| Demeter观测的电离层非震变化特征研究 |
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| 引用本文： | 刘晓灿,陈化然,姚丽,马新欣,袁亚红.Demeter观测的电离层非震变化特征研究[J].地震地磁观测与研究,2011,32(6):90-96. |
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| 作者姓名： | 刘晓灿 陈化然 姚丽 马新欣 袁亚红 |
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| 作者单位： | 中国北京100081 中国地震局地球物理研究所 |
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| 基金项目： | 中央级公益性科研院所基本科研业务费专项，公益性行业科研专项经费 |
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| 摘 要： | 利用法国电磁卫星Demeter装载的ICE(电场探针)及IAP(等离子体分析仪)探测数据,分析研究2006年不同季节、不同地方时顶部电离层电场及各等离子参量的全球空间分布特征,结果发现,电场x分量及H+离子浓度、O+离子浓度、He+离子浓度、等离子体温度具有显著的季节变化和地方时变化,而电场y分量及z分量全球分布的季节...
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| 关 键 词： | 地震 电离层变化特征 季节变化 地方时变化 |
Studies on characteristics of the ionospheric variations by observations of Demeter |
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| Liu Xiaocan,Chen Huaran,Yao Li,Ma Xinxin,Yuan Yahong.Studies on characteristics of the ionospheric variations by observations of Demeter[J].Seismological and Geomagnetic Observation and Research,2011,32(6):90-96. |
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| Authors: | Liu Xiaocan Chen Huaran Yao Li Ma Xinxin Yuan Yahong |
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| Institution: | (Institute of Geophysics, China Earthquake Administration, Beijing 100081, China) |
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| Abstract: | Kinds of variations in the ionosphere cover the possible abnormal induced by transient accidents （such as earthquake）, so itls necessary of the studies on characteristics of these variations for the exploring to seismic-ionosphere coupling phenomena. Here, we use observations of the instruments ICE （Instrument Champ Electrics） and IAP （Instrument Analyzer of Plasma） onboard Demeter electro-magnetic micro-satellite to analyze the spatial distributions of ionospheric electric field and ions parameters in 2006. As the result, we conclude that there are obvious seasonal variations and local time variations of the Ex vector and H＋ density. O＋ density. He＋ density and ions temperature, by contraries, seasonal and local-time effects of the electric-wave Ey and Ez vector are not apparent. Based on the definition that the long term global graphs of one season （include longer time period） compared to the transient earthquake event are called background fields of the ionosphere. We can conclude that the seasonal and local time variations of the electric-wave Ex vector and H＋ density. O＋ density. He＋ density, ions temperature must be subtracted while extracting the Seismic-ionospheric disturbances. |
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| Keywords: | seismic ionospheric background seasonal variation local time variation |
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