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

Gao Yu-fen   

  1. Institute of Geophysics, State Seismological Bureau, Beijing 100081
  • Received:1991-02-11 Revised:1900-01-01 Online:1992-04-24 Published:1992-04-24

Abstract: 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.

Key words: Heating rate, Coronal hole atmosphere