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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Climatological response of Indian low-latitude ionosphere to geomagnetic storms
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Climatological response of Indian low-latitude ionosphere to geomagnetic storms

机译：印度低纬度气候的响应电离层对地磁风暴

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摘要

A climatological response of low-latitude ionosphere to geomagnetic storms is presented using long-term global ionospheric maps data from June 1998 to June 2015 covering two solar cycles 23 and 24. The results are presented for daytime forenoon and afternoon sectors under minor, moderate, and major ionospheric storm categories based on minimum Dst index criterion. For the first time the effectiveness of storms is identified using monthly standard deviation as an indicator of the day to day variability in equatorial and low-latitude ionosphere. Thus, results on climatology are definitive and form a database that would be comparable to statistical results from any other longitude and time. Seasonal statistics for total storms, effective positive and negative storms, and amplitude of mean seasonal perturbation in total electron content are obtained. Total and effective storms are found to be higher in solar cycle 23 than in 24 and only a couple of effective storms occurred during low solar activity 2007–2009 that too in minor category. Afternoon sector is found to be favorable for occurrence of maximum number of effective positive storms. A latitudinal preference is found for a given storm to be effective in either time sectors. Equinoctial asymmetry in ionospheric response both in terms of occurrence and perturbation amplitude is found. September equinoxes are found to bear maximum total, effective positive and negative storms. Winters are found more prone to negative storms, whereas summers have recorded minimum number of either of storms and minimum perturbation amplitudes.
机译：低纬度的气候响应电离层对地磁风暴使用长期全球电离层地图数据1998年6月到2015年6月覆盖两个太阳周期23和24。上午和下午部门在小,温和,和主要电离层风暴类别基于最小Dst指数标准。第一次风暴的效果使用月度标准差作为标识每天变化的指标赤道和低纬度电离层。结果气候学是明确的和形成数据库与统计结果从任何其他经度和时间。对总风暴,季节性统计有效积极的和消极的风暴和振幅意味着在总电子季节性扰动内容了。发现在太阳活动周期23高于在吗24,只有几个有效的风暴发生在2007 - 2009年太阳活动低,太小类别。有利于发生的最大数量有效的积极的风暴。偏好是发现对于一个给定的风暴有效的时间领域。不对称在电离层响应两个方面的发生和扰动振幅发现。最大总,有效的积极的和消极的风暴。风暴,而夏天则最低记录的风暴和最小的数量扰动振幅。

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