Annual and semi-annual variations of the observed foF2 in a high solar activity year
文献类型：期刊论文
| 作者 | Li, XY; Yu, T |
| 刊名 | TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES
 |
| 出版日期 | 2003-03-01 |
| 卷号 | 14期号:1页码:41-62 |
| 关键词 | foF2 annual variation foF2 semi-annual variation winter anomaly |
| 英文摘要 | By the Fourier series expanding method, the observed F2 layer critical frequencies (foF2) globally over 70 stations in a high solar activity year of 1958, are used to analyze the annual and semi-annual variations of foF2, and the world wide distribution features of their amplitude and phase in daytime and nighttime are studied in detail. The results for foF2 annual and semi-annual variation are summarized as follows. The midnight (2:00 LT) foF2 annual variations are noticeable in both hemispheres at mid-high latitudes, and their amplitudes are slightly larger in far pole regions than in near pole regions. Generally, at most stations, the midnight foF2 reach the maximum in summer, and no winter anomaly can be discerned. While in daytime (14:00 LT), there are pronounced annual variations with large amplitude in both hemispheres at mid-high latitudes. After carefully studying their phases, we find that these annual variations usually peak in winter, which indicate all the variations are classic winter anomaly. However, the winter anomaly is very weak in the equatorial zone and not even perceivable in South America. Moreover, the amplitude of daytime foF2 semi-annual variation is generally small in near pole regions and large in far poles region of both hemispheres. Compared with their annual component, the semi-annual variations in the tropical region are significant. Their phase distributions reveal that the semi-annual variation usually peaks in March and April. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Oceanography |
| 研究领域[WOS] | Geology ; Meteorology & Atmospheric Sciences ; Oceanography |
| 关键词[WOS] | IONOSPHERIC F2-LAYER ; F-LAYER ; THERMOSPHERE ; CIRCULATION ; MECHANISM |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000184459800004 |
| 公开日期 | 2015-12-08 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/8881]  |
| 专题 | 武汉物理与数学研究所_2011年以前论文发表（包括2011年） |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan Ionospher Observ, Wuhan 430071, Peoples R China 2.E China Normal Univ, Dept Phys, Shanghai 200062, Peoples R China 3.Wuhan Univ Technol, Dept Phys & Technol, Wuhan 430070, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, XY,Yu, T. Annual and semi-annual variations of the observed foF2 in a high solar activity year[J]. TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES,2003,14(1):41-62. |
| APA | Li, XY,&Yu, T.(2003).Annual and semi-annual variations of the observed foF2 in a high solar activity year.TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES,14(1),41-62. |
| MLA | Li, XY,et al."Annual and semi-annual variations of the observed foF2 in a high solar activity year".TERRESTRIAL ATMOSPHERIC AND OCEANIC SCIENCES 14.1(2003):41-62. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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