THE EFFECT OF SOLAR ACTIVITY ON THE NmF2 AT ZHONGSHAN STATION

doi:10.3724/SP.J.1084.2013.00142

Abstract

Abstract: We investigated the solar activity dependence of the ionospheric F2 peak electron density (N_mF2) at Zhongshan Station from 1995 to 2006. We found that N_mF2 increased linearly with solar activity indices. There were also correlations between N_mF2, local time and seasonal changes. Diurnally, N_mF2 was maximal at magnetic noon, larger than other time obviously. There was a weak relationship between N_mF2 and solar activity during the night, with almost no change over time. Annually, the maximum correlation appeared during the equinoxes. There were double peak values in the equinoxes, which were even greater than in the summer of the southern hemisphere. The changes in the slope were relatively smooth in the summer of the southern hemisphere. In the southern hemisphere winter, there was only a change in the slope near the magnetic noon, with almost no changes at other times. At Zhongshan Station, there was usually a strong linear relationship between N_mF2 and P. There was no obvious saturation or amplification effect at Zhongshan compared with middle and low latitudes. We analyzed possible reasons for the N_mF2 variations, linked to the special geographic latitude of the Zhongshan Station.

Key words: ionosphere, F2 layer peak electron density, solar 10.7 cm radio flux

Xu Sheng，Zhang Beichen，Guo Lixin，Liu Ruiyuan，Liu Junming，Wu Yewen，Hu Hongqiao，Huang Dehong. THE EFFECT OF SOLAR ACTIVITY ON THE N_mF2 AT ZHONGSHAN STATION[J]. ADVANCES IN POLAR SCIENCE, 2013, 25(2): 142-149.

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THE EFFECT OF SOLAR ACTIVITY ON THE N_mF2 AT ZHONGSHAN STATION

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