中国东部地区地磁台站链Sqsub>(H)的季节变化
THE SEASONAL VARIATIONS OF Sq(H) AT THE GEOMAGNETIC OBSERVATORY-CHAIN IN EASTERN CHINA
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摘要: 本文利用中国东部沿120E经度线附近纬度均匀分布的十个地磁台站地磁静日变化水平分量的资料和主分量分析法,给出了详尽的Sq(H)季节变化随纬度分布的剖面及Sq电离层等效电流体系视焦点纬度.分析表明,Sq(H)中2的变化,主要由于电离层中等效电流体系对称轴偏离地磁轴引起的.Abstract: A detailed north-south section around the meridian at 120E of seasonal variation of Sq(H) for quiet days are presented using the data of ten geomagnetic observatories with nearly equal separation in latitudes between stations in eastern China,with the method of main component analysis. The apparent focus latitude of the equivalent current system in the ionosphere is presented. It is shown that the variation of 2 for Sq(H) is resulted from the deviation of the axis of symmetry of the equivalent current system from the geomagnetic axis.
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[2] Shlapp, D. M., 1976. Day——to——day variability of the latitudes of the Sq foci.J. Atmos. Terr Plays., 38, 5,573——577.
[3] Tatpley, J.D., 1973. Seasonal movement of the Sq current foci and related effects in the equatorial electroject. J.Atmos.Terr.Phys., 35. 1063——1071.
[4] 高玉芬、祁燕琴,1981,中国地区地磁垂直分量日变幅的空间分布及高空电流体系焦点位置的移动,地震学报,3, 143——151.
[5] Rajaram, M., 1983. Determination of the latitude of Sq focus and its relation to the electroject variation.J. Atoms, Terr. Phys., 45, 8/9, 573——578.
[6] 徐文耀,1987.用中低纬度地磁资料确定哭电流体系的焦点.空间科学学报,7,2,117——127.
[7] Olson, W. P., 1970. Contribution of nonionospheric currents to the quiet daily magnetic variations at the earth's surface. J. G. R., 75, 7244——7249.
[8] Matsushita, S., 1971. Interaction between the ionosphere and magnetosphere for Sq and L variations. Radio Sci., 6, 2, 279——294.
[9] Fukushima, N. and Kamide, Y., 1973. Contribution of magnetospheric field——alighed current to geomagnetic bays and Sq fields: a comment on partial ring——current model. Radio Sci., 8, 11, 1013——1017.
[10] Fukushima, N., Contribution to geomagnetic Sg——field and equatorial electroject from the day/night asymmerry of ionospheric current under dawn——dusk electric field in the magnetosphere. IAGA Vancouver Assembly, GA9. 1.[1] (iamphell, W. H .,1982. Annual and Semiannual changes of the quiet daily vanattons(Sq) in the Geumaghetic field at north American locations. J. G. R.,87, A2 785——796.
[2] Shlapp, D. M., 1976. Day——to——day variability of the latitudes of the Sq foci.J. Atmos. Terr Plays., 38, 5,573——577.
[3] Tatpley, J.D., 1973. Seasonal movement of the Sq current foci and related effects in the equatorial electroject. J.Atmos.Terr.Phys., 35. 1063——1071.
[4] 高玉芬、祁燕琴,1981,中国地区地磁垂直分量日变幅的空间分布及高空电流体系焦点位置的移动,地震学报,3, 143——151.
[5] Rajaram, M., 1983. Determination of the latitude of Sq focus and its relation to the electroject variation.J. Atoms, Terr. Phys., 45, 8/9, 573——578.
[6] 徐文耀,1987.用中低纬度地磁资料确定哭电流体系的焦点.空间科学学报,7,2,117——127.
[7] Olson, W. P., 1970. Contribution of nonionospheric currents to the quiet daily magnetic variations at the earth's surface. J. G. R., 75, 7244——7249.
[8] Matsushita, S., 1971. Interaction between the ionosphere and magnetosphere for Sq and L variations. Radio Sci., 6, 2, 279——294.
[9] Fukushima, N. and Kamide, Y., 1973. Contribution of magnetospheric field——alighed current to geomagnetic bays and Sq fields: a comment on partial ring——current model. Radio Sci., 8, 11, 1013——1017.
[10] Fukushima, N., Contribution to geomagnetic Sg——field and equatorial electroject from the day/night asymmerry of ionospheric current under dawn——dusk electric field in the magnetosphere. IAGA Vancouver Assembly, GA9. 1. -
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