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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Characteristics of global plasmaspheric TEC in comparison with the ionosphere simultaneously observed by Jason-1 satellite
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Characteristics of global plasmaspheric TEC in comparison with the ionosphere simultaneously observed by Jason-1 satellite

机译：全球plasmaspheric TEC的特征同时与电离层观察到jason - 1号卫星

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摘要

We compared the global plasmaspheric total electron content (pTEC) with the ionospheric TEC (iTEC) simultaneously measured by Jason-1 satellite during the declining phase of solar cycle 23 (2002-2009) to investigate the global morphology of the plasmaspheric density in relation to the ionosphere. Our study showed that the plasmaspheric density structures fundamentally follow the ionosphere, but there are also significant differences between them. Although the diurnal variations are very similar to each region, the plasmasphere shows much weaker variations, only approximately 1 TECU day-night difference. By analyzing the day-night differences in the plasmasphere, we found that the plasmaspheric contribution to the nighttime ionosphere does not increase with solar activity and the largest contribution occurs during June solstice. The plasmasphere shows similar seasonal variations to the ionosphere, except for the semiannual variation, which is essentially absent in the plasmasphere. There is also an important difference in the annual variation: although the annual variation in the ionosphere exists regardless of longitude, it occurs only at American sector in the plasmasphere. As solar activity increases to moderate level, the pTEC substantially enhances from approximately 2 to 4 TECU at the initial increase of solar activity below F10.7p = 100 and then quickly slows down while the iTEC almost linearly enhances. Although it is well known that magnetic storms are the major source of plasmaspheric density depletion, pTEC does not show this aspect of the plasmasphere probably due to the relatively small K_p values for high magnetic activity (K_p > 2.5) in the current study.
机译：我们比较了全球plasmaspheric总数电离层TEC的电子内容(pTEC)由jason - 1号(通过同时测量卫星在下降阶段的太阳能周期23(2002 - 2009)调查全球plasmaspheric密度的形态关系到电离层。plasmaspheric密度结构从根本上遵循电离层,但他们之间也有显著差异。尽管昼夜变化非常相似每个地区,等离子体层显示较弱的变化,只有大约1特昼夜差异。不同的等离子体层,我们发现夜间plasmaspheric贡献电离层与太阳活动不会增加发生在6月和最大的贡献冬至。电离层变化,除了半年一次的变化,基本上是没有的在等离子体层。年变化差异:尽管年度电离层的变化存在不管经度,它只发生在美国部门的等离子体层。中度活动增加,pTEC大大增强了从大约2到4特在太阳活动的初始增加下面F10.7p = 100,然后迅速放缓而伊特几乎线性增强。众所周知,磁性风暴plasmaspheric密度损耗的主要来源,pTEC不显示这方面的等离子体层可能由于相对较小K_p值高磁场活动(K_p > 2.5)在当前的研究中。

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