大气准两年振荡的电离层效应

THE IONOSPHERIC RESPONSE TO THE ATMOSPHERIC QUASI-BIENNIAL OSCILLATION

本文研究赤道异常逐日起伏程度的年变化规律,发现它与太阳活动及地磁活动呈微弱的负相关,但却受到QBO的明显调制,QBO东风相起伏加大,QBO西风相起伏减小.这一事实似乎表明,太阳爆发或磁暴不是产生赤道异常逐日起伏的主要原因;而上行行星波的扰动有可能是引起赤道异常逐日起伏的主要原因.

The yearly variation of the day-to-day variability of the equatorial anomaly have been investigated. It is revealed that this yearly variation is modulated by the QBO, (in east phase of the QBO the day-to-day variability of the equatorial anomaly increases, in west phase of the QBO it decreases), but negatively correlated with the solar activity. It implies that the day-to-day variability of the equatorial anomaly is not caused by the solar bursts and/or geomagnetic storms, but the disturbances of the upward propagating planetary waves. In contrast, the yearly intensity variation of the fluctuation (or day-to-day variability) of the f0F2 in middle latitude is not modulated by the QBO but correlated to the geomagnetic activity with solar cycle.