【作者】 孙炜； L.C.Lee； S.-I.Akasofu； Y.Kamide；

【Author】 Wei Sun~①L.C.Lee S.-I.Akasofu. (Geophysical Institute and Department of Space Physics and Atmospheric Sciences,University of Alaska,Fairbanks) Y.Kamide (Kyoto Sangyo University,Kyoto,Japan)

【机构】 美国阿拉斯加大学地球物理研究所和空间物理、大气科学系； 中国科学院地球物理研究所； 日本京都大学；

【摘要】 原始对计算高纬三维电流体系的KRM模式假定场向电流是沿径向的直线.本文考虑场向电流沿真实的偶极子场线流动时,提出一个递推计算模式,以改进KRM的计算.更多还原

【Abstract】 The algorithm developed by Kamide,Richmond and Matsushita(KRM) has been extensively used in estimating ionospheric electric fields,ionospheric currents,and field-aligned currents over the entire polar region from ground magnetic chain data with a time resolution of about 5 min.However,in the KRM and some other similar methods,geomagnetic field lines are assumed to be effectively radial,so that it is important to estimate errors resulting from such an assumption.In this paper,an iteration scheme is developed in which realistic curved geomagnetic field lines are employed.We have reestimated both the ionospheric and field-aligned currents and found that the correction to the ionospheric currents and the field-aligned currents obtained from the KRM scheme is 5-20%in the high-latitude(60°-80°) region and is 15-35%in the middle latitude(<60°) region.更多还原