RETROSPECTIVE ANALYSIS OF LONG-TERM REGIONAL FEATURES OF THE DYNAMIC REGIME OF THE IONOSPHERE OVER THE SOUTH OF EASTERN SIBERIA
Journal Title: Solar-Terrestrial Physics - Year 2023, Vol 9, Issue 3
Abstract
We have carried out a statistical analysis of a huge array of archival experimental data on the dynamic regime of the ionosphere over Irkutsk, obtained by a radiophysical spaced-receiver method with a small base of a radio signal reflected from the ionosphere during vertical ground-based radio sounding near Irkutsk in 1958–1982. Statistical long-term characteristics of drifts of ionization irregularities over the region of the south of Eastern Siberia were obtained. We confirmed clear differences in the nature of the dynamic regime of the lower and upper ionosphere. The motion of ionization in the zonal direction is shown to be more regular than the meridional drift. We determined the characteristic seasonal features of variations in magnitudes and directions of horizontal drift motions at heights of E and F ionospheric regions. The lower ionosphere is characterized by high variability and seasonal variations in motion velocities. In winter, the zonal component of the horizontal ionization drift velocity is directed to the west; in summer, to the east. At the heights of the upper ionosphere, the dynamic regime is more regular. The prevailing zonal direction of the motion of ionization irregularities to the west is observed for all seasons (heights above 230 km). The meridional component of the horizontal drift velocity mainly has a southerly direction. Thus, the horizontal drift of plasma irregularities at the heights of the upper ionosphere is, on the whole, directed to the southwest with the zonal direction predominating.
Authors and Affiliations
Khabituev D. S. , Chernigovskaya M. A.
Keywords
Related Articles
- EP ID EP722182
- DOI 10.12737/stp-93202309
- Views 56
- Downloads 0
EFFECT OF LARGE-SCALE INHOMOGENEITY OF SOLAR WIND VELOCITY ON DISTRIBUTION OF DIRECTIONS OF INTERPLANETARY MAGNETIC FIELD VECTOR
Using data with hourly resolution obtained in near-Earth heliosphere in 1965–2014, we have calculated statistical characteristics of the angles describing the direction of the interplanetary magnetic field (IMF): root-me...
PECULIARITIES OF 630.0 AND 557.7 NM EMISSIONS IN THE MAIN IONOSPHERIC TROUGH: MARCH 17, 2015
Peculiarities of 557.7 and 630.0 nm emissions observed in the second step of the magnetic storm main phase at the mid-latitude observatory Tory (52° N, 103° E) on March 17, 2015 are compared with the changes in ionospher...
MEASUREMENT OF SIBERIAN RADIOHELIOGRAPH CABLE DELAYS
To achieve the maximum dynamic range of solar radio images obtained using aperture synthesis in relatively wide frequency bands 0.1−0.5 % of the operating frequency, it is necessary to compensate the signal propagation d...
RELATION BETWEEN THE AREA OF POLAR CORONAL HOLES AND THE SOLAR WIND SPEED AT A MINIMUM BETWEEN SOLAR CYCLES 22 AND 23
We have used data from the space telescope SOHO/EIT and the spectrometer VEIS on the Wind spacecraft to compare the solar wind (SW) speed near Earth's orbit with changes in the area of polar coronal holes (CHs) on the Su...
Spectral properties of solar wind plasma flux and magnetic field fluctuations across fast reverse interplanetary shocks
We have analyzed spectra of fluctuations in the solar wind plasma flux and the magnetic field magnitude near the front of a fast reverse shocks, using data from the BMSW device (Bright Monitor of Solar Wind) operating on...