- PII
- 10.31857/S0016794022600697-1
- DOI
- 10.31857/S0016794022600697
- Publication type
- Status
- Published
- Authors
- Volume/ Edition
- Volume 63 / Issue number 2
- Pages
- 139-146
- Abstract
- Trends in the F2-layer critical frequency foF2 are calculated based on the vertical sounding data at Juliusruh station over a period of 1996–2022. Four solar activity indices: Ly-α, MgII, F10.7mon, and Rz were used. The conclusion drawn previously is confirmed: seasonal (stronger in winter than in summer) and diurnal (stronger in the daytime than at night) variations exist in the foF2 negative trends. It is shown that the results for the first three indices agree very well, whereas the results using Rz provide slightly different results. It has been found that during the recent 5–7 years, the maximum (winter, daytime) negative trends in foF2 became stronger than for the entire considered interval by a factor of 2–3
- Keywords
- Date of publication
- 01.03.2023
- Year of publication
- 2023
- Number of purchasers
- 0
- Views
- 42
References
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