Traveling ionospheric disturbances associated with the tropospheric vortexes around Qinghai‐Tibet Plateau
Traveling ionospheric disturbances associated with the tropospheric vortexes around Qinghai‐Tibet Plateau
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DOI：
10.1029/1998gl900030
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发表时间：
1998-10
影响因子：
5.2
通讯作者：
W. Wan;Hong Yuan;B. Ning;Jun Liang;F. Ding
中科院分区：
文献类型：
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作者：
W. Wan;Hong Yuan;B. Ning;Jun Liang;F. Ding
为揭示华中地区电离层行波扰动（TID）与青藏高原地形涡旋的关系，利用高频多普勒天线阵的观测资料，对TID的波参数（频率、波数和传播方位）和激发源进行了统计分析。结果表明，观测到的TID主要沿东北（NE）和东南（SE）方向传播。后向射线追踪结果表明，东北和东南TID的震源分别位于青藏高原的东南边缘和东北边缘，在高原隆起地形的背风侧，更可能产生涡旋。TID源和低涡出现率的地理分布和季节变化非常一致，这说明TID源和低涡的激发与高原地形有关。
To show the relationship between the traveling ionospheric disturbances (TIDs) observed in Central China and the vortexes corresponding to the topography of Qinghai‐Tibet Plateau, the wave parameters (frequency, wavenumber and propagation azimuth) and the exciting sources of the TIDs are statistically analyzed under the base of observation of an HF Doppler array. It is found that the observed TIDs propagate mainly in the northeastward (NE) and southeastward (SE) directions. The backward ray tracing shows that the sources of NE and SE TIDs are respectively located in the southeastern and northeastern edges of Qinghai‐Tibet Plateau, i.e., in the lee sides of the bulging terrain of the plateau where the vortexes are more probably produced. The geographical distributions as well as their seasonal variations of the occurrence rate of both the TID sources and the vortexes are very coincident with each other, this leads us to suggest that the observed TIDs be excited by the tropospheric vortexes which in turn are related to the topography of the plateau.