DOI: 10.1002/2013GL057933
论文题名: Ionospheric symmetry caused by geomagnetic declination over North America
作者: Zhang S.-R. ; Chen Z. ; Coster A.J. ; Erickson P.J. ; Foster J.C.
刊名: Geophysical Research Letters
ISSN: 0094-8457
EISSN: 1944-8188
出版年: 2013
卷: 40, 期: 20 起始页码: 5350
结束页码: 5354
语种: 英语
英文关键词: geomagnetic field
; midlatitude ionosphere
; thermospheric winds
; total electron content
Scopus关键词: Empirical Orthogonal Function
; Empirical orthogonal function decompositions
; Geomagnetic declination
; Geomagnetic fields
; Mid-latitude ionosphere
; Thermospheric winds
; Thermospheric zonal winds
; Total electron content
; Ionosphere
; Ionospheric measurement
; Orthogonal functions
; Solar energy
; Geomagnetism
; atmospheric electricity
; data set
; electron
; geomagnetic field
; GPS
; ionosphere
; zonal wind
; North America
英文摘要: We describe variations in total electron content (TEC) in the North American sector exhibiting pronounced longitudinal progression and symmetry with respect to zero magnetic declination. Patterns were uncovered by applying an empirical orthogonal function (EOF) decomposition procedure to a 12 year ground-based American longitude sector GPS TEC data set. The first EOF mode describes overall average TEC, while the strong influence of geomagnetic declination on the midlatitude ionosphere is found in the second EOF mode (or the second most significant component). We find a high degree of correlation between spatial variations in the second EOF mode and vertical drifts driven by thermospheric zonal winds, along with well-organized temporal variation. Results strongly suggest a causative mechanism involving varying declination with longitude along with varying zonal wind climatology with local time, season, and solar cycle. This study highlights the efficiency and key role played by the geomagnetic field effect in influencing mesoscale ionospheric structures over a broad midlatitude range. Key Points 12-year GPS TEC for North America analyzed, using empirical orthogonal function. Pronounced longitudinal progression and symmetry with clear temporal variation TEC variations are highly correlated to zonal-wind driven vertical drifts ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84886033513&doi=10.1002%2f2013GL057933&partnerID=40&md5=fdc7148108bfeb9f3e8f431021605702
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5721
Appears in Collections: 气候减缓与适应
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作者单位: Haystack Observatory, Massachusetts Institute of Technology, Off Route 40, Westford, MA 01886, United States
Recommended Citation:
Zhang S.-R.,Chen Z.,Coster A.J.,et al. Ionospheric symmetry caused by geomagnetic declination over North America[J]. Geophysical Research Letters,2013-01-01,40(20).