Ionospheric Investigations Conducted by Chinese Mainland Scientists in 2020–2021
doi: 10.11728/cjss2022.04.yg13 cstr: 32142.14.cjss2022.04.yg13
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Abstract: In this report, we outline works done by scientists from the Mainland of China on various ionospheric topics after the release of the National Report of China in 2020 on ionospheric research[
1 ] to the Committee on Space Research (COSPAR). More than 170 papers were published in 2020–2021. The current report covers the following topics: ionospheric space weather, ionospheric structures and climatology, ionospheric dynamics and couplings, ionospheric irregularity and scintillation, modeling and data assimilation, and ionosphere and sounding techniques. Planetary ionospheres are included for the first time.-
Key words:
- Ionospheric /
- Space weather /
- Planetary ionospheres
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Figure 2. Comparison of 50 min averages from the coupled geospase model simulations of magnetospheric and ionospheric states with and without the solar flare effects. Projections in GSM coordinates of the simulated magnetospheric convection velocity in the equatorial plane with (a) and without (b) the solar flare effects and their difference (c). High-latitude electric potential in the ionosphere with (d) and without (e) solar flare effects and their difference (f)
Figure 9. Occurrence of large-scale strong Es structures during 2017–2019 binned into (a) local time and month, (b) the elongation azimuth and dimension, and (c) the horizontal drifting direction and average velocity. (d) The onset locations of all the cases of large-scale Es structures observed during 2017–2019 on a map of topography elevation height. Each black solid line illustrates the location, dimension and elongating direction at the onset of each large-scale Es case
Figure 14. Density variations of the same species as a function of local time and at fixed altitudes, either 300 km (solid) or 180 km (dashed) depending on whether a distinctive layer structure is observable over the altitude range examined in this study. A strong dawn enhancement is observed for each species in the middle panel. Note that the HNO+ density has been everywhere divided by 100 to improve visibility
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