The correlation between solar and geomagnetic activity - Part 1: Two-term decomposition of geomagnetic activity
文献类型：期刊论文
| 作者 | Du, Z. L. |
| 刊名 | ANNALES GEOPHYSICAE
 |
| 出版日期 | 2011 |
| 卷号 | 29期号:8页码:1331-1340 |
| 关键词 | Magnetospheric physics Solar wind-magnetosphere interactions |
| 英文摘要 | By analyzing the logarithmic relationship between geomagnetic activity as represented by the annual aa index and solar magnetic field activity as represented by the annual sunspot number (R-z) during the period 1844-2010, aa is shown to lie in between two lines defined solely by R-z. Two ways can be used to decompose the aa index into two components. One is decomposing aa into the sum of the baseline (aa(b)) and the remainder (aa(u)) with a null correlation. Another is dividing the top-line (aa(t)) into the sum of aa and the remainder (aa(d)) with a null correlation. The first decomposition is similar to the traditional one. The second decomposition implies a nonlinear relationship of aa with R-z (aa(t)) and a decay process (aa(d)). Therefore, aa(t) = aa + aa(d) = aa(b) + aa(u) + aa(d): (i) aa(t) is related to the solar energy potential of generating geomagnetic activity (associated with R-z); (ii) aa(b) is related to transient phenomena; (iii) aa(u) is related to recurrent phenomena; and (iv) aa(d) is related to the energy loss in the transmission from solar surface to the magnetosphere and ionosphere that failed to generate geomagnetic activity. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000294455800001 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/8065]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China |
| 推荐引用方式 GB/T 7714 | Du, Z. L.. The correlation between solar and geomagnetic activity - Part 1: Two-term decomposition of geomagnetic activity[J]. ANNALES GEOPHYSICAE,2011,29(8):1331-1340. |
| APA | Du, Z. L..(2011).The correlation between solar and geomagnetic activity - Part 1: Two-term decomposition of geomagnetic activity.ANNALES GEOPHYSICAE,29(8),1331-1340. |
| MLA | Du, Z. L.."The correlation between solar and geomagnetic activity - Part 1: Two-term decomposition of geomagnetic activity".ANNALES GEOPHYSICAE 29.8(2011):1331-1340. |
入库方式： OAI收割
来源：国家天文台
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