Weimer电场模式在地球磁层内的特征  

The characteristics of the model of Weimer's electric field within the magnetosphere

作　　者：张华[1,2] 徐荣栏[1,3] 赵华[1] 沈超[1] 

机构地区：[1]中国科学院空间科学与应用研究中心空间天气学国家重点实验室,北京100190 [2]中国科学院研究生院,北京100049 [3]澳门科技大学

出　　处：《地球物理学报》2012年第1期36-45,共10页Chinese Journal of Geophysics

基　　金：国家自然科学基金(40974101;40704032);国家基础研究项目"973计划"(2011CB811404);空间天气学国家重点实验室专项基金资助

摘　　要：地球磁层中的电场是研究磁层物理的重要参数,目前常用的对流电场有均匀晨昏电场和投影电场.电离层电场可以看做磁层电场沿磁力线在电离层的投影,本文选取的电离层电场模型为Weimer(2001模式)电场.利用T96磁场模式,沿磁力线将电离层电场投影到磁层空间,得到一个新的磁层电场模式,并讨论了磁暴、行星际磁场(IMF)、太阳风参数和亚暴等对磁层电场的影响.利用该模型计算的电场结果与卫星探测结果相符.Global electric field within magnetosphere is an important parameter to research magnetospheric physics. At present, average dawn-dust electric field and projected electric field as convection electric field within magnetosphere are applied usually in space physics. In this paper, we adopted Weimerrs electric field as the mode of ionospheric electric field. Then, we projected the ionospheric electric field to magnetospheric space along lines of magnetic force of T96, and got a new model of magnetospheric electric field. We also discussed the impact of magnetic storm, IMF, solar wind parameters, and substorm on magnetospheric electric field The computing result of this model was consistent with the results detected by satellites.

关 键 词：对流电场 IMF时钟角 磁轴倾角 Weimer电场 

分 类 号：P353[天文地球—空间物理学]