收稿日期: 2004-04-19
网络出版日期: 2005-03-15
基金资助
SupportedbytheNationalNaturalScienceFoundationofChina (4 9834030 ;40336053) ;theStateMinistryofScienceandTechnologyofChina(G2000078405)andtheChineseAcademyofSciences (CKZCX2SW136)
Comprehensive Studies on Magnetic Clouds in Interplanetary Space and their Associated Events
Received date: 2004-04-19
Online published: 2005-03-15
根据SOHO飞船上的LASCO和EIT探测器和GOES卫星的关于太阳活动的观测资料以及ACE和Wind飞船在地球轨道附近关于太阳风等离子体和行星际磁场的观测数据,分析了日冕物质抛射(CME)、行星际磁云和地磁暴的相关性.包括具有地磁效应的晕状CME的日面源区位置分布,日冕物质抛射的中等周期分析,产生地磁暴的行星际参数的阈值等等.作为行星际复杂抛射的一种,首次提出了多重磁云的概念.通过分析观测事例,总结出了多重磁云的一些观测特征,并认为其具有潜在的强大的地磁效应.此外,利用观测资料,研究了激波进入磁云并引起地磁暴的现象.通过建立简单的理论模型,初步分析了激波在穿越磁云的过程中,所能引起的地磁暴的强度的变化
汪毓明 , 王水 . 行星际磁云及其相关事件的综合研究(英文)[J]. 中国科学院大学学报, 2005 , 22(2) : 248 -254 . DOI: 10.7523/j.issn.2095-6134.2005.2.019
The relationships between the coronal mass ejections (CMEs), interplanetary disturbances and geomagnetic storms are studied, involving the solar source distribution of geoeffective halo CMEs, the periodicity of CMEs, X-ray flares and geomagnetic disturbances, the threshold of interplanetary parameters in causing geomagnetic storms, etc. As a kind of interplanetary complex structure, multiple magnetic cloud (Multi-MC) is proposed for the first time, which probably has strong geoeffectiveness.Based on the observations, some primary characteristics of Multi-MC are summarized. Moreover, the phenomenon of a shock advancing into a preceding magnetic cloud has been investigated as well as its potential geoeffectiveness. A simple theoretical model is developed to estimate the intensity of geomagnetic storm when a shock is entering a preceding cloud.
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