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Advances in Earth Science  2010, Vol. 25 Issue (7): 723-729    DOI: 10.11867/j.issn.1001-8166.2010.07.0723
Articles     
A Study on Model of Geomagnetic Normal Field of China Region
Feng Yan1, An Zhenchang2, Sun Han3, Mao Fei4
1.College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210000, China;
2.Institute of Geology and Geophysics, Chinese Academy of sciences, Beijing 100029, China;
3.Remote Sensing Application and Experiment Station of National Satellite Meteorological Center/Guangxi Meteorological Disaster Mitigation Institute, Nanning 530022, China;
4.Chinese Academy of Meteorological Sciences, Beijing 100081, China
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Abstract  

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     
Received:  22 March 2010      Published:  10 July 2010
P318.1  
  P318.2  
Corresponding Authors:  Feng Yan     E-mail:  fengyan1980@gmail.com
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Cite this article: 

Feng Yan, An Zhenchang, Sun Han, Mao Fei. A Study on Model of Geomagnetic Normal Field of China Region. Advances in Earth Science, 2010, 25(7): 723-729.

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http://www.adearth.ac.cn/EN/10.11867/j.issn.1001-8166.2010.07.0723     OR     http://www.adearth.ac.cn/EN/Y2010/V25/I7/723

[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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