Spatial and Temporal Evolution of Different-Scale Ionospheric Irregularities in Central and East Siberia During the 27-28 May 2017 Geomagnetic Storm

被引：6

作者：

Ovodenko, V. B. ^{[1
]}

Klimenko, M. V. ^{[1
]}

Zakharenkova, I. E. ^{[1
]}

Oinats, A. V. ^{[2
]}

Kotova, D. S. ^{[1
,3
]}

Nikolaev, A. V. ^{[4
]}

Tyutin, I. V. ^{[5
]}

Rogov, D. D. ^{[4
]}

Ratovsky, K. G. ^{[2
]}

Chugunin, D. V. ^{[1
,6
]}

Budnikov, P. A. ^{[7
]}

Coxon, J. C. ^{[8
]}

Anderson, B. J. ^{[9
]}

Chernyshov, A. A. ^{[1
,6
]}

机构：

[1] RAS, West Dept Pushkov Inst Terr Magnetism Ionosphere, Kaliningrad, Russia

[2] RAS, SB, Inst Solar Terr Phys, Irkutsk, Russia

[3] Univ Oslo, Dept Phys, Oslo, Norway

[4] Arctic & Antarctic Res Inst, St Petersburg, Russia

[5] JSC Sci Res Inst Long Distance Radiocommun, Moscow, Russia

[6] Russian Acad Sci, Space Res Inst, Moscow, Russia

[7] Fedorov Inst Appl Geophys, Moscow, Russia

[8] Univ Southampton, Southampton, Hants, England

[9] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA

来源：

SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS | 2020年 / 18卷 / 06期

基金：

俄罗斯科学基金会;

关键词：

field-aligned irregularities; radar auroral backscatter; rate of TEC change; field-aligned currents; E layer; HF absorption; FIELD-ALIGNED CURRENTS; REGION COHERENT ECHOES; RADIO-AURORA; ASPECT ANGLE; ASPECT SENSITIVITY; STATISTICAL-MODEL; RADAR BACKSCATTER; MAGNETIC ACTIVITY; SUPERDARN; FLUCTUATIONS;

D O I：

10.1029/2019SW002378

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a multi-instrumental study of ionospheric irregularities of different scales (from tens of centimeters to few kilometers) observed over the Central and East Siberia, Russia, during a moderate-to-strong geomagnetic storm on 27-28 May 2017. From high-frequency (HF) and ultrahigh-frequency (UHF) radar data, we observed an intense auroral backscatter developed right after the initial phase of the geomagnetic storm. Additionally, we examined variations of Global Positioning System (GPS)-based ROT (rate of TEC changes, where TEC is total electron content) for available GPS receivers in the region. Ionosondes, HF, and UHF radar data exhibited a presence of intense multi-scale ionospheric irregularities. We revealed a correlation between different-scale Auroral/Farley-Buneman ionospheric irregularities of the E layer during the geomagnetic storm. The combined analysis showed that an area of intense irregularities is well connected and located slightly equatorward to field-aligned currents (FACs) and auroral oval at different stages of the geomagnetic storm. An increase and equatorward displacement of Region 1 (R1)/Region 2 (R2) FACs leads to appearance and equatorward expansion of ionospheric irregularities. During downward (upward) R1 FAC and upward (downward) R2 FAC, the eastward and upward (westward and downward) E x B drift of ionospheric irregularities occurred. Simultaneous disappearance of UHF/HF auroral backscatter and GPS ROT decrease occurred during a prolonged near noon reversal of R1 and R2 FAC directions that accompanied by R1/R2 FAC degradation and disappearance of high-energy auroral precipitation.

引用

页数：19

共 7 条

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Zakharenkova, I. E.
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Chugunin, D., V
Chernyshov, A. A.
Ratovsky, K. G.
Chirik, N., V
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Klimenko, V. V.
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