globalchange  > 气候减缓与适应
DOI: 10.1029/2017JA025048
Scopus记录号: 2-s2.0-85046303483
论文题名:
Statistical Behavior of the Longitudinal Variations of the Evening Topside Mid-Latitude Trough Position in both Northern and Southern Hemispheres
作者: Yang N.; Le H.; Liu L.; Zhang R.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:5
起始页码: 3983
结束页码: 3997
语种: 英语
英文关键词: Ionosphere ; longitudinal variation ; mid-latitude trough ; topside ion density
英文摘要: Based on the nighttime ionosphere ion density data from the Defense Meteorological Satellite Program (DMSP) satellites in 1996–2016, we statistically analyzed the longitudinal variation of the mid-latitude trough position in the Northern and Southern hemispheres. The results show significant difference in the longitudinal variation of the trough position between the Northern and Southern hemispheres. In the Northern hemisphere, the trough position in the two longitudinal sectors of 60°W and 120°E is always located at higher latitudes than that in the other longitudinal sectors under most of time and solar and geomagnetic conditions. The longitudinal variation of trough position in the Northern hemisphere is mainly affected by season, solar activity level, and geomagnetic activity level. In the Southern hemisphere, the trough position in the western hemisphere is located at lower latitude than that in the eastern hemisphere in winter and at low solar activity level in equinox. At medium and high solar activity levels in equinox, the southern trough structure in the western hemisphere can't be identified, which also occurs in summer. The change in geomagnetic activity would cause the same movement of trough position in the Southern hemisphere in all longitude sectors at low solar activity level. Thus, the longitudinal variation of trough position in the Southern hemisphere is mainly affected by season and solar activity level. The longitudinal variation of the trough position may be associated with the longitudinal variation of the ion density at the equatorward/poleward side of the trough in the Northern and Southern hemispheres. ©2018. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113928
Appears in Collections:气候减缓与适应

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作者单位: Hubei Subsurface Multi-scale Imaging Key Laboratory, Institute of Geophysics and Geomatics, China University of Geosciences, Wuhan, China; Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; Institutions of Earth Science, Chinese Academy of Sciences, China; Beijing National Observatory of Space Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; University of the Chinese Academy of Sciences, Beijing, China

Recommended Citation:
Yang N.,Le H.,Liu L.,et al. Statistical Behavior of the Longitudinal Variations of the Evening Topside Mid-Latitude Trough Position in both Northern and Southern Hemispheres[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(5)
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