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Multiday thermospheric density oscillations associated with variations in solar radiation and geomagnetic activity
Xu, Jiyao; Wang, Wenbin; Zhang, Shunrong; Liu, Xiao; Yuan, Wei; Xu, J (reprint author), Chinese Acad Sci, State Key Lab Space Weather, Ctr Space Sci & Appl Res, Beijing, Peoples R China.
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2015
Volume120Issue:5Pages:3829-3846
ISSN2169-9380
Language英语
AbstractThermospheric densities observed by Challenging Minisatellite Payload and Gravity Recovery and Climate Experiment satellites during 2002-2010 and the globally averaged thermospheric densities from 1967 to 2007 have been used to investigate latitudinal, longitudinal, and height dependences of the multiday oscillations of thermospheric densities. The data show that the main multiday oscillations in thermospheric densities are 27, 13.5, 9, and 7 day oscillations. The high-correlation coefficients between the density oscillations and the F-10.7 or Ap index indicate that these oscillations are externally driven. The 27 day density oscillation, being the strongest, is induced by variations in solar radiation, as well as recurrent geomagnetic activity that is the result of corotating interaction regions (CIRs) and high-speed solar wind streams of coronal hole origin. Density oscillations at periods of 13.5, 9, and 7 days at solar minimum and during the declining phase are stronger than those at solar maximum. These oscillations are mainly associated with recurrent geomagnetic activity due to coronal hole high-speed streams and CIRs. The multiday, periodic oscillations of thermospheric density exhibit strong latitudinal and longitudinal variations in the geomagnetic coordinate and oscillate synchronously at different heights. Oscillations with zonal wave number 0 oscillate globally, whereas those with nonzero wave numbers are strong at high geomagnetic latitudes, and hemispherically asymmetric. They are stronger in the Southern Hemisphere. The spectral distributions of thermospheric densities at different heights have almost the same latitude and longitude structures, but the spectral magnitudes increase with height.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/4640
Collection空间科学部
Corresponding AuthorXu, J (reprint author), Chinese Acad Sci, State Key Lab Space Weather, Ctr Space Sci & Appl Res, Beijing, Peoples R China.
Recommended Citation
GB/T 7714
Xu, Jiyao,Wang, Wenbin,Zhang, Shunrong,et al. Multiday thermospheric density oscillations associated with variations in solar radiation and geomagnetic activity[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2015,120(5):3829-3846.
APA Xu, Jiyao,Wang, Wenbin,Zhang, Shunrong,Liu, Xiao,Yuan, Wei,&Xu, J .(2015).Multiday thermospheric density oscillations associated with variations in solar radiation and geomagnetic activity.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,120(5),3829-3846.
MLA Xu, Jiyao,et al."Multiday thermospheric density oscillations associated with variations in solar radiation and geomagnetic activity".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 120.5(2015):3829-3846.
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