Modulation of galactic cosmic rays during the unusual solar minimum between cycles 23 and 24
文献类型：期刊论文
| 作者 | Zhao, L. -L.; Qin, G. ; Zhang, M.; Heber, B.
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| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
 |
| 出版日期 | 2014 |
| 卷号 | 119期号:3页码:1493-1506 |
| ISSN号 | 2169-9380 |
| 通讯作者 | Qin, G (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China. |
| 英文摘要 | During the recent solar minimum between cycles 23 and 24 (solar minimum P-23/24), the intensity of galactic cosmic rays (GCR) measured at the Earth was the highest ever recorded since space age. It is the purpose of this paper to resolve the most plausible mechanism for this unusually high intensity. A GCR transport model in three-dimensional heliosphere based on a simulation of Markov stochastic process is used to find the relation of cosmic ray modulation to various transport parameters, including solar wind (SW) speed, distance of heliospheric boundary, magnitude of interplanetary magnetic field (IMF) at the Earth, tilt angle of heliospheric current sheet, and values of parallel and perpendicular diffusion coefficients. We calculate GCR proton energy spectra at the Earth for the last three solar minima P-21/22, P-22/23, and P-23/24, with the transport parameters obtained from observations. Besides weak IMF magnitude and slow SW speed, we find that a possible low magnetic turbulence, which increases the parallel diffusion and reduces the perpendicular diffusion in the polar direction, might be an additional possible mechanism for the high GCR intensity in the solar minimum P-23/24. |
| 学科主题 | 空间物理 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.nssc.ac.cn/handle/122/2760]  |
| 专题 | 国家空间科学中心_空间科学部 |
| 推荐引用方式 GB/T 7714 | Zhao, L. -L.,Qin, G.,Zhang, M.,et al. Modulation of galactic cosmic rays during the unusual solar minimum between cycles 23 and 24[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2014,119(3):1493-1506. |
| APA | Zhao, L. -L.,Qin, G.,Zhang, M.,&Heber, B..(2014).Modulation of galactic cosmic rays during the unusual solar minimum between cycles 23 and 24.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,119(3),1493-1506. |
| MLA | Zhao, L. -L.,et al."Modulation of galactic cosmic rays during the unusual solar minimum between cycles 23 and 24".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 119.3(2014):1493-1506. |
入库方式： OAI收割
来源：国家空间科学中心
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