首页> 外文期刊>Annales Geophysicae >Properties and geoeffectiveness of magnetic clouds in the rising, maximum and early declining phases of solar cycle 23
【24h】

Properties and geoeffectiveness of magnetic clouds in the rising, maximum and early declining phases of solar cycle 23

机译:太阳周期23上升,最大和下降早期的磁云性质和地球有效性

获取原文
           

摘要

The magnetic structure and geomagnetic response of 73 magnetic clouds (MC)observed by the WIND and ACE satellites in solar cycle 23 are examined. Theresults have been compared with the surveys from the previous solar cycles.The preselected candidate MC events were investigated using the minimumvariance analysis to determine if they have a flux-rope structure and toobtain the estimation for the axial orientation (θC, φC).Depending on the calculated inclination relative to the ecliptic we dividedMCs into "bipolar" (θC<45°) and "unipolar"(θCst<-50nT) while those with the field pointing northward did notcause magnetic storms at all. About half of the all identified MCs were notgeoffective or the sheath fields preceding the MC caused the storm. MCscaused more intense magnetic storms (Dst<-100nT) than moderatemagnetic storms (-50nT ≥Dst≥-100nT).
机译:研究了太阳周期23中WIND和ACE卫星观测到的73个磁云(MC)的磁结构和地磁响应。将结果与先前太阳周期的调查结果进行了比较。使用最小方差分析对预选的候选MC事件进行了研究,以确定它们是否具有磁通线结构,并获得轴向取向的估计值(θ C ,φ C )。根据相对于黄道的倾斜度,我们将MC分为“双极”(θ C <45°)和“单极”(θ< sub> C st <-50nT),而磁场指向北的那些则根本不会引起磁暴。在所有已识别的MC中,约有一半不是地电敏感的,或者MC之前的鞘层引起了风暴。 MC引起的磁暴( D st -100nT)比中等磁暴(-50nT≥ D st ≥ -100nT)。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号