Dependence of long-term trends in foF2 at middle latitudes on different solar activity proxies

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F24%3A00580262" target="_blank" >RIV/68378289:_____/24:00580262 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0273117723007834" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0273117723007834</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.asr.2023.09.047" target="_blank" >10.1016/j.asr.2023.09.047</a>

Result language
angličtina
Original language name
Dependence of long-term trends in foF2 at middle latitudes on different solar activity proxies
Original language description
The most studied ionospheric parameter for long-term trends is foF2. The dominant factor of foF2 variability is the solar cycle, which is much stronger than the long-term trends. Therefore its effect in data must be removed. However, several decade long homogeneous measurements of the solar EUV fluxes are not available, so various solar activity proxies (solar activity indices) must be used. The aim of this paper is to study the impact of selection of different solar activity proxies on foF2 long-term trends and to find the best solar activity proxy for foF2 trends at middle latitudes. The results based on yearly average data of six midlatitude stations from four continents (1976–2014) and of six solar activity proxies show that the long-term trends in foF2 depend substantially on the solar activity proxy used, and the only solar proxy, which provides trends of the same sign for all stations and both sub-periods, is F30. Based on results of this paper and that of Laštovička and Burešová (2023), I can recommend F30 as the best solar proxy for studying long-term trends of foF2 at middle latitudes (at least for yearly average values).
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10509 - Meteorology and atmospheric sciences

Project
<a href="/en/project/GA21-03295S" target="_blank" >GA21-03295S: Long-term trends of anthropogenic and natural origin in the stratosphere and upper atmosphere</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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