Equatorial spread F fossil plumes
Equatorial spread F fossil plumes
复制标题
赤道扩散 F 化石羽流
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
G. Joyce
中科院分区：
文献类型：
--
作者：
J. Krall;J. Huba;S. Ossakow;G. Joyce
抽象的。利用NRL SAMI3/ESF三维模拟程序研究了赤道扩展F(ESF)化石羽流的行为，即停止上升的ESF羽流。我们发现，化石气泡，即与化石羽流相关的等离子体密度损耗，即使在被纬向风吹起的同时，也可以作为高海拔赤道损耗而持续存在。在大多数情况下，相应的化石羽流的气辉代理图像，即电子密度与经度和纬度之间的曲线图，在大多数情况下都会被部分“填充”，从羽流中海拔最高的场线开始。具体地说，E场已完全降为零的场线受到影响，如果每条场线填充，则仅影响低海拔(≤600公里)部分。这表明，应该可以在高空观察到气辉图像不再显示耗尽的场线上的气泡。在所有情况下，当气泡上边缘内的通量管积分离子质量密度等于附近背景的离子质量密度时，ESF羽流停止上升，进一步支持Krall等人的结果。(2010b)。
Abstract. Behaviour of equatorial spread F (ESF) fossil plumes, i.e., ESF plumes that have stopped rising, is examined using the NRL SAMI3/ESF three-dimensional simulation code. We find that fossil bubbles, plasma density depletions associated with fossil plumes, can persist as high-altitude equatorial depletions even while being "blown" by zonal winds. Corresponding airglow-proxy images of fossil plumes, plots of electron density versus longitude and latitude at a constant altitude of 288 km, are shown to partially "fill in" in most cases, beginning with the highest altitude field lines within the plume. Specifically, field lines upon which the E field has fallen entirely to zero are affected and only the low altitude (≤600 km) portion if each field line fills in. This suggests that it should be possible to observe a bubble at high altitude on a field line for which the corresponding airglow image no longer shows a depletion. In all cases ESF plumes stop rising when the flux-tube-integrated ion mass density inside the upper edge of the bubble is equal to that of the nearby background, further supporting the result of Krall et al. (2010b).