Modelling the tongue-of-ionisation using CTIP with SuperDARN electric potential input: verification by radiotomography
Modelling the tongue-of-ionisation using CTIP with SuperDARN electric potential input: verification by radiotomography
复制标题
使用 CTIP 和 SuperDARN 电位输入对电离舌进行建模：通过放射断层扫描进行验证
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
J. Secan
中科院分区：
文献类型：
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作者：
S. E. Pryse;E. Whittick;A. Aylward;H. Middleton;Daniel S. Brown;M. Lester;J. Secan
摘要。利用superdamn雷达网络获得的电势图作为输入，建立了热层-电离层-等离子层耦合模式，以改进电离层等离子体在高纬度地区的空间分布模式。考虑了两个案例研究，一个是在稳定的IMF Bz负条件下，另一个是在稳定的IMF Bz正条件下。将模拟的等离子体分布与先前在多仪器研究中解释的成熟层析重建集进行比较。在IMF Bz为负的情况下，模型和观测结果都显示在夜侧有一个电离舌，电子密度和舌的位置之间有很好的一致性。在Bz为正的情况下，superdamn输入允许模型重现类似于观测到的空间等离子体分布。在这种情况下，等离子体不能穿透极帽的边界进入极帽，被围绕极帽外围的电离舌状对流所吸引。
Abstract. Electric potential patterns obtained by the SuperDARN radar network are used as input to the Coupled Thermosphere-Ionosphere-Plasmasphere model, in an attempt to improve the modelling of the spatial distribution of the ionospheric plasma at high latitudes. Two case studies are considered, one under conditions of stable IMF Bz negative and the other under stable IMF Bz positive. The modelled plasma distributions are compared with sets of well-established tomographic reconstructions, which have been interpreted previously in multi-instrument studies. For IMF Bz negative both the model and observations show a tongue-of-ionisation on the nightside, with good agreement between the electron density and location of the tongue. Under Bz positive, the SuperDARN input allows the model to reproduce a spatial plasma distribution akin to that observed. In this case plasma, unable to penetrate the polar cap boundary into the polar cap, is drawn by the convective flow in a tongue-of-ionisation around the periphery of the polar cap.