Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 33970 10.12737/stp-54201912 Results of current research Results of current research Results of current research Variations of ionospheric parameters over Almaty (Kazakhstan) in 1999–2013 Variations of ionospheric parameters over Almaty (Kazakhstan) in 1999–2013 Мукашева Сауле Нурмуханбетовна Mukasheva Saule Nurmuhanbetovna snmukasheva@gmail.com

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Капытин Виталий Иосифович Kapytin Vitaliy Iosifovich kaputinsanct@mail.ru

аспирант физико-математических наук;

graduate student of physical and mathematical sciences;

 Малимбаев Андрей Маратович Malimbayev Andrey Maratovich nanozavr@mail.ru

аспирант физико-математических наук;

graduate student of physical and mathematical sciences;

 Институт ионосферы Национальный центр космических исследований и технологий Алма-Ата Казахстан Institute of Ionosphere National Centre for Space Research and Technology Almaty Kazakhstan Институт ионосферы Национальный центр космических исследований и технологий Алма-Ата Казахстан Institute of Ionosphere National Centre for Space Research and Technology Almaty Kazakhstan Институт ионосферы Национальный центр космических исследований и технологий Алма-Ата Казахстан Institute of Ionosphere National Centre for Space Research and Technology Almaty Kazakhstan 5 4 91 96 https://naukaru.ru/en/nauka/article/33970/view

The paper presents the results of a study of the behavior of ionospheric parameters of the total electron content, I(t), and electron density in the maximum F2 layer, Nm, over Almaty (Kazakhstan) [43.25° N; 76.92° E] in 1999–2013. The time interval under study covers different solar activity levels. We have shown that at F10.7>175 in summer and at F10.7>225 in winter there is a saturation effect, i.e. with increasing solar activity level values of I(t) do not increase. The observed nonlinear relationship between the total electron content of the ionosphere and the solar radiation flux F10.7 results from the nonlinear relationship between the solar ultraviolet radiation and the solar radiation flux. The study of the variability of the mid-latitude ionosphere parameters during different solar and geomagnetic activity levels has shown that the standard deviation ç(x) and average shift Xave of I(t) and Nm fluctuations relative to the quiet level weakly depend on solar activity, but greatly depend on geomagnetic activity when F10.7<100.

The paper presents the results of a study of the behavior of ionospheric parameters of the total electron content, I(t), and electron density in the maximum F2 layer, Nm, over Almaty (Kazakhstan) [43.25° N; 76.92° E] in 1999–2013. The time interval under study covers different solar activity levels. We have shown that at F10.7>175 in summer and at F10.7>225 in winter there is a saturation effect, i.e. with increasing solar activity level values of I(t) do not increase. The observed nonlinear relationship between the total electron content of the ionosphere and the solar radiation flux F10.7 results from the nonlinear relationship between the solar ultraviolet radiation and the solar radiation flux. The study of the variability of the mid-latitude ionosphere parameters during different solar and geomagnetic activity levels has shown that the standard deviation ç(x) and average shift Xave of I(t) and Nm fluctuations relative to the quiet level weakly depend on solar activity, but greatly depend on geomagnetic activity when F10.7<100.

 total electron content solar activity ionosphere total electron content solar activity ionosphere

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