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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Reexamination of the S_q-EEJ relationship based on extended magnetometer networks in the east Asian region
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Reexamination of the S_q-EEJ relationship based on extended magnetometer networks in the east Asian region

机译：复审S_q-EEJ关系的基础上延长磁强计网络在东亚地区

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摘要

We reexamined the daily S_q-equatorial electrojet (EEJ) relationship based on these extended magnetometer networks in the east Asian region: (1) the Circum-pan Pacific Magnetometer Network (CPMN), (2) the International Real-time Magnetic Observatory Network (INTERMAGNET), and (3) the World Data Center for Geomagnetism, Kyoto (WDC). Daily variations of the geomagnetic field for geomagnetically quiet days (Kp ≤ 2+) from 1996 to 2005 were analyzed. Noontime eastward S_q current intensities were estimated by latitudinally integrating the north-south component of the S_q field. The corresponding EEJ intensities were estimated from the daily geomagnetic field variations observed at Davao station (dip latitude of –0.84°deg). We discovered that these intensities of daily S_q and EEJ are well correlated on a long-term basis (r = 0.80). The dependences on the solar activity (as indicated by F10.7) and season (the day number) of S_q and EEJ variations were examined. It was demonstrated that both daily S_q and EEJ intensities are correlated to F10.7 with similar sensitivities. F10.7 is known to show similar variations with solar EUV radiation which causes ionization and heating of the ionosphere. For seasonal dependence, both daily S_q and EEJ intensities show predominant semiannual variations with similar spring-fall asymmetry. The effect of seasonal changes of the EUV flux into the low-latitude ionosphere is considered. Our results indicate that the daily values of S_qand EEJ react, in the same manner, to temporal changes of solar ionization and heating of the ionosphere.
机译：我们重新审视了每日S_q-equatorial电喷流基于这些扩展(EEJ)的关系东亚地区的磁强计网络:(1) Circum-pan太平洋磁强计网络(CPMN),(2)国际实时磁天文台网络(INTERMAGNET),和(3)世界数据中心地磁学、京都(WDC)。地磁场的变化眼睛安静的日子(Kp≤2 +)从1996年到2005年进行了分析。由纬向强度估计集南北S_q的组件字段。估计从日常地磁场变化观察到达沃站(倾斜纬度-0.84°度)。日常S_q和EEJ的强度基于长期的相关(r = 0.80)。依赖性的太阳活动(如表示由F10.7)和(一天)的S_q和季节EEJ进行变化。每日S_q和EEJ强度相关F10.7与相似的敏感性。F10.7显示类似的变化太阳能EUV导致电离辐射和电离层加热。依赖,每日S_q和EEJ强度显示主要的半年一次的变化类似的spring-fall不对称。EUV通量的季节性变化低纬度电离层。结果表明,每日S_qand的价值观EEJ反应,以同样的方式,时间太阳能的电离和加热的变化电离层。

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