Study on the Couplings of Heliosphere-Magnetosphere-Ionosphere-Atmosphere by Global Sq Current Observation

在地磁平静的条件下，已知地面观测站的地磁场每日记录显示出规律性的日变化，主要由24、12、8和6小时的频谱分量组成。一百多年来，人们一直在广泛地研究这种有规律的日变化，以便研究它的源电流(见Campbell[1989a])。然而，为了理解磁层-电离层-大气-地球(MIAE)电磁系统之间的电磁耦合，我们必须弄清电离层磁层对各种太阳风变化的电磁响应，以及DP2-ULF距离扰动从太阳风区向赤道电离层渗透和传播的机制。在这项研究中，我们利用MAGDAS/CPMN资料仔细研究了MIAE系统对各种空间扰动和与气候现象有关的局部发电机扰动的短期和长期响应。

Under geomagnetically quiet conditions, a daily record of the geomagnetic field at ground observatories is known to show a regular daily variation, which is primarily composed of 24,12,8 and 6-hour spectral components. The regular daily variation has been extensively studied for more than one hundred years in order to investigate its source currents (see Campbell [1989a]). However, in order to understand electromagnetic coupling between magnetosphere-ionosphere-atmosphere and Earth(MIAE) electromagnetically system, we have to clarify the electro-magnetic response of iono-magnetosphere to various solar wind changes, and the penetration and propagation mechanisms of DP2-ULF range disturbances from the solar wind region into the equatorial ionosphere. In this study we carefully investigate a short and long-term response of MIAE system for various space disturbances and for local dynamo disturbances relating climatological phenomena by using MAGDAS/CPMN data.