0489064 - ÚFA 2018 RIV FR eng J - Článek v odborném periodiku
Paul, K.S. - Haralambous, H. - Oikonomou, Ch. - Paul, A. - Belehaki, A. - Tsagouri, I. - Kouba, Daniel - Burešová, Dalia
Multi-station investigation of spread F over Europe during low to high solar activity.
Journal of Space Weather and Space Climate. Roč. 8, A27 (2018), č. článku A27. ISSN 2115-7251. E-ISSN 2115-7251
Grant CEP: GA ČR(CZ) GC15-07281J
Institucionální podpora: RVO:68378289
Klíčová slova: nighttime midlatitude ionosphere over Europe * effects of solar activity over spread F occurrence * longitudinal and latitudinal dependence of spread F occurrence
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 2.821, rok: 2018 ; AIS: 1.218, rok: 2018
Způsob publikování: Open access
Web výsledku:
https://www.swsc-journal.org/articles/swsc/full_html/2018/01/swsc170091/swsc170091.htmlDOI: https://doi.org/10.1051/swsc/2018006

Spread F is an ionospheric phenomenon which has been reported and analyzed extensively over equatorial regions on the basis of the Rayleigh-Taylor (R-T) instability. It has also been investigated over midlatitude regions, mostly over the Southern Hemisphere with its generation attributed to the Perkins instability mechanism. Over midlatitudes it has also been correlated with geomagnetic storms through the excitation of travelling ionospheric disturbances (TIDs) and subsequent F region uplifts. The present study deals with the occurrence rate of nighttime spread F events and their diurnal, seasonal and solar cycle variation observed over three stations in the European longitude sector namely Nicosia (geographic Lat: 35.29 °N, Long: 33.38 °E geographic: geomagnetic Lat: 29.38 °N), Athens (geographic Lat: 37.98 °N, Long: 23.73 °E geographic: geomagnetic Lat: 34.61 °N) and Pruhonice (geographic Lat: 50.05 °N, Long: 14.41 °E geographic: geomagnetic Lat: 47.7 °N) during 2009, 2015 and 2016 encompassing periods of low, medium and high solar activity, respectively. The latitudinal and longitudinal variation of spread F occurrence was examined by considering different instability triggering mechanisms and precursors which past literature
identified as critical to the generation of spread F events. The main findings of this investigation is an inverse solar cycle and annual temporal dependence of the spread F occurrence rate and a different dominant spread F type between low and high European midlatitudes.
Trvalý link: http://hdl.handle.net/11104/0283557