Sq（Y）的季节变化和场向电流

本文对中国东部地磁台站链地磁静日变化东向分量进行了分析,有结果表明,在冬、夏季清晨,南北半球之间存在着电离层发电机驱动的场向电流,其方向是从夏季半球到冬季半球;在黄昏,也可能存在方向相反的电流。

SEASONAL VARIATIONS OF Sq(Y) AND FIELD-ALIGNED CURRENTS

The seasonal variations of East component Sq(Y) observed by the geomagnetic observatory chain in the eastern part of China are analysed.It is found that some of field-aligned currents driven by ionospheric dynamo exist between south-north hemispheres in both winter and summer morning sectors.The direction of the currents is from summer hemisphere to winter hemisphere.It is possible that some reverse currents exist in the afternoon sector.