Planetary Wave Periods in <Emphasis Type="Italic">foF</Emphasis>2 Time Variations Based on Winter Data from Kaliningrad Station in 2008−2010     

Yu. N. Koren’kov  F. S. Bessarab  N. A. Koren’kova  V. S. Leshchenko 《Geomagnetism and Aeronomy》2018,58(3):420-429

The study presents the results of the analysis of the F2-layer critical frequency variations obtained for the winter periods of 2008–2010, during which sudden stratospheric warmings were observed. The data were obtained at Kaliningrad ionospheric station (54.6° N, 20° E) with the Parus digital ionosonde in standard sounding mode. The mean daily foF2 values were used in the analysis. The results of spectral analysis based on continuous wavelet transform showed that, during all of the warmings that occurred in 2008–2010, the foF2 time variations demonstrated the presence of wave processes with periods of approximately 5?6 days, as well as more extended processes with periods of ~10?13 and 23?30 days. These periods coincide with the characteristic periods of planetary waves observed in the mesosphere during sudden stratospheric warmings, while the 13- and 30-day periods can be conditioned by the influence of the Sun.  相似文献   

Correlation Analysis of Global Ionospheric Total Electron Content Maps in March 2015     

Timchenko  A. V.  Bessarab  F. S.  Klimenko  M. V.  Radievsky  A. V.  Klimenko  V. V. 《Geomagnetism and Aeronomy》2022,62(3):217-226

Geomagnetism and Aeronomy - The work presents an analysis of changes in the correlation coefficient between the total electron content variations at magnetically conjugate points calculated based...  相似文献   

Tidal and Planetary Waves in the Lower Thermosphere and Ionosphere Simulated with the EAGLE Model for the January 2009 Sudden Stratospheric Warming Conditions     

Vasiliev  P. A.  Bessarab  F. S.  Karpov  I. V.  Klimenko  V. V.  Klimenko  M. V.  Sukhodolov  T. V.  Rozanov  E. V. 《Izvestiya Atmospheric and Oceanic Physics》2019,55(2):178-187

Izvestiya, Atmospheric and Oceanic Physics - The results of analyzing the planetary and tidal variabilities in the mesosphere, thermosphere, and ionosphere acquired in calculations for January 2009...  相似文献   

Influence of geomagnetic storms of September 26–30, 2011, on the ionosphere and HF radiowave propagation. I. Ionospheric effects     

M. V. Klimenko  V. V. Klimenko  F. S. Bessarab  K. G. Ratovsky  I. E. Zakharenkova  I. A. Nosikov  A. E. Stepanov  D. S. Kotova  V. G. Vorobjev  O. I. Yagodkina 《Geomagnetism and Aeronomy》2015,55(6):744-762

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Modeling the Effect of Mesospheric Internal Gravity Waves in the Thermosphere and Ionosphere During the 2009 Sudden Stratospheric Warming     

I. V. Karpov  F. S. Bessarab  O. P. Borchevkina  K. A. Artemenko  A. I. Klopova 《Geomagnetism and Aeronomy》2018,58(4):509-522

The results of numerical experiments on the modeling of thermospheric and ionospheric disturbances under conditions of sudden stratospheric warming are presented to study the possible mechanisms of such disturbances. Local disturbances caused by a planetary wave with zonal wave number s = 1 and internal gravity waves (IGWs) propagating from the disturbed region in the stratosphere are taken into account as sources of disturbances. It is shown that the inclusion of an additional source of thermospheric disturbances caused by mesospheric variations of atmospheric parameters with IGW periods over the region of sudden stratospheric warming leads to significant changes in the parameters of the thermosphere and ionosphere, including a change in the global structure of the distributions of the gas components of the thermosphere and a shift in maximum concentrations of atomic oxygen to low latitudes of the Southern Hemisphere; there is an increase in the mean values, the diurnal and semidiurnal variations of the ion concentration in the F region of the ionosphere. These features of changes in the parameters of the thermosphere and ionosphere occurred with insignificant disturbances of tidal variations in the thermosphere.  相似文献   

Features of Variations in the F2-Layer Critical Frequency During the Sudden Stratospheric Warnings of 1966–2009 According to Data from Kaliningrad and Irkutsk Stations     

Timchenko  A. V.  Bessarab  F. S.  Koren’kov  Yu. N.  Koren’kova  N. A.  Borchevkina  O. P.  Ratovsky  K. G. 《Geomagnetism and Aeronomy》2021,61(1):100-107

Geomagnetism and Aeronomy - A study of the wave changeability in the F2-layer critical frequency over Kaliningrad (54.6° N, 20° E) and Irkutsk (53° N, 103° E) stations during...  相似文献   

Global model of the thermosphere-ionosphere-protonosphere system     

A. A. Namgaladze  Yu. N. Korenkov  V. V. Klimenko  I. V. Karpov  F. S. Bessarab  V. A. Surotkin  T. A. Glushchenko  N. M. Naumova 《Pure and Applied Geophysics》1988,127(2-3):219-254

In this paper the formulation of the problem and preliminary numerical computation results of the thermosphere-ionosphere-protonosphere system parameters are discussed.The model constructed describes time-dependent distributions of the multicomponent near-earth space plasma parameters by means of numerical integration of the appropriate three-dimensional plasma hydrodynamic equations. In the thermospheric block of the model, global distribution of neutral gas temperature and N₂, O₂, O concentrations, as well as three-dimensional circulation of the neutral gas are calculated in the range of height from 80 km to 520 km. In the ionospheric section of the model, global time-dependent distribution of ion and electron temperatures, as well as molecular and atomic O⁺, H⁺ ion concentrations are calculated. Global two-dimensional distribution of electric potential is calculated taking into account computed thermosphere and ionosphere parameters.The inputs needed for our global model are the solar EUV spectrum; the auroral precipitation pattern; the distribution of the field-aligned currents and the model of the geomagnetic field.Preliminary results are obtained without regard to electromagnetic plasma drift for the solar minimum, low geomagnetic activity and spring equinox conditions. Global distributions of the calculated parameters in the magnetic dipole latitude-longitude frame are presented for 1200 UT. In the summary ignored processes and future direction are discussed.  相似文献   

Model studying the effect of the solar terminator on the thermospheric parameters     

I. V. Karpov  F. S. Bessarab 《Geomagnetism and Aeronomy》2008,48(2):209-219

The results of model studying the mechanism of formation of large-scale disturbances in the thermosphere under the action of short-period waves propagating from the middle atmosphere are presented. The region of the solar terminator is considered as a source of such waves. The calculation results for the summer conditions in the Northern Hemisphere indicate that such an energy source, local in the space and time, results in the formation of large-scale inhomogeneities at altitudes of 120–160 km. A disturbance of these inhomogeneities is caused by the nonlinear and dissipative processes accompanying HF propagation in the terminator region. Large-scale disturbances have a quasistationary character and are localized near the morning and evening terminators. Vortex motions around the pole at altitudes of 140–160 km are formed at nigh latitudes of the winter hemisphere under the polar night conditions.  相似文献   

Quasi-wave variations in <Emphasis Type="Italic">foEs</Emphasis> during stratospheric warmings of 2008–2010 according to data from Kaliningrad ionospheric station     

Yu. N. Koren’kov  N. A. Koren’kova  F. S. Bessarab  V. S. Lechshenko 《Geomagnetism and Aeronomy》2017,57(4):451-460

The results of analysis of variations in the sporadic layer critical frequency (foEs) for winter periods of 2008–2010 in which sudden stratospheric warmings were observed are presented in the paper. The data were obtained at Kaliningrad ionospheric station (54.6° N, 20° E) by a Parus digital ionosonde under the usual sounding regime with an interval of 15 min. Daily mean values of foEs were used for the analysis. Solar and geomagnetic activity remained low during the periods under study, making it possible to relate the quasiwave time variations in foEs to the parameters of stratospheric warmings. The results of spectral analysis performed on the basis of continuous wavelet transform showed that, during all warmings occurring in 2008–2010, time variations in foEs show the presence of wave processes with a period of an order of 5 days and longer ones with a period of ~10—11 days. These periods coincide with characteristic periods of planetary waves observed in the atmosphere during sudden stratospheric warnings.  相似文献