| 极光沉降粒子能量与AE、Dst指数的相关分析 |
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| 引用本文： | 刘晓灿, 陈耿雄, 徐文耀, 杜爱民, 吴迎燕, 陈博, 王源, 赵旭东. 极光沉降粒子能量与AE、Dst指数的相关分析[J]. 地球物理学报, 2008, 51(4): 968-975, |
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| 作者姓名： | 刘晓灿 陈耿雄 徐文耀 杜爱民 吴迎燕 陈博 王源 赵旭东 |
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| 作者单位： | 1 中国科学院地质与地球物理研究所,北京 100029; 2 中国科学院研究生院,北京 100039 |
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| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金 |
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| 摘 要： | 对NOAA的POES系列极轨卫星观测得到的1978年以来近30年的极光沉降粒子半球能量的估算值EPI(Estimated Power Input)数据进行了分析，结果表明，极光沉降粒子有显著的春秋分峰值的年变化特征，并且有冬季半球沉降能量较大的南北半球不对称性.对EPI的时均值Pa与地磁指数AE、Dst的相关分析得到，Pa与AE的相关系数为0.76，Pa与Dst的相关系数为-0.55.把南北半球的时均值SPa,NPa数据分别与AE，Dst指数做相关，发现SPa与AE的相关性稍高于NPa的，SPa和NPa与Dst的相关性近似.当时延τ=0时，AE与Pa的相关最好，表明全球极光沉降粒子和极光电集流的变化同步；当Dst滞后于Pa，时延τ=1~2 h，Pa与Dst的相关最好，并且时延τ为6～8 h，Pa与Dst的相关都好于无时延的水平.
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| 关 键 词： | 极光 沉降粒子 亚暴 EPI 地磁指数 相关分析 |
| 收稿时间： | 2007-07-27 |
| 修稿时间： | 2008-02-21 |
Relationships of the auroral precipitating particle power with AE and Dst indices |
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| LIU Xiao-Can, CHEN Geng-Xiong, XU Wen-Yao, DU Ai-Min, WU Ying-Yan, CHEN Bo, WANG Yuan, ZHAO Xu-Dong. Relationships of the auroral precipitating particle power with AE and Dst indices[J]. Chinese Journal of Geophysics (in Chinese), 2008, 51(4): 968-975, |
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| Authors: | LIU Xiao-Can CHEN Geng-Xiong XU Wen-Yao DU Ai-Min WU Ying-Yan CHEN Bo WANG Yuan ZHAO Xu-Dong |
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| Affiliation: | 1 Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China; 2 Graduate School of the Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | The data of the estimated power input (EPI) of auroral particles from NOAA/POES (Polar orbiting environmental satellite) for some 30 years have been analyzed. The annual variation of EPI shows equinox peaks, and an asymmetric activity with a higher peak in the winter-hemisphere than in the summer-hemisphere. The variation tendencies of the EPI generally coincide with aa, AE and Dst indices. Studies on the correlations of the hourly average of EPI, Pa, with AE and Dst indices show a correlation coefficient r=0.76 of Pa and AE and r=-0.55 of Pa and Dst. The EPIs for north and south polar regions, NPa and SPa, show a north-south asymmetry with a higher correlation of SPa and AE (or Dst). Time delays of EPI with respect to magnetic indices are examined, the maximum correlation coefficient of Pa with AE (r=0.78) occurs when the time delay τ=0, suggesting a synchronism of auroral electrojet and auroral precipitating particles, while τ=1~2 hours, the correlation coefficient of Pa with Dst is maximum (r=0.57), suggesting that the activity of auroral particle precipitation may influence the ring current to some extent. |
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| Keywords: | Auroral Precipitating particles Substorm EPI Magnetic indices Correlation |
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