期刊
REMOTE SENSING
卷 14, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/rs14020369
关键词
ionospheric storm effect; mid-latitude trough; GPS TEC
类别
资金
- National Natural Science Foundation of China [41904142, 41822403, 41774165]
- National Key Research and Development Program [2017YFE0131400]
- Postdoctoral Innovation Project of Hubei Province [1232035]
- B-type Strategic Priority Program of the Chinese Academy of Sciences [XDB41000000]
- Youth Innovation Promotion Association CAS
This study investigates the features of the ionospheric mid-latitude trough over North America using MIT total electron content data. It is found that the mid-latitude trough position moves equatorward during geomagnetic storms and the ionospheric behavior around it displays three kinds of storm effects.
This study aims to investigate the features of the ionospheric mid-latitude trough over North America by using the MIT total electron content data obtained during three geomagnetic storms that occurred in August 2018, September 2017, and March 2015. The mid-latitude trough position sharply moves equatorward from the quiet-time subauroral latitude to mid-latitude with the decrease in SYM-H during geomagnetic storms. We find that the ionospheric behavior of TEC around the mid-latitude trough position displays three kinds of ionospheric storm effect: negative ionospheric storm effect, unchanged ionospheric behavior, and positive ionospheric storm effect. These ionospheric storm effects around the mid-latitude trough position are not always produced by the mid-latitude trough. The ionospheric storm effects produced by the mid-latitude trough are limited in the narrow mid-latitude trough regions, and are transmitted to other regions with the movement of the mid-latitude trough.
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