A statistical study on the characteristics of ionospheric storms in the equatorial ionization anomaly region: GPS-TEC observed over Taiwan

J. Y. Liu, W. H. Yang, C. H. Lin, Y. I. Chen, I. T. Lee

研究成果: 雜誌貢獻期刊論文同行評審

22 引文 斯高帕斯(Scopus)

摘要

Positive and negative signatures of the ionospheric storms caused by the penetration electric field, disturbance dynamo, neutral wind, neutral composition, etc., have been reported. In this paper, the ionospheric total electron content (TEC) derived from the records of a network of ground-based GPS receivers in Taiwan is used to statistically study the characteristics such as local time of appearance and duration of the storm signatures of various casuals in the equatorial ionization anomaly (EIA) region during 1994-2003. A bias-corrected accelerated bootstrap method and a z test are employed for the first time to detect each event, and the overall storm signatures and characteristics, respectively. It is found that the positive signatures that appeared minutes to hours after the geomagnetic storm onset are pronounced on the storm day and the next day, while the negative signatures that started hours after the geomagnetic storm onset can last for as long as the next 4 days. The positive signature is statistically significant and most pronounced, when the intense geomagnetic storm onset occurs during local afternoon, which suggests that the signature may result from a combination of the prompt penetration electric field effect and mechanical effects of equatorward neutral wind. Additionally, the negative signature that is statistically significant and most pronounced in the local afternoon of the storm-onset day and/or the next day may be produced by the disturbance dynamo or overshielding effects. The long-lasting negative signature occurred in local midnight-noon period on days 2-4 after the storm onset may result from the neutral composition disturbances.

原文???core.languages.en_GB???
頁(從 - 到)3856-3865
頁數10
期刊Journal of Geophysical Research: Space Physics
118
發行號6
DOIs
出版狀態已出版 - 6月 2013

指紋

深入研究「A statistical study on the characteristics of ionospheric storms in the equatorial ionization anomaly region: GPS-TEC observed over Taiwan」主題。共同形成了獨特的指紋。

引用此