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Characteristics and mechanisms of the annual asymmetry of thermospheric mass density
Ma RuiPing; Xu JiYao; Wang WenBin; Chen GuangMing; Yuan Wei; Lei JiuHou; Burns, Alan G.; Jiang GuoYing; Xu, JY (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China.
Department空间科学部
Source PublicationSCIENCE CHINA-EARTH SCIENCES
2015
Volume58Issue:4Pages:540-550
ISSN1674-7313
Language英语
KeywordAnnual Asymmetry Of Thermospheric Mass Density Solar Euv Radiation Sun-earth Distance
AbstractIn this paper, globally-averaged, thermospheric total mass density, derived from the orbits of similar to 5000 objects at 250, 400, and 550 km that were tracked from 1967 to 2006, has been used to quantitatively study the annual asymmetry of thermospheric mass density and its mechanism(s). The results show that thermospheric mass density had a significant annual asymmetry, which changed from year to year. The annual asymmetry at the three altitudes varied synchronously and its absolute value increased with altitudes. The results suggest that there is an annual asymmetry in solar EUV radiation that is caused by the difference in the Sun-Earth distance between the two solstices and the random variation of solar activity within a year. This change in radiation results in an annual change in the thermospheric temperature and thus the scale height of the neutral gas, and is the main cause of the annual asymmetry of thermospheric mass density. The annual asymmetry of mass density increases with altitude because of the accumulating effect of the changes in neutral temperature and scale height in the vertical direction.
Indexed BySCI ; EI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/4599
Collection空间科学部
Corresponding AuthorXu, JY (reprint author), Chinese Acad Sci, Ctr Space Sci & Appl Res, State Key Lab Space Weather, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Ma RuiPing,Xu JiYao,Wang WenBin,et al. Characteristics and mechanisms of the annual asymmetry of thermospheric mass density[J]. SCIENCE CHINA-EARTH SCIENCES,2015,58(4):540-550.
APA Ma RuiPing.,Xu JiYao.,Wang WenBin.,Chen GuangMing.,Yuan Wei.,...&Xu, JY .(2015).Characteristics and mechanisms of the annual asymmetry of thermospheric mass density.SCIENCE CHINA-EARTH SCIENCES,58(4),540-550.
MLA Ma RuiPing,et al."Characteristics and mechanisms of the annual asymmetry of thermospheric mass density".SCIENCE CHINA-EARTH SCIENCES 58.4(2015):540-550.
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