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极光电集流纬度变化特征初步分析 被引量:4

A preliminary analysis of the center latitude distribution of auroral electrojet
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摘要 为研究极光电集流地磁纬度分布特征,利用北半球SME台站提供的极光电集流指数,通过时序叠加的方法,分析98-07年极光电集流中心地磁纬度随季节和世界时的分布特征.通过对磁扰程度的分级,分析极光电集流地磁纬度随地磁扰动程度的变化特征.结果表明:1)由于SME台站覆盖范围更广,更多地记录到最大的极光电集流强度,有利于研究极光电集流的变化特征;2)西向极光电集流纬度分布存在与强度相反的季节性变化特征,在春秋出现最低值,冬季、夏季出现最高值;3)在SML<2000nT时,西向极光电集流地磁纬度随着极光电集流强度的增强,近似以线性关系向低纬迁移.随后伴随SML的进一步增强,西向极光极光电集流中心地磁纬度仍有向低纬迁移的趋势,但主要是在磁纬62°N-63°N之间波动. Using data of years 97-08 supported by SME stations, research distribution of center magnetic latitude of auroral electrojet following with different seasons and UT. It is generally understood that the center of the auroral electrojet tends to migrate equatorward with increasing magnetic activity. We ananlyse equatorward migration of auroral electrojet through the varitions of latitude with different magnetic disturb level. We found that: 1)The coverage of SME stations is more widely, it's useful for research feature of latitude distribution; 2)Distribution of west auroral electrojet is opposite with distribution of strength, it's lowest in spring and autumn, and it's highest in summer and winter; 3) In quited disturbed period, distribution of latitude is effected by strength of auroral electrojet; in disturbed period, distribution of latitude is little effectedhy strength of auroral electrojet.
出处 《地球物理学进展》 CSCD 北大核心 2013年第4期1655-1661,共7页 Progress in Geophysics
基金 国家重点基础研究计划项目(2011CB811404) 国家基金委青年基金(41104110)联合资助
关键词 极光电集流 纬度分布 低纬迁移 auroral electrojet, latitide distribution, migrate equatorward
作者简介 作者简介万秉东,男,1988年生,辽宁抚顺人,2010年6月毕业于中国传媒大学光电系,中科院地质与地球物理研究所硕士研究生在读,主要从事磁层亚暴研究工作.(E-mail:bd.one0126@163.com)
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参考文献24

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同被引文献31

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