Analysis of variation in geomagnetic field of Chinese mainland based on comprehensive model CM4

	Analysis of variation in geomagnetic field of Chinese mainland based on comprehensive model CM4
	Feng Yan 2; An Zhen-Chang 3; Sun Han 4; Mao Fei 1
刊名	ACTA PHYSICA SINICA
	2010-12-01
卷号	59 期号:12 页码:8941-8953
关键词	Comprehensive Model Internal Field External Field Crustal Magnetic Anomaly Field
ISSN号	1000-3290
文献子类	Article
英文摘要	The fourth generation of comprehensive model of geomagnetic field CM4 is a numerical model in which earth's magnetic field can completely be divided into internal and external parts. In this paper we have calculated and plotted the grid values of internal and external fields of Chinese mainland in every 10 a from 1960 to 2000 by combining CM4 with Taylor polynomial model based on all survey data during 1960-2000; and made more efforts to analyze the whole distribution of crustal anomaly field. Results show that internal field value of northern component X decreased with time. The amplitude was about 750 nT in the period from 1960 to 2000, the trend of external field variation increased in 1960, then gradually decreased about 32 nT until 2000. The internal field value of eastern component Y decreased first, then continuously increased, and its intensities decreased about 40 nT from 1960 to 2000. The trend of external field variation was increased, decreased and increased as time went on, and the external field increased up to about 3.8 nT since 1960. The internal field value of vertical component Z was similar to that of Y, its intensities totally increased about 600 nT. The trend of external field variation decreased and then increased with time, amplitude of which was about 4.6 nT. As for anomalous field, the distributions of components X and Z, total intensity F, and horizontal component H were all negative, the intensities of X and H decreased with longitude while those of Z and F increased. The distributions of Y and declination D were very similar and both of them had positive values in west-central region of China. Their intensities decreased with longitude. The distribution of inclination I was mainly negative, and its intensity increased with longitude.
WOS关键词	EARTH MAGNETIC-FIELD ; ANOMALY MAP ; SATELLITE ; VECTOR ; CORE
WOS研究方向	Physics
语种	英语
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000286689500090
资助机构	National High Technology Research and Development Program of China(2007AA12Z328) ; National High Technology Research and Development Program of China(2007AA12Z328) ; National High Technology Research and Development Program of China(2007AA12Z328) ; National High Technology Research and Development Program of China(2007AA12Z328) ; National High Technology Research and Development Program of China(2007AA12Z328) ; National High Technology Research and Development Program of China(2007AA12Z328) ; National High Technology Research and Development Program of China(2007AA12Z328) ; National High Technology Research and Development Program of China(2007AA12Z328)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73300]
专题	中国科学院地质与地球物理研究所
通讯作者	Mao Fei
作者单位	1.Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China 2.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 4.Guangxi Meteorol Disaster Mitigat Inst, Natl Satellite Meteorol Ctr, Remote Sensing Applicat & Expt Stn, Nanning 530022, Peoples R China
推荐引用方式 GB/T 7714	Feng Yan,An Zhen-Chang,Sun Han,et al. Analysis of variation in geomagnetic field of Chinese mainland based on comprehensive model CM4[J]. ACTA PHYSICA SINICA,2010,59(12):8941-8953.
APA	Feng Yan,An Zhen-Chang,Sun Han,&Mao Fei.(2010).Analysis of variation in geomagnetic field of Chinese mainland based on comprehensive model CM4.ACTA PHYSICA SINICA,59(12),8941-8953.
MLA	Feng Yan,et al."Analysis of variation in geomagnetic field of Chinese mainland based on comprehensive model CM4".ACTA PHYSICA SINICA 59.12(2010):8941-8953.