海面与海底地磁日变化差异及其对海洋磁力测量的影响  

Difference of Geomagnetic Diurnal Variation Between Sea Surface and Ocean Bottom and Its Effects on Marine Magnetic Survey

作　　者：夏伟[1] 边刚[1] 金绍华[1] 任来平[2] 王美娜[1] 王琪[1] 

机构地区：[1]海军大连舰艇学院海洋测绘系,辽宁大连116018 [2]海军海洋测绘研究所,天津300061

出　　处：《海洋测绘》2015年第1期7-10,共4页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(41476087);地球空间环境与大地测量教育部重点实验室测绘基础研究基金(2011-1-5);海军大连舰艇学院科研发展基金(2013)

摘　　要：给出了海面与海底地磁日变化的计算公式,仿真分析了海面与海底地磁日变化差异,探讨了其对海洋磁力测量地磁日变改正的影响。结果表明:对于不同的地磁日变,海面与海底的地磁日变存在着较大的差异,且其随着地磁倾角的变化而变化,对磁测有一定的影响。为此,远海区海洋磁力测量中,建议联合采用地面日变站和海底日变站来减小或消除海面与海底地磁日变差异对磁测的影响,提高地磁日变改正的精度。The formula of the geomagnetic diurnal variation on sea surface and ocean bottom has been given out.The influences of the difference have been simulated and analyzed. Furthermore,the effects of the difference in marine magnetic surveys have been analyzed. The results show that survey products will be greatly affected by the difference and changed with the inclination of the survey area. In pelagic marine magnetic surveys,land stations and ocean bottom stations are advised to be adopted to decrease or eliminate the influence of the difference,and the precision of geomagnetic diurnal variation correction will be promoted.

关 键 词：海洋磁力测量 地磁日变 地磁日变站 海底日变站 

分 类 号：P318.63[天文地球—固体地球物理学]