Behavior of the F2 peak ionosphere over the South Pacific at dusk during quiet summer conditions from COSMIC data
Behavior of the F2 peak ionosphere over the South Pacific at dusk during quiet summer conditions from COSMIC data
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DOI：
10.1029/2008ja013308
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发表时间：
2008-12
影响因子：
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通讯作者：
A. Burns;Z. Zeng;Wenbin Wang;J. Lei;S. Solomon;A. Richmond;T. Killeen;Y. Kuo
中科院分区：
文献类型：
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作者：
A. Burns;Z. Zeng;Wenbin Wang;J. Lei;S. Solomon;A. Richmond;T. Killeen;Y. Kuo
[1] 气象、电离层和气候六卫星星座观测系统 (COSMIC) 任务利用掩星技术在全球范围内进行常规电离层测量。这些观测结果已用于本研究中，以绘制南（北）夏（冬）期间 NmF2 和 hmf2 的全球尺度气候图。似乎与南部赤道（阿普尔顿）异常有关的增强电子密度在黄昏时向南移动，并在大约一个小时内形成威德尔海异常。巧合的是，F2 峰的高度在该异常的北边界处增加。随着增强的电子密度向南移动，这种高度增加也向南移动，这表明电子密度的增加与 F2 峰的上升相关。这种现象本身就是一个有趣的现象，它可能为威德尔海异常的形成提供新的线索。从目前可用的数据中无法确定对这种行为的明确解释，但对一些可能性的检查表明，来自等离子体层的等离子体的晚上向下通量可能至少是造成这种现象的部分原因。
[1] The six-satellite Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) mission makes routine ionospheric measurements over the entire globe using occultation techniques. These observations have been used in this study to develop global-scale climate maps of NmF2 and hmf2 during the southern (northern) summer (winter). Enhanced electron densities that appear to be associated with the southern, equatorial (Appleton) anomaly are displaced far southward at dusk and, within about an hour, form the Weddell Sea anomaly. Coincidentally, the height of the F2 peak increases on the northern boundary of this anomaly. This height increase is also displaced southward as the enhanced electron densities are displaced southward, suggesting that the electron density increases are associated with the F2 peak rising. As well as being an interesting phenomenon in its own right, this behavior may shed new light on the formation of the Weddell Sea anomaly. No unambiguous explanation for this behavior can be determined from the data presently available, but an examination of some possibilities suggests that an evening downward flux of plasma from the plasmasphere may be at least partly responsible for the phenomenon.