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东亚地磁非偶极场的变化特征研究 被引量:2

Change Charactristics of Geomagnetic the Non-dipole Field in East Asia
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摘要 本文用国际地磁参考场研究东亚地磁非偶极场的时空分布和磁场强度的变化规律,并对其场源特性进行探讨.结果表明,1945年以来,东亚地磁非偶极场存在缓慢的北移和西向漂移.磁异常中心附近的磁场强度呈波动性增加.其场源可分为漂移场和稳定场两部分. The geomagnetie non-dipole field in East Asia were caculated usingIGRF, and were analysed the variationcharacteristi c of its. Results show that the centrelocation of non-dipole field we re slow movement to nothward and westward at 45 year in-tervals fron 1945~1990.The non-dipole field intensity of z element there were about 15ye ar intervals for inereased or decreased.
出处 《云南大学学报(自然科学版)》 CAS CSCD 1995年第4期358-362,368,共6页 Journal of Yunnan University(Natural Sciences Edition)
关键词 IGRF 地磁非偶极场 长期变化 东亚地区 地磁场 IGRF, the non-dipole magnetic field,secular variation,ecce ntricdipole magnetic field
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