Beyond the Minisolar Maximum of Solar Cycle 24: Declining Solar Magnetic Fields and the Response of the Terrestrial Magnetosphere
文献类型：期刊论文
| 作者 | Ingale, M.1; Janardhan, P.1; Bisoi, S. K.2 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
 |
| 出版日期 | 2019-08-01 |
| 卷号 | 124期号:8页码:6363-6383 |
| 关键词 | solar-terrestrial relations photospheric magnetic fields interplanetary scintillations bow shock magnetopause forecasting |
| ISSN号 | 2169-9380 |
| DOI | 10.1029/2019JA026616 |
| 英文摘要 | The present study examines the response of the terrestrial magnetosphere to the long-term steady declining trends observed in solar magnetic fields and solar wind microturbulence levels since mid-1990s that has been continuing beyond the minisolar maximum of cycle 24. A detailed analysis of the response of the terrestrial magnetosphere has been carried out by studying the extent and shape of the Earth's magnetopause and bow shock over the past four solar cycles. We estimate subsolar stand-off distance of the magnetopause and bow shock and the shape of the magnetopause, using numerical as well as empirical models. The computed magnetopause and bow shock stand-off distances have been found to be increasing steadily since around mid-1990s, consistent with the steady declining trend seen in solar magnetic fields and solar wind microturbulence levels. Similarly, we find an expansion in the shape of the magnetopause since 1996. The implications of the increasing trend seen in the magnetopause and bow shock stand-off distances are discussed and a forecast of the shape of the magnetopause in 2020, the minimum of cycle 24, has been made. Importantly, we also find two instances between 1968 and 1991 when the magnetopause stand-off distance dropped to values close to 6.6 Earth radii, the geostationary orbit, for duration ranging from 9-11 hr and one event in 2005, post 1995 when the decline in photospheric fields began. Though there have been no such events since 2005, it represents a clear and present danger to our satellite systems. |
| WOS关键词 | WIND DISAPPEARANCE EVENT ; EARTHS BOW SHOCK ; STANDOFF DISTANCE ; MACH NUMBER ; MAGNETOPAUSE ; SHAPE ; MINIMUM ; SIZE ; LOCATION ; MHD |
| 资助项目 | ISEE International Collaborative Research Program ; PIFI program of the Chinese Academy of Sciences[2015PM066] ; NSFC[117550110422] ; NSFC[11433006] ; NSFC[11790301] ; NSFC[11790305] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000490956600001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | ISEE International Collaborative Research Program ; ISEE International Collaborative Research Program ; PIFI program of the Chinese Academy of Sciences ; PIFI program of the Chinese Academy of Sciences ; NSFC ; NSFC ; ISEE International Collaborative Research Program ; ISEE International Collaborative Research Program ; PIFI program of the Chinese Academy of Sciences ; PIFI program of the Chinese Academy of Sciences ; NSFC ; NSFC ; ISEE International Collaborative Research Program ; ISEE International Collaborative Research Program ; PIFI program of the Chinese Academy of Sciences ; PIFI program of the Chinese Academy of Sciences ; NSFC ; NSFC ; ISEE International Collaborative Research Program ; ISEE International Collaborative Research Program ; PIFI program of the Chinese Academy of Sciences ; PIFI program of the Chinese Academy of Sciences ; NSFC ; NSFC |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/28039]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Ingale, M. |
| 作者单位 | 1.Phys Res Lab, Astron & Astrophys Div, Navarangpura, India 2.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ingale, M.,Janardhan, P.,Bisoi, S. K.. Beyond the Minisolar Maximum of Solar Cycle 24: Declining Solar Magnetic Fields and the Response of the Terrestrial Magnetosphere[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2019,124(8):6363-6383. |
| APA | Ingale, M.,Janardhan, P.,&Bisoi, S. K..(2019).Beyond the Minisolar Maximum of Solar Cycle 24: Declining Solar Magnetic Fields and the Response of the Terrestrial Magnetosphere.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,124(8),6363-6383. |
| MLA | Ingale, M.,et al."Beyond the Minisolar Maximum of Solar Cycle 24: Declining Solar Magnetic Fields and the Response of the Terrestrial Magnetosphere".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 124.8(2019):6363-6383. |
入库方式： OAI收割
来源：国家天文台
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