TIME3D-IGGCAS: A new three-dimension mid- and low-latitude theoretical ionospheric model in realistic geomagnetic fields
TIME3D-IGGCAS: A new three-dimension mid- and low-latitude theoretical ionospheric model in realistic geomagnetic fields
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DOI：
10.1016/j.jastp.2012.02.001
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发表时间：
2012-05
影响因子：
1.9
通讯作者：
Z. Ren;W. Wan;Libo Liu;H. Le
中科院分区：
文献类型：
--
作者：
Z. Ren;W. Wan;Libo Liu;H. Le
在前人工作的基础上，建立了一个新的地磁场三维中低纬理论电离层模型--中国科学院地质与地球物理研究所的地球三维理论电离层模型(TIME3D-IGGCAS)。这个新模型覆盖了中低纬电离层和整个等离子体层。它自洽地求解电子和离子的质量连续性、运动和能量方程，给出了现实地磁场中电离层和等离子体层主要参数的随时间变化的三维结构，包括O+、H+、He+、NO+、O2+、N2+和电子的离子数密度；电子和离子温度；以及离子速度矢量。我们在三月分日和六月至日进行了模拟，并将模拟结果与IRI经验模型的结果进行了比较。TIME3D-IGGCAS可以很好地再现所有模拟中的主要电离层特征。我们还模拟了不同类型地磁场之间的电离层差异。结果表明，地磁场构型对电离层等离子体密度有明显影响，实际地磁场中的NmF2与倾斜偶极子磁场中的NmF2相差可达40%以上。
Based on the previous work, a new three-dimension mid- and low-latitude theoretical ionospheric model in realistic geomagnetic fields is developed, named Three-Dimension Theoretical Ionospheric Model of the Earth in the Institute of Geology and Geophysics, Chinese Academy of Sciences (TIME3D-IGGCAS). This new model covers the mid- and low-latitude ionosphere and whole plasmasphere. It self-consistently solves the equations of mass continuity, motion and energy of electron and ions to give out the time-dependent three-dimensional structures of the main ionospheric and plasmaspheric parameters in realistic geomagnetic fields, including ion number densities of O+, H+, He+, NO+, O2+, N2+and electron; electron and ion temperature; and ion velocity vectors. We carry out simulations in March Equinox and in June Solstice, and compare the simulated results with that from IRI empirical model. TIME3D-IGGCAS can well reproduce the main ionospheric features in all simulations. We also simulate the ionospheric differences between different kinds of geomagnetic fields. The results suggest that the geomagnetic field configuration obviously affect the ionospheric plasma density, and the differences between NmF2 in realistic geomagnetic fields and that in tilted dipole fields can be larger than 40%.