单极磁区
The results of observation show: For large scale region, polar coronal hole is unipolar open field; For enhanced magnetic structures of 48h time scale, open field is dominant, however, the mixing case of open field and closed field is also present;
观测结果表明t就极无涧大尺度范围来看,是单极开放场I就48h时标的加强磁结构来说,以开放场为主的情况下,有开放场与闭合场栩混杂的情况。
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