The correlation between solar and geomagnetic activity - Part 3: An integral response model
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:6页码:1005-1018 |
| 关键词 | Solar physics, astrophysics, and astronomy General or miscellaneous |
| 英文摘要 | An integral response model is proposed to describe the relationship between geomagnetic activity (aa index) and solar activity (represented by sunspot number R-z): The aa at a given time t is the integral of R-z at past times (t' <= t) multiplied by an exponential decay factor of the time differences (e(-(t-t')/tau)), where tau is the decay time scale (similar to 40 months). The correlation coefficient of aa with the reconstructed series based on this model (r(f) = 0.85) is much higher than that of aa with R-z (r(0) = 0.61). If this model is applied to each solar cycle, the correlation coefficient will be higher (r(f) = 0.95). This model can naturally explain some phenomena related to aa and R-z, such as (i) the significant increase in the aa index (and its baseline) over the twentieth century; (ii) the longer lag times of aa to R-z at solar cycle maxima than at minima; and (iii) the variations in the correlations related to solar and Hale cycles. These results demonstrate that aa depends not only on the present R-z but also on past values. The profile of aa can be better predicted from R-z by this model than by point-point correspondence. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000291945800005 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/7832]  |
| 专题 | 国家天文台_太阳物理研究部 |
| 作者单位 | Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Activ, 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 3: An integral response model[J]. ANNALES GEOPHYSICAE,2011,29(6):1005-1018. |
| APA | Du, Z. L..(2011).The correlation between solar and geomagnetic activity - Part 3: An integral response model.ANNALES GEOPHYSICAE,29(6),1005-1018. |
| MLA | Du, Z. L.."The correlation between solar and geomagnetic activity - Part 3: An integral response model".ANNALES GEOPHYSICAE 29.6(2011):1005-1018. |
入库方式： OAI收割
来源：国家天文台
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