Is DE2 the source of the ionospheric wave number 3 longitudinal structure
Is DE2 the source of the ionospheric wave number 3 longitudinal structure
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DOI：
10.1029/2010ja015979
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发表时间：
2010-11
影响因子：
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通讯作者：
H. Kil;L. Paxton;W. Lee;Z. Ren;Seung-jun Oh;Y. Kwak
中科院分区：
文献类型：
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作者：
H. Kil;L. Paxton;W. Lee;Z. Ren;Seung-jun Oh;Y. Kwak
[1]通过研究等离子体密度和垂直E×B漂移中波3结构的年变化和日变化，研究了电离层等离子体密度中的波3(波3)纵向结构与向东传播的纬向波2号潮(DE2)之间的联系。为此，我们使用了1999年至2004年在Kp<；4条件下的中国一号卫星数据得到的平均等离子体密度和垂直离子速度。等离子体密度中波3纵向结构与垂直E×B漂移的良好相关性表明，垂直E×B漂移(或E区发电机电场)是产生波3等离子体密度结构的原因。等离子体密度和垂直E×B漂移中电离层波幅的年变化在12月和5月附近出现两个峰值，这与DE2波幅的年变化相一致。然而，电离层波-3结构的日变化并没有显示出DE2所预测的120°/24LT的东移。电离层波-3结构的幅度比通过比较DE3和DE2风的幅度而预测的要大。为了解释电离层波-3纵向结构的形成，除了DE2之外，另一种机制是必要的。
[1] This study examines the connection of the wave number 3 (wave-3) longitudinal structure in the ionospheric plasma density with diurnal eastward propagating zonal wave number 2 tide (DE2) by examining the annual and diurnal variations of the wave-3 structures in the plasma density and vertical E × B drift. For this purpose, we have utilized the mean plasma density and vertical ion velocity derived from the first Republic of China satellite data during 1999–2004 under Kp < 4 condition. Good correlation between the wave-3 longitudinal structures in the plasma density and vertical E × B drift indicates that the vertical E × B drift (or E-region dynamo electric field) is responsible for the creation of the wave-3 plasma density structure. The annual variation of the amplitude of the ionospheric wave-3 structure in the plasma density and vertical E × B drift shows two peaks near December and May, which is consistent with the annual variation of the DE2 amplitude. However, the diurnal variation of the ionospheric wave-3 structure does not show the eastward phase shift of 120°/24 LT that is predicted by DE2. The amplitude of the ionospheric wave-3 structure is greater than might be predicted by the comparison of the amplitude of the DE3 and DE2 winds. Another mechanism in addition to DE2 is necessary in order to explain the formation of the ionospheric wave-3 longitudinal structure.