Seasonally Discrepant Long-Term Variations of the F-2-Layer Due To Geomagnetic Activity and Modulation to Linear Trend
文献类型：期刊论文
| 作者 | Chen, Yiding1,2,3,4; Liu, Libo1,2,3,5; Le, Huijun1,2,3,5; Zhang, Hui1,2,3,5; Zhang, Ruilong1,2,3,5 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
 |
| 出版日期 | 2022-11-01 |
| 卷号 | 127期号:11页码:11 |
| 关键词 | ionospheric F2 layer long-term trend geomagnetic activity |
| ISSN号 | 2169-9380 |
| DOI | 10.1029/2022JA030951 |
| 英文摘要 | Ionospheric long-term variation has attracted wide attention since the upper atmosphere cooling due to increasing greenhouse gas was suggested. Observations of the lower ionosphere have indicated that cooling effect, whereas the F-2 layer long-term variation still remains controversial as multiple driving sources may cause it. It is crucial for investigating the F-2 layer long-term variation to distinguish contributions of different sources. f(o)F(2) records covering both long-term increasing and decreasing phases of geomagnetic activity were selected for this study. f(o)F(2) long-term component related to those increasing and decreasing phases is separable from the linear trend due to increasing greenhouse gas; it was identified and investigated. Geomagnetic activity induced long-term component was found to be seasonally discrepant. With long-term increasing geomagnetic activity, f(o)F(2) increases in winter while decreases in summer at middle and low latitudes; it decreases at higher latitudes while turns to increases with decreasing latitudes in equinox. In addition to the geomagnetic activity induced component, the linear component is dominated by long-term decreasing trend, which is in line with the increasing greenhouse gas. Long-term evolution of frequent weak geomagnetic activity was suggested to be primarily responsible for the seasonally discrepant long-term variation of f(o)F(2) related to geomagnetic activity; it may change thermospheric composition by modulating average circulation. Moreover, geomagnetic activity has a decreasing trend as a whole. That may lead to misleading correlation between f(o)F(2) long-term variation and geomagnetic activity if linear trend is dominant, and cause significant deviation when estimating greenhouse gas related decreasing trend using linear regression. |
| WOS关键词 | UPPER-ATMOSPHERE ; MAGNETIC-FIELD ; IONOSPHERE ; THERMOSPHERE ; FOF2 ; LAYER ; MESOSPHERE ; NIGHTTIME ; F2-LAYER ; DAYTIME |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000888531600001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/107662]  |
| 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 | Chen, Yiding |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing Natl Observ Space Environm, Beijing, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Heilongjiang Mohe Observ Geophys, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Yiding,Liu, Libo,Le, Huijun,et al. Seasonally Discrepant Long-Term Variations of the F-2-Layer Due To Geomagnetic Activity and Modulation to Linear Trend[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2022,127(11):11. |
| APA | Chen, Yiding,Liu, Libo,Le, Huijun,Zhang, Hui,&Zhang, Ruilong.(2022).Seasonally Discrepant Long-Term Variations of the F-2-Layer Due To Geomagnetic Activity and Modulation to Linear Trend.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,127(11),11. |
| MLA | Chen, Yiding,et al."Seasonally Discrepant Long-Term Variations of the F-2-Layer Due To Geomagnetic Activity and Modulation to Linear Trend".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 127.11(2022):11. |
入库方式： OAI收割
来源：地质与地球物理研究所
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