Seasonal Features of theNmF2 Variability for Different Longitudes of the Middle Latitudes During Enhanced Geomagnetic Activity
- 作者: Depuev V.H.1, Deminov M.G.1, Deminova G.F.1, Depueva A.H.1
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隶属关系:
- Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences (IZMIRAN)
- 期: 卷 64, 编号 5 (2024)
- 页面: 667-677
- 栏目: Articles
- URL: https://journals.rcsi.science/0016-7940/article/view/283421
- DOI: https://doi.org/10.31857/S0016794024050075
- EDN: https://elibrary.ru/QQMJBW
- ID: 283421
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详细
Based on the data of seventeen midlatitude ionospheric stations for 1958–1988, analysis of seasonal features of the F2 layer maximum concentration (NmF2) at different longitudes with enhanced (48 > ap(τ) > 27) geomagnetic activity, where ap(τ) – the weighted average (with a characteristic time of 14 hours) ap-index of this activity. As the characteristics of NmF2 variability, the standard deviation of NmF2 fluctuations for relatively quiet conditions and the average shift of these fluctuations xave during daytime (11–13 LT) and night (23–01 LT) were used. It was obtained that at all analyzed stations, the dispersion σ2 for enhanced geomagnetic activity is greater than for quiet conditions, and, other things being equal, it is maximum in winter at night. For enhanced geomagnetic activity in all seasons, the difference in xave values between the analyzed stations is quite large. One of the reasons for this difference is associated with the dependence of xave on geomagnetic latitudes. To select these latitudes, approximations of the geomagnetic field with tilted dipole (TD), eccentric dipole (ED) or using corrected geomagnetic (CGM) coordinates were used. It has been obtained that the xave dependence on the ED-latitude is more accurate in comparison to the xave dependence on the TD-latitude or CGM-latitude during all seasons at night and during equinoxes and winter – in the daytime. In the summer, in the daytime hours xave dependence on ED-latitude and CGM- latitude are comparable in accuracy, and they are more accurate in comparison to xave dependence on the TD-latitude. Consequently, ED-latitudes are optimal for taking into account the effects of storms in the F2 layer maximum concentration at middle latitudes during all seasons. This conclusion was apparently made for the first time.
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作者简介
V. Depuev
Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences (IZMIRAN)
编辑信件的主要联系方式.
Email: depuev@izmiran.ru
俄罗斯联邦, Moscow, Troitsk
M. Deminov
Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences (IZMIRAN)
Email: depuev@izmiran.ru
俄罗斯联邦, Moscow, Troitsk
G. Deminova
Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences (IZMIRAN)
Email: depuev@izmiran.ru
俄罗斯联邦, Moscow, Troitsk
A. Depueva
Pushkov Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences (IZMIRAN)
Email: depuev@izmiran.ru
俄罗斯联邦, Moscow, Troitsk
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