Longitudinal variations of geomagnetic and ionospheric parameters in the Northern Hemisphere during magnetic storms according to multi-instrument observations

0535509 - ÚFA 2022 RIV GB eng J - Článek v odborném periodiku
Chernigovskaya, M.A. - Shpynev, B.G. - Yasyukevich, A.S. - Khabituev, D.S. - Ratovsky, K.G. - Belinskaya, A.Yu. - Stepanov, A. E. - Bychkov, V.V. - Grigorieva, S.A. - Panchenko, V.A. - Kouba, Daniel - Mielich, J.
Longitudinal variations of geomagnetic and ionospheric parameters in the Northern Hemisphere during magnetic storms according to multi-instrument observations.
Advances in Space Research. Roč. 67, č. 2 (2021), s. 762-776. ISSN 0273-1177. E-ISSN 1879-1948
Institucionální podpora: RVO:68378289
Klíčová slova: Ionosonde chain * Chain of GPS/GLONASS receivers * Ionospheric disturbances * Geomagnetic field variations * Geomagnetic storm
Obor OECD: Meteorology and atmospheric sciences
Impakt faktor: 2.611, rok: 2021
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/pii/S0273117720307560

We present a joint analysis of longitude-temporal variations of ionospheric and geomagnetic parameters at middle and high latitudes in the Northern Hemisphere during the two severe magnetic storms in March and June 2015 by using data from the chains of magnetometers, ionosondes and GPS/GLONASS receivers. We identify the fixed longitudinal zones where the variability of the magnetic field is consistently high or low under quiet and disturbed geomagnetic conditions. The revealed longitudinal structure of the geomagnetic field variability in quiet geomagnetic conditions is caused by the discrepancy of the geographic and magnetic poles and by the spatial anomalies of different scales in the main magnetic field of the Earth. Variations of ionospheric parameters are shown to exhibit a pronounced longitudinal inhomogeneity with changing geomagnetic conditions. This inhomogeneity is associated with the longitudinal features of background and disturbed structure of the geomagnetic field. During the recovery phase of a storm, important role in dynamics of the mid-latitude ionosphere may belong to wave-like thermospheric disturbances of molecular gas, propagating westward for several days. Therefore, it is necessary to extend the time interval for studying the ionospheric effects of strong magnetic storms by a few days after the end of the magnetospheric source influence, while the disturbed regions in the thermosphere continues moving westward and causes the electron density decrease along the trajectories of propagation.
Trvalý link: http://hdl.handle.net/11104/0313512