摘要
地面Ｓｑ磁场的分析在一定程度上可揭示场向电流的存在，在赤道电射流区和低纬地区，某些日子的Ｙ分量或Ｄ分量Ｓｑ变化可明显地显示午间场向电流的存在。１９９０年１２月１１日Ｂａｃｌｉｅｕ，琼中、河内、Ｃｈａｐｓ、通海和成都等台的Ｓｑ（Ｄ）曲线清楚表明由冬季半球流向夏季半球的午间场向电流的影响。此外，本文还用（夏—冬）／２法分析了Ｓｑ（Ｚ）的资料，从中也可观察到午间及清晨场向电流的踪迹。
Analysis for the ground geomagnetic Sq variations enables us to infer to some extent the existence of interhemispheric field-aligned currents in the magnetosphere. In the equatorial electrojet region and the low-latitude region, the Sq variations of the east (Y) component or the D component on some particular days might reveal evidently the existence of the field-aligned currents near the noon meridian. The Sq (D) variations at the observatories on December 11,1990 in the 105°E longitude chain; consisted of Baclieu, Qiongzhou, Hanoi, Chapa, Toughai and Chengdu, indicated clearly the effect of fieldaligned currents; flowing from the winter hemisphere to the summer one, at the noon time.Moreover, the writer also analysed the(summer-winter)/2 data of Sq(Z), indicating the traces of field-aligned currents in the morning and near the noon meridian.
出处
《地震地磁观测与研究》
1996年第2期44-49,共6页
Seismological and Geomagnetic Observation and Research
关键词
地磁
静日变化
场向电流
电离层发电机
地磁场
solar quiet daily variations, field-aligned currents, lonosphere dynamo
