收稿日期: 2010-03-22
修回日期: 2010-05-26
网络出版日期: 2010-07-10
基金资助
国家高技术研究发展计划课题研究专项“室内水下地磁定位导航技术研究”(编号:2007AA12Z328)资助
A Study on Model of Geomagnetic Normal Field of China Region
Received date: 2010-03-22
Revised date: 2010-05-26
Online published: 2010-07-10
冯彦,安振昌,孙涵,毛飞 . 中国地区地磁正常场模型研究[J]. 地球科学进展, 2010 , 25(7) : 723 -729 . DOI: 10.11867/j.issn.1001-8166.2010.07.0723
Based on three components survey data of China in 2000, two kinds of normal field, main field model of CM4 and Taylor polynomial model, were chosen to calculate and draw the distribution plots of normal field. Due to the high similarity between the two kinds of normal field and in order to make more precise comparative analysis of them, two kinds of anomaly values were correspondingly calculated by using the two models. Moreover, the Surface Spline model was selected to draw anomaly plots of each component. Results showed that the distribution of the two kinds of the normal field is very similar. The normal field made by CM4 has a good coincidence with the distribution outside the boundary, which is suit for the study of the geomagnetic anomaly on large scale. Nevertheless, the negative values dominate in most regions of China; On the contrary, the normal field made by Taylor model is suit for the study of the regional geomagnetic anomaly, the distribution of positive and negative values is comparatively uniform and reasonable in the mainland.
Key words: CM4; Normal field; Surface Spline
[1] IAGA, Commission 2, Working Group 4. International Geomagnetic Reference Field 1965.0[J].Journal of Geophysical Research,1969, 74: 4 407-4 408.
[2] Maus S, Macmillan S, Chernova T, et al. The 10th Generation International Geomagnetic Reference Field[J].Physics of the Earth and Planetary Interiors,2005, 151: 320-322.
[3] Kang Guofa, Wu Xiaoping, Hu Jiafu. Global changes of the geomagnetic field during 1600-2000 AD[J].Advances in Earth Science,2002,17(3):339-343.[康国发,吴小平,胡家富.1600-2000年地球主磁场的全球变化[J].地球科学进展,2002,17(3):339-343.]
[4] Boles L C, Lohmann K J. True navigation and magnetic maps in spiny lobsters[J].Nature,2004, 421(2): 60-63.
[5] Maus S. An ellipsoidal harmonic representation of Earth′s lithospheric magnetic field to degree and order 720[J].Geochemistry, Geophysics, Geosystems,2010. doi: 10.1029/2010GC003034,in.press.
[6] Olsen N, Mandea M, Sabaka T J, et al. CHAOS-2—A geomagnetic field model derived from one decade of continuous satellite Data[J].Geophysical Journal International,2009, 179: 1 477-1 487.
[7] Sabaka T J, Baldwin R T. Modeling the Sq magnetic field from POGO and Magsat satellite and contemporaneous hourly observatory data: Phase I[R].NASA/ GSFC Cont ractNAS5. 31 760,1993.
[8] Langel R A, Sabaka T J, Baldwin R T, et al. The near Earth magnetic field from magnetospheric and quiet-day ionospheric sources and how it is modeled[J].Physics of the Earth and Planetary Interiors,1996, 98(324):235-267.
[9] Sabaka T J, Olsen N, Langel R A. A comprehensive model of the quiet-time, near-Earth magnetic field: Phase 3[J].Geophysical Journal International,2002, 151: 32-68.
[10] Sabaka T J, Olsen N, Purucker M E. Extending comprehensive models of the Earth′s magnetic field with ørsted and CHAMP data[J].Geophysical Journal International,2004,159: 521-547.
[11] Gao Jintian, An Zhenchang, Gu Zuowen, et al. Selection of the geomagnetic normal field and calculation of the geomagnetic anomalous field[J].Chinese Journal of Geophysics,2005, 48(1):56-62.[高金田,安振昌,顾左文,等. 地磁正常场的选取和地磁异常场的计算[J]. 地球物理学报, 2005,48(1):56-62.]
[12] Langel R A, Estes R H, Mead G D. Some new methods in geomagnetic field modeling applied to the 1960-1980 epoch[J].Journal of Geomagnetism and Geoelectricity,1982, 34: 327-349.
[13] Ravat D N, Langel R A, Purucker M E, et al. Global vector and scalar magsat magnetic anomaly maps[J]. Journal of Geophysical Research,1995, 100(20): 111-135.
[14] Xu Wenyao, Xia Guohui, An Zhenchang, et al. Magnetic survey and ChinaGRF[J]. Earth Planets Space, 2000, 55: 215-217.
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