Global ionospheric response to nonmigrating DE3 and DE2 tides forced from below
Global ionospheric response to nonmigrating DE3 and DE2 tides forced from below
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DOI：
10.1029/2010ja016099
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发表时间：
2011-05
影响因子：
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通讯作者：
P. Mukhtarov;D. Pancheva
中科院分区：
文献类型：
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作者：
P. Mukhtarov;D. Pancheva
[1]在本文中，我们提出的全球空间结构和COSMIC电子密度响应的季节变化，从2008年1月至2009年3月期间，从低于DE 3和DE 2潮汐强迫。利用固定高度和SABER温度下的COSMIC电子密度来确定电离层DE 3和DE 2潮汐对来自下方的DE 3和DE 2温度潮汐的响应。两个数据集的潮汐波已被提取由相同的数据分析方法。高度在450-500 km之间的电离层响应的纬度结构分布在倾角赤道两侧约±30°的修正倾角纬度处;在500 km以上，响应近似局限于赤道上方。两个高度区域的增强电离层响应被发现：上层响应（300公里以上）和底层一（低于250公里）;这两个区域被一个狭窄的高度带，没有潮汐响应。两个高度区域电离层响应的不同相位结构表明：（1）上水平响应主要是由于DE 3/DE 2调制的垂直等离子体漂移，（2）下水平响应是复杂的，并且很可能是由一种以上的机制引起的。
[1] In this paper we present the global spatial structure and seasonal variability of the COSMIC electron density response to the forced from below DE3 and DE2 tides during the period January 2008 to March 2009. The COSMIC electron density at fixed altitudes and SABER temperatures were utilized in order to define the ionospheric DE3 and DE2 tidal response to the DE3 and DE2 temperature tides coming from below. The tidal waves from both data sets have been extracted by the same data analysis method. The latitude structure of the ionospheric response for heights up to 450–500 km is distributed on both sides of the dip equator at about ±30° modified dip latitude; above 500 km the response is approximately confined over the equator. Two altitude regions of enhanced ionospheric response are found: an upper level response (above 300 km) and a bottom level one (below 250 km); the two regions are separated by a narrow altitude zone with no tidal response. The different phase structure of the ionospheric response in both altitude regions suggests that (1) the upper level response is mainly due to the DE3/DE2 modulated vertical plasma drift and (2) the bottom level response is complex and, in all likelihood, is caused by more than one mechanism.