Effect of Non-Dipole Field on VGP Estimation
Effect of Non-Dipole Field on VGP Estimation
复制标题
非偶极子场对 VGP 估计的影响
DOI：
10.1002/cjg2.1130
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
Gengxiong Chen
中科院分区：
文献类型：
--
作者：
Wen;A. Du;Gengxiong Chen
The virtual geomagnetic pole (VGP) calculated under the assumption of a central dipole field is generally different from the real geomagnetic pole (RGP) since effect of the non-dipole field. In order to quantitatively examine effects of the non-dipole field on VGP determination, the VGP and RGP are calculated at 5° × 5° virtual sites by using the IGRF1900~2000 models. The results show significant departures of VGP from RGP in some major magnetic anomaly regions. The latitude departures of VGP from the RGP are as large as 25° in these anomaly regions, although they are acceptable in most sites on the earth's surface (less than 10°), mainly confined in the regions with a weak intensity of the non-dipole field, such as Pacific Ocean. The longitude departures of VGP from RGP are much more remarkable, scattering in a wide range from –180° to 180° in Eurasian continent. The angle distance between VGP and the RGP are generally within a range of 15°, except the Antarctica, South Atlantic Ocean and Eurasia regions.
DOI：
10.1098/rspa.1953.0064
发表时间：
1953-01-01
影响因子：
--
作者：
FISHER, R
通讯作者：
FISHER, R