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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Unified PCN and PCS indices: Method of calculation, physical sense, and dependence on the IMF azimuthal and northward components
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Unified PCN and PCS indices: Method of calculation, physical sense, and dependence on the IMF azimuthal and northward components

机译：统一PCN和pc指数:方法计算,物理意义上,和依赖国际货币基金组织(IMF)方位和向北组件

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摘要

The PC index estimates the polar cap magnetic activity generated by the solar wind and its embedded magnetic field. It shows a high degree of correlation with geophysical disturbance parameters characterizing the state of magnetosphere. After transition to 1-min PC index values, significant differences were revealed between the PCN and PCS indices, derived on the basis of magnetic data from Thule and Vostok stations, respectively. Differences in values of the 1-min PCN and PCS indices may give rise to discrepancy in results of various analyses and to quite erroneous physical conclusions. To eliminate any influence of the calculation technique on scientific results a unified method for derivation of the PC index was elaborated in the Arctic and Antarctic Research Institute (St. Petersburg) and Danish Meteorological Institute (Copenhagen), and new sets of the unified PCN and PCS indices were calculated. Under conditions of southward IMF the unified positive PCS and PCN indices are well consistent with one another in their value and behavior and linearly correlate with the solar wind merging electric field (MEF), irrespective of season. The IMF BY component is responsible for occurrence of the electric field MEF (and positive PC index) under conditions BZ > 0. Being proportional to MEF the PC index would be regarded as a measure of the interplanetary merging (geoeffective) electric field with the appropriate dimensionality of mV/m.
机译：PC指数估计极冠磁活动由太阳风及其生成嵌入的磁场。与地球物理相关的干扰参数描述的状态磁气圈。值,显示显著差异PCN和个人电脑之间的指标,派生的磁极北之地的数据和现象的基础分别站。的(PCN和pc指数可能产生差异在各种分析和结果完全错误的物理结论。消除任何计算的影响技术对科学结果一个统一的方法PC的派生指数了北极和南极研究所(St。彼得堡)和丹麦气象研究所(哥本哈根),新组统一PCN和电脑指数计算。南国际货币基金组织积极pc和PCN的统一指标都与彼此一致他们的价值和行为和线性相关的与太阳风合并电场(MEF),无论季节。负责出现的电场MEF(和积极的个人电脑指数)条件下BZ >0. 被视为衡量的星际合并(geoeffective)电场适当维数的mV / m。

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