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Observation of the ionosphere in middle latitudes during 2009, 2018 and 2018/2019 Sudden Stratospheric Warming events 

Zbyšek Mošna - Institute of Atmospheric Physics, Czech Academy of Sciences; Ilya Edemskij - Institute of Solar-Terrestrial Physics, Irkutsk, Russia; Jan Laštovička - Institute of Atmospheric Physics, Czech Republic; Michal Kozubek - Institute of Atmospheric Physics, Czech Republic; Petra Koucká Knížová - Institute of Atmospheric Physics, Czech Republic 

Session: Thermosphere-Ionosphere Interactions and Effects


Abstract

Three  Sudden Stratospheric Warming (SSW) events from the periods of low solar activity during 2008/2009, 2017/2018, and 2018/2019 were studied to evaluate the effects of the neutral atmosphere on the ionosphere. The main question is to what extent is the ionosphere responding on the SSW events.  The source of the data was ground based measurement using the Digisondes, and Total Electron Content (TEC) derived from the Global Navigation Satellite System (GNSS). In all three events the ionosphere response was demonstrated as an increase in total electron density and density around the peak height of the F2 region, presence of wave activity and changes in plasma drift behaviour. We presume that the strong ionospheric response in the F region was caused due to a combination of neutral atmosphere forcing and geomagnetic activity with different contribution of the drivers in individual events. 2008/2009 ionospheric response was predominantly influenced by the neutral lower atmosphere, and 2017/2018 and 2018/2019 as a combination of both effects.



Approaching deadlines:

Registration opens:

16 July 2020

Abstract submission opens:

16 July 2020

European Space Weather Medals:

6 September 2020

Registration deadline:

25 September 2020

Registration deadline: [extended]

10 October 2020

Abstract submission deadline:

4 September 2020