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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Global Distribution of Nighttime MSTIDs and Its Association With E Region Irregularities Seen by CHAMP Satellite
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Global Distribution of Nighttime MSTIDs and Its Association With E Region Irregularities Seen by CHAMP Satellite

机译：全球夜间MSTIDs及其分布协会与E地区看到的违规行为CHAMP卫星

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摘要

We investigate the correlation of sporadic E (Es) with the occurrence of medium-scale traveling ionospheric disturbances (MSTIDs) at night in middle latitudes (25°-40°N and 25°-40°S magnetic latitudes) by examining their occurrence climatology. The occurrence climatology of Es and MSTIDs is derived using the Challenging Minisatellite Payload satellite data acquired in 2001-2008 and 2001-2009, respectively. Electron density irregularities and radio scintillations are used as the detection proxies of MSTIDs and Es, respectively. The occurrence rate of MSTIDs shows a semi-annual variation with the primary peak during June solstices and the secondary peak during December solstices in both hemispheres. However, the occurrence rate of Es shows a seasonal variation with a pronounced peak in summer in both hemispheres. The occurrence of MSTIDs during local summer and equinoxes is correlated with the occurrence of local Es, but the high occurrence rate of MSTIDs in local winter is not correlated with local winter hemisphere Es. MSTIDs in the winter hemisphere are correlated with magnetically conjugate MSTIDs in the summer hemisphere;these summer hemisphere MSTIDs are correlated with the occurrence of Es in the summer hemisphere. The occurrence rate of MSTIDs clearly shows an increase with decreasing solar activity, but the solar cycle dependence of Es is not obvious from the data. This observation suggests that the generation of MSTIDs is significantly affected by factors other than Es such as the growth rate of the Perkins instability, atmospheric gravity waves, and the F region conductance.
机译：我们研究的相关性分散E (Es)发生的中等规模的旅行电离层扰动(MSTIDs)晚上在中纬度地区(25°-40°N 25°-40°S磁纬度)通过检查他们的出现气候学。使用挑战MSTIDs派生Minisatellite载荷卫星数据获得的分别2001 - 2008和2001 - 2009。密度违规行为和无线电闪烁被用作MSTIDs和的检测代理吗分别Es。显示了一个半年度主要变化高峰在6月二至点和第二高峰在12月二至点在两个半球。然而,Es显示的发生率季节性变化明显的峰值夏天在两个半球。在当地夏季和春分和秋分MSTIDs与当地的发生,但是MSTIDs在当地的出现率高冬天不是与当地相关的冬天半球。与磁共轭MSTIDs吗夏天夏天半球;这些半球MSTIDs与Es的发生在夏天半球。MSTIDs清楚地显示了增加和减少太阳活动,但对太阳活动周期的依赖关系从数据Es不是显而易见的。表明MSTIDs的一代Es以外的因素影响如珀金斯的增长率不稳定,大气重力波,F区域电导。

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