Seeding equatorial spread F with turbulent gravity waves: Phasing effects
Seeding equatorial spread F with turbulent gravity waves: Phasing effects
复制标题
用湍流重力波传播赤道传播 F：相位效应
DOI：
10.1002/2014gl062348
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发表时间：
2015
影响因子：
5.2
通讯作者：
B. Laughman
中科院分区：
文献类型：
--
作者：
T.‐W. Wu;J. Huba;J. Krall;D. Fritts;B. Laughman
利用海军研究实验室（NRL）SAMI 3/赤道扩展F（ESF）三维电离层模式，研究了湍流重力波作用下，赤道F区大尺度等离子体泡的产生和发展过程.重力波湍流是从三维滞弹性有限体积模型中获得的。我们表明，在电离层共轭区域的重力波的相位可以增强（同相）或减少（异相）的有效种子的不稳定性。有效种子的非局部性质可能导致观察到的ESF的每日变异性。此外，我们发现，纬向和垂直风扰动与重力波是最有效的播种ESF泡沫;扰动的纬向风相对无效。
The Naval Research Laboratory (NRL) SAMI3/equatorial spread F (ESF) three‐dimensional ionosphere model is used to study the initiation and development of the large‐scale plasma bubbles in the postsunset equatorial F region by turbulent gravity waves. The gravity wave turbulence is obtained from a three‐dimensional anelastic, finite‐volume model. We show that the phasing of gravity waves at conjugate regions in the ionosphere can enhance (in phase) or reduce (out of phase) the effective seed of the instability. The nonlocalized nature of the effective seed may contribute to the observed day‐to‐day variability of ESF. Additionally, we find that the zonal and vertical wind perturbations associated with the gravity waves are most effective in seeding ESF bubbles; perturbations of the meridional wind are relatively ineffective.