• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Proceedings of the 32nd International Cosmic Ray Conference >Study of the Diurnal Variation of Cosmic Rays during Different Phases of Solar Activity
【24h】

Study of the Diurnal Variation of Cosmic Rays during Different Phases of Solar Activity

机译：太阳活动不同阶段宇宙射线日变化的研究

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The pressure-corrected hourly counting rate data of neutron monitor stations, situated indifferent latitudes, have been employed to study the variation of cosmic ray diurnal anisotropy for a longperiod of 44 years (1965-2008). Some of these neutron monitors are situated in low latitudes with high cut-offrigidity. Annual averages of the diurnal amplitudes and phases have been obtained for each station. It isfound that the amplitude of the diurnal anisotropy varies with a period of one (11 year) solar activity cycle,whereas the diurnal phase varies with a period of 22 years (one solar magnetic cycle). The annual averagediurnal amplitudes and phases have also been calculated by grouping the days on the basis of ascending anddescending periods of each solar cycle (cycles 20, 21, 22 and 23). The results indicate that the systematic andsignificant differences are observed in the diurnal variation between the descending periods of the odd andeven solar cycles. The overall vector averages of the descending period of the even solar cycles (20 and 22)show some - what smaller diurnal amplitude as compared to the vector averages of the descending period ofthe odd solar cycles (21 and 23). In contrast, we find a large diurnal phase shift to earlier hours during thedescending period of even solar cycles (20 and 22), as compared to almost no shift in the diurnal phaseduring the descending period of odd solar cycles. Further, we find that the overall vector average diurnalamplitude of the ascending period of odd and even solar cycles, remain invariant from one ascending periodsto the other, or even in between the even and odd solar cycles. However, we do find a significant diurnalphase shift to earlier hours during the ascending periods of odd solar cycles (21 and 23), in comparison tothe diurnal phase in the ascending periods of even solar cycles (20 and 22).
机译：位于不同纬度的中子监测站的压力校正小时计数率数据已被用于研究宇宙射线日各向异性的变化，这一变化持续了44年（1965-2008年）。这些中子监测仪中的一些位于低纬度和高截止偏航性。每个站的日均振幅和相位的年度平均值已经获得。研究发现，日向各向异性的幅度随着太阳活动周期的一（11年）周期而变化，而日相则随着太阳活动周期的22年（一个太阳磁周期）而变化。还通过根据每个太阳周期（周期20、21、22和23）的上升和下降时间对天数进行分组来计算年平均日振幅和相位。结果表明，在奇数和偶数太阳周期下降周期之间的日变化中观察到系统的和显着的差异。偶数太阳​​周期（20和22）下降周期的总体矢量平均值显示出-与奇数太阳周期（21和23）下降周期的矢量平均值相比，日振幅小得多。相比之下，与奇数太阳周期下降期间的昼夜相差几乎没有变化相比，我们发现在偶数太阳周期（20和22）下降期中有较大的昼夜相移。此外，我们发现奇数和偶数太阳周期的上升周期的总体矢量平均双振幅，从一个上升周期到另一个上升周期，甚至在偶数和奇数太阳周期之间，都保持不变。然而，与偶数太阳周期（20和22）的上升周期中的昼夜相相比，我们确实发现在奇数太阳周期（21和23）的上升周期中有明显的昼夜相移到更早的时间。

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