Statistical Study of the Seasonal Variations in TEC Depletion and the ROTI during 2013-2019 over Hong Kong.
Statistical Study of the Seasonal Variations in TEC Depletion and the ROTI during 2013-2019 over Hong Kong.
复制标题
2013-2019年香港TEC消耗及ROTI季节变化统计研究
DOI：
10.3390/s20216200
复制
发表时间：
2020-10-30
期刊：
影响因子：
--
通讯作者：
Fang J
中科院分区：
文献类型：
--
作者：
Li Q;Zhu Y;Fang K;Fang J
赤道等离子体泡（EPBs）可以引起大的总电子含量（TEC）梯度幅度和显着的密度不规则性。本文利用2013年至2019年全球定位系统（GPS）-TEC时间序列识别了由EPB引起的损耗和不规则性，这些时间序列是从2013年至2019年香港附近的9个全球导航卫星系统（GNSS）站提取的。对TEC变化指数（ROTI）的日变化与EPB发生率、深度和持续时间的日变化进行了相关分析。每月的EPB发生率、深度、持续时间和ROTI表现出强烈的季节变化，在春分季节达到最大值，尤其是在2013-2016年太阳活动中到高的年份。此外，从2013年到2016年，可以清楚地看到这些参数的两个季节不对称性。EPB的发生率、深度和持续时间每年都随着10.7厘米（F10.7）指数的太阳射电通量而变化。EPB发生率，深度和持续时间的相关性分析发现，更强的相关性与F10.7指数的年度比每月的基础上。月变化的相关分析表明，太阳活动对EPB发生、深度和持续时间的影响具有季节性，在春分季节和夏季显著大于冬季。
Equatorial plasma bubbles (EPBs) can cause large total electron content (TEC) gradient magnitudes and significant density irregularities. In this paper, depletions and irregularities due to EPBs are identified by using the Global Positioning System (GPS)-TEC time series extracted from nine Global Navigation Satellite System (GNSS) stations over Hong Kong near the equatorial ionization anomaly (EIA) crest region from 2013 to 2019. The correlation analyses between the daily variation in the rate of TEC change index (ROTI) and that of the EPB occurrence rate, depth, and duration are presented. The monthly EPB occurrence rate, depth, duration, and ROTI show strong seasonal variations, with maxima during equinoctial seasons, especially during the moderate-to-high solar activity years of 2013–2016. Furthermore, two seasonal asymmetries can be clearly seen for these parameters from 2013 to 2016. The EPB occurrences rate, depth, and duration vary annually with the solar radio flux at 10.7 cm (F10.7) index. The correlation analyses of the EPB occurrence rate, depth, and duration are found to be much more strongly correlated with the F10.7 index on an annual basis than on a monthly basis. The correlation analysis of monthly variations shows the impacts of solar activity on EPB occurrence, depth, and duration are seasonally dependent, which is significantly greater in the equinoctial seasons and summer than in winter.
登录
查看更多内容
影响因子：
2.6
作者：
Acharya, Rajat;Majumdar, Saibal
通讯作者：
Majumdar, Saibal
影响因子：
3.3
作者：
Blanch, Estefania;Altadill, David;Orus-Perez, Raul
通讯作者：
Orus-Perez, Raul
影响因子：
2.8
作者：
Sultan, PJ
通讯作者：
Sultan, PJ
影响因子：
5.2
作者：
Pi, X;Mannucci, AJ;Ho, CM
通讯作者：
Ho, CM
影响因子：
2.8
作者：
Carrano, Charles S.;Groves, Keith M.;Rino, Charles L.
通讯作者：
Rino, Charles L.