Longitudinal modulation of electron and mass densities at middle and auroral latitudes: Effect of geomagnetic field strength
文献类型：期刊论文
| 作者 | Wang, Hui1; Zhang, Jing1; Luehr, Hermann2; Wei, Yong3 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
 |
| 出版日期 | 2017-06-01 |
| 卷号 | 122期号:6页码:6595-6610 |
| 关键词 | magnetic field electron density air mass density longitudinal difference GITM |
| ISSN号 | 2169-9380 |
| DOI | 10.1002/2016JA023829 |
| 文献子类 | Article |
| 英文摘要 | In this study, the effect of a reduction in magnetic field strength on the longitudinal modulation of electron density (Delta Ne) and mass density (Delta rho) is investigated. We study conditions during the September equinox and June and December solstices at middle and auroral latitudes in both Northern and Southern Hemispheres. The Global Ionosphere-Thermosphere Model was employed for the theoretical study. Simulations were performed with a realistic International Geomagnetic Reference Field (IGRF) model and an IGRF model reduced in strength by 50%. The reduction in field strength increased the longitudinal variations in Delta Ne by 2-34% in the nighttime sector but reduced the variation by 7-20% in the daytime sector at midlatitudes in both hemispheres. Conversely, at auroral latitudes Ne was reduced by 2-32% at all local times. The changes during equinoxes are larger than those for the solstices. The differences with local time in the response of Ne to a reduction in magnetic field strength were mainly due to changes in the oxygen/molecular nitrogen (O/N-2) ratio in the Northern Hemisphere, whereas the differences were due to the combined effects of vertical winds and changes in the O/N-2 ratio in the Southern Hemisphere. Both vertical winds and horizontal (E) over bar x (B) over bar convection eliminated Ne at high latitudes. Delta rho got enhanced at both middle and auroral latitudes, which was related to the enhanced Joule heating effect when the magnetic field was reduced. |
| WOS关键词 | ZONAL DIFFERENCES ; MAGNETIC-FIELD ; POLAR-CAP ; IONOSPHERE ; MIDLATITUDES ; CHAMP ; DECLINATION ; ATMOSPHERE ; MODEL ; IONS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000405534800048 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | National Nature Science Foundation of China(41674153 ; Hubei province ; 41521063 ; 41431073) ; National Nature Science Foundation of China(41674153 ; Hubei province ; 41521063 ; 41431073) ; National Nature Science Foundation of China(41674153 ; Hubei province ; 41521063 ; 41431073) ; National Nature Science Foundation of China(41674153 ; Hubei province ; 41521063 ; 41431073) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/42974]  |
| 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 | Wang, Hui |
| 作者单位 | 1.Wuhan Univ, Sch Elect Informat, Dept Space Phys, Wuhan, Hubei, Peoples R China 2.GFZ German Res Ctr Geosci, Potsdam, Germany 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Hui,Zhang, Jing,Luehr, Hermann,et al. Longitudinal modulation of electron and mass densities at middle and auroral latitudes: Effect of geomagnetic field strength[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2017,122(6):6595-6610. |
| APA | Wang, Hui,Zhang, Jing,Luehr, Hermann,&Wei, Yong.(2017).Longitudinal modulation of electron and mass densities at middle and auroral latitudes: Effect of geomagnetic field strength.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,122(6),6595-6610. |
| MLA | Wang, Hui,et al."Longitudinal modulation of electron and mass densities at middle and auroral latitudes: Effect of geomagnetic field strength".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 122.6(2017):6595-6610. |
入库方式： OAI收割
来源：地质与地球物理研究所
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