Calculation and analysis of geomagnetic field horizontal gradients in China

doi:10.3969/j.issn.0001-5733.2010.12.013

	Calculation and analysis of geomagnetic field horizontal gradients in China
	Feng Yan 1; Pan Jian-Jun 1; An Zhen-Chang 2; Sun Han 3; Mao Fei 4
刊名	CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
	2010-12-01
卷号	53 期号:12 页码:2899-2906
关键词	Taylor polynomial Surface Spline Geomagnetic field model Horizontal gradient
ISSN号	0001-5733
DOI	10.3969/j.issn.0001-5733.2010.12.013
文献子类	Article
英文摘要	Based on survey data of 156 observatories and repeat stations of China,6 observatories and 36 IGRF points outside the China in 2000,the geomagnetic field models of total intensity(F), declination(D) and inclination(I) are established by Taylor polynomial model and Surface Spline model, meanwhile, the differential for phi (latitude) and lambda (longitude) of models is carried out to calculate the geomagnetic horizontal gradients, respectively. Then the gradients distribution charts of corresponding components in south-north and east-west direction are drawn, from which a comparison between horizontal gradient charts and IGRF10 for 2000 is made, consistency and difference among these three kinds of horizontal gradient are implemented, too. Finally, the spacial distribution of horizontal gradient is analyzed numerically. Results showed that horizontal gradients of F and I varied mainly with latitude, which of F ranged from 7.0 nT/min to 6.0 nT/min while latitude increased, and got the biggest values in the central region (25 degrees similar to 35 degrees N,90 degrees similar to 120 degrees E) of China,I's gradients varied range from 2`/min to 1`/min while latitude increased, D's gradients varied with both latitude and longitude, which ranged from 0.4`/min to -0.3`/min in north-south direction while longitude increased and -0.1`/min to -0.4`/min in east-west direction while latitude increased respectively.
WOS关键词	EARTHS MAGNETIC-FIELD ; HARMONIC-ANALYSIS ; SATELLITE DATA ; MODEL ; GENERATION ; CHAMP
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000285862200013
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/72525]
专题	中国科学院地质与地球物理研究所
通讯作者	Feng Yan
作者单位	1.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210000, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Guangxi Meteorol Disaster Mitigat Inst, Natl Satellite Meteorol Ctr, Remote Sensing Applicat & Expt Stn, Nanning 530022, Peoples R China 4.Chinese Acad Meteorol Sci, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Feng Yan,Pan Jian-Jun,An Zhen-Chang,et al. Calculation and analysis of geomagnetic field horizontal gradients in China[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2010,53(12):2899-2906.
APA	Feng Yan,Pan Jian-Jun,An Zhen-Chang,Sun Han,&Mao Fei.(2010).Calculation and analysis of geomagnetic field horizontal gradients in China.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,53(12),2899-2906.
MLA	Feng Yan,et al."Calculation and analysis of geomagnetic field horizontal gradients in China".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 53.12(2010):2899-2906.