Ionospheric TEC disturbances over China during the strong geomagnetic storm in September 2017

Wen, Duancheng; Mei, Dengkui

doi:10.1016/j.asr.2020.03.002

Cited by 25 publications

(8 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Until UTC10:00, IED shows higher than that in September 7, 2017, when the positive storm occurred. The midlatitude region at 110°E denotes the areas of China, our results agree with the previous study on ionospheric TEC disturbances over China during the strong geomagnetic storm in September 2017, when the enhancements of TEC occurred (Wen & Mei, 2020). From UTC16:00 to 20:00, obvious decrease of the IED was observed, especially in midlatitude and high latitude.…”

Section: Resultssupporting

confidence: 92%

Global Monitoring of Geomagnetic Storm‐Induced Ionosphere Anomalies Using 3‐D Ionospheric Modeling With Multi‐GNSS and COSMIC Measurements

et al. 2021

View full text Add to dashboard Cite

Ionosphere is a signiﬁcant component of the solar‐terrestrial space environment. Geomagnetic storm induces global ionospheric disturbances, severely affect radio communications and human space activities, e.g., earth observation, deep space exploration, and space weather monitoring and prediction. Monitoring ionospheric anomalies are critical to improve the performance of Global Navigation Satellite System (GNSS) positioning, navigation and timing (PNT) and provide early‐warning of disaster service during the extreme space weather event. The spatial and temporal variation of ionospheric electron density (IED) is utilized to characterize the ionospheric anomalies respond to storm. Thus, the global‐scale three‐dimensional (3‐D) ionospheric model is constructed by computerized ionospheric omography (CIT) technique combine multi‐GNSS(GPS/GLONASS/BDS/Galileo) and Constellation Observing System for Meteorology, Ionosphere, and Climate (COSMIC) radio occultation (RO) measurements. As ground‐based multi‐GNSS and space‐based Low Earth Orbit (LEO)/GNSS observation networks expand gradually, massive measurements are employed in ionospheric inversion in high temporal‐spatial resolution. Hence, the Open Multi‐Processing (OpenMP) parallel computing method is applied to improve the efﬁciency of imaging 3‐D ionosphere. The processing time reduces to within 10 mins, thus 3‐D ionospheric model updates in near real‐time is achievable. Moreover, the 3‐D IED model is applied to monitor the ionosphere dynamically during storms and the storm‐induced ionospheric anomalies are observed. This contribution suggests our reconstructed 3‐D model is capable of reﬂecting the ionospheric anomalies during storm in global‐scale, also it reveals the characteristics of the ionosphere respond to the storm and its evolution.

show abstract

Section: Resultssupporting

confidence: 92%

Global Monitoring of Geomagnetic Storm‐Induced Ionosphere Anomalies Using 3‐D Ionospheric Modeling With Multi‐GNSS and COSMIC Measurements

et al. 2021

View full text Add to dashboard Cite

show abstract

“…As shown in Figure 3, the ionospheric TEC behaviors response to geomagnetic storms were different in three longitudinal sectors. From Figures 3a–3f, using our disturbance criteria, TEC perturbations over the American chain on 7 September did not exceed our threshold, which is not consistent with the short‐time ionospheric regularities reported by (Wen & Mei, 2020; Zhang et al., 2019). In the initial main phase of the first storm, most of TEC observations enhanced with 2‐5TECU in a period of 0‐3UT, 8 September.…”

Section: Resultscontrasting

confidence: 65%

Spatial‐Temporal Behaviors of Large‐Scale Ionospheric Perturbations During Severe Geomagnetic Storms on September 7–8 2017 Using the GNSS, SWARM and TIE‐GCM Techniques

Zhao

Hé

et al. 2022

JGR Space Physics

View full text Add to dashboard Cite

Geomagnetic storms on 7–8 September 2017 triggered severe ionospheric disturbances that had a serious effect on satellite navigation and radio communication. Multiple observations derived from Global Navigation Satellite System receivers, Earth's Magnetic Field and Environment Explorers (SWARM) and the Thermosphere‐Ionosphere ‐Electrodynamics General Circulation Model's simulations are utilized to investigate the spatial‐temporal ionospheric behaviors under storm conditions. The results indicate that the electron density in the Asia‐Australia, Europe‐Africa and America sectors suddenly changed with the Bz southward excursion, and the ionosphere over low‐middle latitudes under the sunlit hemisphere is easily affected by the disturbed magnetic field. The SWARM observations verified the remarkable double‐peak structure of plasma enhancements over the equator and middle latitudes. The physical mechanism of low‐middle plasma disturbances can be explained by a combination effect of equatorial electrojets, vertical E × B drifts, meridional wind and thermospheric O/N2 change. Besides, the severe storms triggered strong Polar plasma disturbances on both dayside and nightside hemispheres, and the Polar disturbances had a latitudinal excursion associated with the offset of geomagnetic field. Remarkable plasma enhancements at the altitudes of 100–160 km were also observed in the auroral zone and middle latitudes (>47.5°N/S). The topside polar ionospheric plasma enhancements were dominated by the O+ ions. Furthermore, the TIE‐GCM's simulations indicate that the enhanced vertical E × B drifts, cross polar cap potential and Joule heating play an important role in generating the topside plasma perturbations.

show abstract

“…The resulting ionospheric disturbances and severe space weather impacts during the geomagnetic storms have been widely reported over continental regions in earlier studies (Aa et al, 2018;Li et al, 2018;Wen & Mei, 2020;Zakharenkova & Cherniak, 2021). However, they have rarely been investigated in marine regions owing to the lack of GNSS stations (Ren et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

“…During this storm, the maximum value of the solar wind speed reached 817 km/s at 08:00 UT on 8 September, and the minima of SYM-H and maxima of AE reached −146 nT at 01:00 UT on 8 September and 2,677 nT at 14:00 UT on 8 September, respectively. This storm was also particularly intriguing since it severely perturbed the ionosphere over continental regions, and impulsive ionospheric perturbations and severe space weather impacts have been reported (Aa et al, 2018;Akala et al, 2020;Jimoh et al, 2019;Lei et al, 2018;Li et al, 2018;Wen & Mei, 2020;Wan et al, 2021;Zakharenkova & Cherniak, 2021). However, the distribution of ionospheric irregularities remains unknown, and has not yet been reported over ocean regions, owing to the lack of ground GNSS receivers.…”

Section: Case Study: the Severe G4-class Geomagnetic Storm Of 8 Septe...mentioning

confidence: 99%

Leveraging the CYGNSS Spaceborne GNSS‐R Observations to Detect Ionospheric Irregularities Over the Oceans: Method and Verification

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

Ionospheric TEC disturbances over China during the strong geomagnetic storm in September 2017

Cited by 25 publications

References 21 publications

Global Monitoring of Geomagnetic Storm‐Induced Ionosphere Anomalies Using 3‐D Ionospheric Modeling With Multi‐GNSS and COSMIC Measurements

Global Monitoring of Geomagnetic Storm‐Induced Ionosphere Anomalies Using 3‐D Ionospheric Modeling With Multi‐GNSS and COSMIC Measurements

Spatial‐Temporal Behaviors of Large‐Scale Ionospheric Perturbations During Severe Geomagnetic Storms on September 7–8 2017 Using the GNSS, SWARM and TIE‐GCM Techniques

Leveraging the CYGNSS Spaceborne GNSS‐R Observations to Detect Ionospheric Irregularities Over the Oceans: Method and Verification

Contact Info

Product

Resources

About