Some features of nighttime enhancements in the electron concentration in the F2-layer maximum of the midlatitude ionosphere |
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| Authors: | A F Yakovets V V Vodyannikov G I Gordienko Yu G Litvinov |
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| Institution: | 1. Institute of the Ionosphere, National Center of Space Research and Technologies, Kamenskoye Plato, Almaty, 050020, Republic of Kazakhstan
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| Abstract: | Using the data of vertical sounding of the ionosphere in Alma-Ata (76°55′ E, 43°15′ N) conducted in 2002–2012, the reaction of parameters of the ionospheric F2 layer to various types of nighttime enhancements in the electron concentration in the maximum of the layer (NmF2) was studied, including the height of the maximum and bottom of the layer, its semithickness, and electron concentration at some fixed heights. Examples of recordings of a combination of the enhancements caused by different mechanisms are presented. The similarity of the reaction of the F2-layer parameters to the nighttime enhancements caused by the rise of the layer and plasma flux from the protonosphere and passage of large-scale travelling ionospheric disturbances was found. Difficulties in identifying these two events in the case of their equal duration are noted. The difference in the reaction of the F2-layer parameters to the enhancements caused by the rise of the layer and plasma fluxes from the protonosphere and occurrence of the summer midlatitude ionospheric anomaly is shown. |
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