F2层临界频率的太阴半日周期扰动分析

Analysis on Lunar Half-day Disturbances in Critical Frequency of F2-layer

大气太阴潮汐对ES层和F2层有影响,在ES层和F2层的参数中均发现以太阴半日周期的振荡.通过分析中低纬地区10个台站F2层临界频率(foF2)的太阴半日分量变化,得到以下结论:foF2太阴半日潮有日变化和季节变化.不同的纬度,太阴半日潮的日变化、季节变化不同.武汉foF2太阴半日潮出现最强的月份、武汉中层低热层大气太阴半日潮汐风最强的月份、武汉ES层参数的太阴半日潮最大值出现的月份均相同,这表明,中层和低热层大气太阴半日潮汐和ES层、F2层的太阴半日潮汐有非常强的相关性.

There are effects of lunar atmosphere tide on Es-layer and F2-layer . Lunar half cycle disturbance is found in parameters of Es-layer and F2-layer. By means of analysis on the lunar halfday variations in the critical frequency of 10 stations in middle-low latitude region, the results show that the lunar semidiurnal tide in fo F2 （the critical frequency of F2-layer） has diurnal and seasonal variations. In different latitudes, the diurnal and seasonal variations of lunar semidiurnal tide in fo F2 are different. And the lunar semidiurnal tides in fo F2, Es and at MLT region in Wuhan station get the maximum values in the same month. It indicates that the lunar tides in regions of MLT, Es and F2 have very strong correlation.