Simulations of the ionospheric annual asymmetry: Sun-Earth distance effect

doi:10.1002/2017JA024188

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院地球与行星物理重点实验室

	Simulations of the ionospheric annual asymmetry: Sun-Earth distance effect
	Dang, Tong 1,2,3; Wang, Wenbin 3; Burns, Alan 3; Dou, Xiankang 1,4; Wan, Weixing 5; Lei, Jiuhou 1,4
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2017-06-01
卷号	122 期号:6 页码:6727-6736
ISSN号	2169-9380
DOI	10.1002/2017JA024188
文献子类	Article
英文摘要	It has been suggested that the difference of the Sun-Earth distance between the December and June solstices has a great impact on the ionospheric annual asymmetry. In this study, the physical mechanisms of the Sun-Earth distance effects on the ionospheric annual asymmetry are investigated using Thermosphere-Ionosphere Electrodynamics General Circulation Model simulations. The main findings are the following: (1) The Sun-Earth distance affects the ionospheric annual asymmetry mainly through photochemical processes. (2) During the daytime, this photochemical process results from the combined effect of ionization rate of atomic oxygen and the recombination with neutral species. The solar irradiation variation between December and June directly leads to about 6% December-June electron density difference via ionization of atomic oxygen, whereas the recombination with neutral composition contributes to 12%-15% December-June electron density difference. (3) In the plasma fountain-prominent region (between 20 degrees and 40 degrees magnetic latitude), ambipolar diffusion can also be modulated by the Sun-Earth distance effect and contribute to the ionospheric annual asymmetry. (4) During the nighttime, the Sun-Earth distance effect impacts the annual asymmetry by changing thermospheric composition and ionospheric diffusion.
WOS关键词	GENERAL-CIRCULATION MODEL ; LATENT-HEAT RELEASE ; UPPER-ATMOSPHERE ; THERMOSPHERE ; F2-LAYER ; MIDDLE ; TIDES
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000405534800056
资助机构	National Natural Science Foundation of China(41325017 ; Thousand Young Talents Program of China ; National Science Foundation ; 41421063) ; National Natural Science Foundation of China(41325017 ; Thousand Young Talents Program of China ; National Science Foundation ; 41421063) ; National Natural Science Foundation of China(41325017 ; Thousand Young Talents Program of China ; National Science Foundation ; 41421063) ; National Natural Science Foundation of China(41325017 ; Thousand Young Talents Program of China ; National Science Foundation ; 41421063)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/43598]
专题	地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者	Lei, Jiuhou
作者单位	1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Geospace Environm, Hefei, Peoples R China 2.Univ Sci & Technol China, Mengcheng Natl Geophys Observ, Hefei, Peoples R China 3.Natl Ctr Atmospher Res, High Altitude Observ, Pob 3000, Boulder, CO 80307 USA 4.Collaborat Innovat Ctr Astronaut Sci & Technol, Harbin, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Dang, Tong,Wang, Wenbin,Burns, Alan,et al. Simulations of the ionospheric annual asymmetry: Sun-Earth distance effect[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2017,122(6):6727-6736.
APA	Dang, Tong,Wang, Wenbin,Burns, Alan,Dou, Xiankang,Wan, Weixing,&Lei, Jiuhou.(2017).Simulations of the ionospheric annual asymmetry: Sun-Earth distance effect.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,122(6),6727-6736.
MLA	Dang, Tong,et al."Simulations of the ionospheric annual asymmetry: Sun-Earth distance effect".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 122.6(2017):6727-6736.