Influence of Solar Rotation Influence on Ionospheric/Thermospheric Parameters: Modeling and Observations for Case Studies

TY - GEN

T1 - Influence of Solar Rotation Influence on Ionospheric/Thermospheric Parameters

T2 - 2019 PhotonIcs and Electromagnetics Research Symposium - Spring, PIERS-Spring 2019

AU - Klimenko, M. V.

AU - Ratovsky, K. G.

AU - Themens, D.

AU - Yasukevich, A. S.

AU - Klimenko, V. V.

PY - 2019/6

Y1 - 2019/6

N2 - We investigated the effect of 27 day solar rotation on the thermosphere-ionosphere system at different latitudes using both model results and multi-instrumental observation data. Considered ionospheric stations (ionosondes, GPS receivers, ISR radars) were located from the middle to high latitudes in Northern hemisphere. We analyzed also TIMED/GUVI variations of the O/N2 ratio in the thermosphere. Three different temporal periods were considered: December 2012-January 2013; January 2014; June - July 2014. The Global Self-consistent Model of the Thermosphere, Ionosphere, and Protonosphere (GSM TIP) were used for interpretation of coupled processes in the thermosphere-ionosphere system during one solar rotation cycle. There is a distinct response of daytime ionospheric electron density to the 27-day variation in solar flux (F10.7). Using comparative and correlative analysis we revealed a delay in variation of modeled daytime critical frequency (foF2) and total electron content (TEC) with respect to F10.7 variation. According to model results variations in O/N2 ratio seems to be the main possible mechanism for this delay. Some model/data disagreement was discussed in context of importance of atmosphere-ionosphere coupling and geomagnetic control of ionospheric variability. Seasonal changes and difference between 27-day variation in foF2 and TEC were discussed.

AB - We investigated the effect of 27 day solar rotation on the thermosphere-ionosphere system at different latitudes using both model results and multi-instrumental observation data. Considered ionospheric stations (ionosondes, GPS receivers, ISR radars) were located from the middle to high latitudes in Northern hemisphere. We analyzed also TIMED/GUVI variations of the O/N2 ratio in the thermosphere. Three different temporal periods were considered: December 2012-January 2013; January 2014; June - July 2014. The Global Self-consistent Model of the Thermosphere, Ionosphere, and Protonosphere (GSM TIP) were used for interpretation of coupled processes in the thermosphere-ionosphere system during one solar rotation cycle. There is a distinct response of daytime ionospheric electron density to the 27-day variation in solar flux (F10.7). Using comparative and correlative analysis we revealed a delay in variation of modeled daytime critical frequency (foF2) and total electron content (TEC) with respect to F10.7 variation. According to model results variations in O/N2 ratio seems to be the main possible mechanism for this delay. Some model/data disagreement was discussed in context of importance of atmosphere-ionosphere coupling and geomagnetic control of ionospheric variability. Seasonal changes and difference between 27-day variation in foF2 and TEC were discussed.

UR - http://www.scopus.com/inward/record.url?scp=85082025561&partnerID=8YFLogxK

U2 - 10.1109/PIERS-Spring46901.2019.9017784

DO - 10.1109/PIERS-Spring46901.2019.9017784

M3 - Conference contribution

AN - SCOPUS:85082025561

T3 - Progress in Electromagnetics Research Symposium

SP - 3469

EP - 3473

BT - 2019 PhotonIcs and Electromagnetics Research Symposium - Spring, PIERS-Spring 2019 - Proceedings

PB - Institute of Electrical and Electronics Engineers (IEEE)

Y2 - 17 June 2019 through 20 June 2019

ER -