation into an unseasonal post-sunset equatorial F-region irregularity (EFI) event over the Southeast Asian region on the evening of 28 July 2014. Ground-based GPS scintillation data, space-based GPS radio occultation (RO) data, and ionosonde data show the existence of EFIs shortly after sunset over a region spanning 30°in longitude and 40°in latitude, centered on the geomagnetic equator. This post-sunset EFI event was observed during a time of the year when post-sunset equatorial plasma bubbles (EPBs) are very infrequent in the Southeast Asian longitude sector. GPS RO data shows that the EFI event over Southeast Asia coincided with the suppression of peak-season EPBs in the African and Pacific longitude sectors. Ionosonde data shows the presence of a strong pre-reversal enhancement (PRE) in the upward plasma drift over Southeast Asia prior to the detection of EFIs. Further, it is reported that this PRE was significantly stronger than on any other day of July 2014. An analysis of the geophysical conditions during this event reveals that this enhanced PRE was not caused by disturbed geomagnetic activity. Therefore, it is hypothesized that forcing from lower altitudes, perhaps tidal/planetary waves, was the potential cause of this strong PRE, and the subsequent EPB/EFI activity, on this day over the Southeast Asian sector.

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Section: Discussionmentioning

confidence: 95%

“…A series of recent works have examined the daily EPB occurrence during peak EPB season with the use of the Thermosphere Ionosphere Electrodynamics General Circulation Model (Carter et al 2014a;. In these works, the daily variability during peak season was captured by the identification of evenings with decreased EPB growth conditions.…”

Section: Introductionmentioning

confidence: 99%

Unseasonal development of post-sunset F-region irregularities over Southeast Asia on 28 July 2014: 1. Forcing from above?

Carter

Ram

Yizengaw

et al. 2018

Prog Earth Planet Sci

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“…Recently, some efforts have been made in the attempt to predict EPB structures and/or scintillation (e.g., Retterer et al, 2005;Retterer, 2005;Kelley and Retterer, 2008;Rezende et al, 2010;Redmon et al, 2010;Carter et al, 2014a, b;Sousasantos et al, 2017). These works essentially deal only with the existence (or nonexistence) of EPB structures and/or scintillation; however, according to the results presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

Climatology of the scintillation onset over southern Brazil

et al. 2018

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Abstract. This work presents an analysis of the climatology of the onset time of ionospheric scintillations at low latitude over the southern Brazilian territory near the peak of the equatorial ionization anomaly (EIA). Data from L1 frequency GPS receiver located in Cachoeira Paulista (22.4 • S, 45.0 • W; dip latitude 16.9 • S), from September 1998 to November 2014, covering a period between solar cycles 23 and 24, were used in the present analysis of the scintillation onset time. The results show that the start time of the ionospheric scintillation follows a pattern, starting about 40 min earlier, in the months of November and December, when compared to January and February. The analyses presented here show that such temporal behavior seems to be associated with the ionospheric prereversal vertical drift (PRVD) magnitude and time. The influence of solar activity in the percentage of GPS links affected is also addressed together with the respective ionospheric prereversal vertical drift behavior. Based on this climatological study a set of empirical equations is proposed to be used for a GNSS alert about the scintillation prediction. The identification of this kind of pattern may support GNSS applications for aviation and oil extraction maritime stations positioning.

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“…The F region boundary is set at 200 km. The recombination rate is assumed to be zero as in Carter et al [2014a]. Because the upper limit of the TIEGCM is at about 500 km, the field line can reach roughly15°magnetic latitudes in both north and south.…”

Section: Model Calculation Of Growth Ratementioning

confidence: 99%

“…For example, Luo et al [2012] used International Reference Ionosphere and horizontal wind model to calculate the growth rate. Recently, Carter et al [2014aCarter et al [ , 2014b used the Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM) to calculate the R-T growth rate and successfully showed that the R-T rate is affected by geomagnetic activity. Because the TIEGCM is a comprehensive ionosphere model with many options, more can be done with the model to calculate the R-T growth rate.…”

Section: Introductionmentioning

confidence: 99%

Longitudinal and seasonal variation of the equatorial flux tube integrated Rayleigh‐Taylor instability growth rate

2015

JGR Space Physics

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Using the National Center for Atmospheric Research Thermosphere Ionosphere Electrodynamics General Circulation Model (TIEGCM), the ionospheric Rayleigh‐Taylor instability growth rate is calculated. The seasonal and longitudinal variations of the growth rate from the TIEGCM appear to match that of the spread F observed by various satellite missions. The growth rate is strongly dependent on the angle between the sunset terminator and the geomagnetic field line near the magnetic equator. The TIEGCM simulations with nonmigrating tides show the zonal wave number 4 structure in the Rayleigh‐Taylor instability due to the inclusion of the nonmigrating diurnal eastward zonal wave number 3 and semidiurnal eastward zonal wave number 2 tides.

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Geomagnetic control of equatorial plasma bubble activity modeled by the TIEGCM with Kp

Cited by 64 publications

References 43 publications

Unseasonal development of post-sunset F-region irregularities over Southeast Asia on 28 July 2014: 1. Forcing from above?

Unseasonal development of post-sunset F-region irregularities over Southeast Asia on 28 July 2014: 1. Forcing from above?

Climatology of the scintillation onset over southern Brazil

Longitudinal and seasonal variation of the equatorial flux tube integrated Rayleigh‐Taylor instability growth rate

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