Physics of auroral phenomena : proceedings of the 33rd Annual seminar, Apatity, 02 - 05 March, 2010 / [ed.: A.G. Yahnin, A. A. Mochalov]. - Апатиты : Издательство Кольского научного центра РАН, 2011. - 206 с. : ил.

Testing o fthe Upper Atmosphere Model using the empirical ionospheric models July 2 300 E 2 0 0 ---------- \ ------ 1-------1------ 1-------|------ 1-------1------ 1-------1-------1-------1-------1 1 day 2 day 3day --------- IR1-2001 --------- UAM-MSIS ------ u — UAM-TT — * ---- Q-F2 UAM-MSIS-HWM Figure 2. The same as in Fig. 1, but for July 15, 1983. Conclusions All versions of the model calculations show a better agreement for winter solstice and spring equinox. The UAM version with the NRLMSISE-00 gives the best agreement with the F2-layer parameters calculated by the Q-F2 and IRI-2001 empirical models. The differences between all UAM results and the empirical models data for the night-time sector are explained by the variations of the thermospheric winds. The day-time values of the critical frequency of the F2-layer calculated by the fully theoretical UAM version are seen too low at the third day of calculation in all seasons. Such foF2 behaviour is related with increasing of the neutral poleward wind velocity at winter and summer solstices and decreasing of the ratio o f the concentrations О and N2 at spring equinox. The analysis of the model results for Irkutsk has given the same conclusions as for Slough. 123