Simulated longitudinal variations in the E-region plasma density induced by non-migrating tides
Simulated longitudinal variations in the E-region plasma density induced by non-migrating tides
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DOI：
10.1016/j.jastp.2011.12.004
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发表时间：
2012-12
影响因子：
1.9
通讯作者：
Z. Ren;W. Wan;Libo Liu;J. Xiong
中科院分区：
文献类型：
--
作者：
Z. Ren;W. Wan;Libo Liu;J. Xiong
基于GCITEM-IGGCAS模式和TIMED/SABER观测的潮汐资料，研究了非迁移潮汐引起的E区等离子体密度的纵向变化。模拟了E区等离子体密度的年内变化，发现在春分和夏至，E区等离子体密度都呈现出明显的波数-4的经向结构，而在夏至，E区等离子体密度呈现出明显的波数-3的经向结构。模拟结果表明，DE 3潮汐可以驱动E区等离子体密度的波数-4结构，而DE 2潮汐可以驱动波数-3结构。在低E区，O2+控制着总离子密度的纵向变化，而在高E区，NO+主要控制着总离子密度的纵向变化。O_2 ~+和NO ~+的纵向变化具有明显的相位差。
Based on the GCITEM-IGGCAS model and tides from TIMED/SABER observations, the longitudinal variations of the E-region plasma densities, which is induced by non-migrating tides, are investigated. We simulated the intra-annual variation of the E-region plasma density, and found that equinoctial E-region plasma density shows an obvious wavenumber-4 longitudinal structure both in Equinox and in June Solstice, and a wavenumber-3 longitudinal structure in December Solstice. Our simulations suggest that DE3 tide can drive the wavenumber-4 structure in E-region plasma density, and DE2 tide can drive the wavenumber-3 structure. O2+controls the longitudinal variations of total ions density at lower E-region, and NO+mainly controls that at higher E-region. We also noticed that the longitudinal variations of O2+and of NO+show obvious phase differences.