吉芙蓉,李予国,段双敏

• 1:中国海洋大学海洋地球科学学院
• 2:青岛海洋科学与技术试点国家实验室海洋矿产资源评价与探测技术功能实验室

摘要(Abstract)：

海流运动因切割地磁场会生成微弱的电流，从而在海洋及其周围空间中激发感生电场。本文基于海流感应电磁场微分方程及其边界条件，推导了水平地层正弦洋流感应电场表达式。建立海水层、海底沉积层以及地壳绝缘层构成的地电模型，模拟计算正弦洋流感应电场及感应电流密度，分析海水层和海底沉积层中感应电流分布特征，并讨论了影响洋流感应电场的因素。模拟结果表明，对于宽海流，基于地磁场垂直分量的洋流感应水平，电场在垂直剖面上近似均匀分布。由于海底导电沉积层的存在会发生电流“泄漏”,电流穿过海底界面与海水中的电流形成闭合回路。洋流感应电流在海底沉积层中的流通能力取决于其纵向电导。

关键词(KeyWords)： 正弦洋流;感应电场;地磁场;纵向电导

Abstract:

Keywords:

基金项目(Foundation): 国家重点研究发展计划项目(2019YFC1408100)资助~~

作者(Author): 吉芙蓉,李予国,段双敏

DOI: 10.16441/j.cnki.hdxb.20210060

参考文献(References)：

• [1] 李庚伟.海洋感应电磁场理论研究[D].北京：中国地质大学(北京),2012.Li Geng-wei.The Theory Research on Ocean Induction Electromagnetic Field [D].Beijing:China University of Geosciences (Beijing),2012.
• [2] 单忠伟.海流测量技术综述[J].声学与电子工程，2011(1):1-5.Dan Zhong-wei.A review of current measurement techniques[J].Acoustics and Electronics Engineering,2011(1):1-5.
• [3] Chave A D,Filloux J H.Electromagnetic induction fields in the deep ocean off California:Oceanic and ionospheric sources[J].Geophysical Journal of the Royal Astronomical Society,1984,77(1):143-171.
• [4] 魏文博，邓明，温珍河，等.南黄海海底大地电磁测深试验研究[J].地球物理学报，2009,52(3):740-749.Wei Wen-bo,Deng Ming,Wen Zhen-he,et al.Experimental study of marine magnetotellurics in southern Huanghai[J].Chinese J Geophysics,2009,52(3):740-749.
• [5] 于彩霞，魏文博，景建恩，等.希尔伯特-黄变换在海底大地电磁测深数据处理中的应用[J].地球物理学进展，2010,25(3):1046-1056.Yu Cai-xia,Wei Wen-bo,Jing Jian-en,et al.Application of Hilbert-Huang transformation to marine magnetotelluric sounding data processing[J].Progress in Geophysics,2010,25(3):1046-1056.
• [6] Longuet-Higgins M S,Stern M E,Stommel H M.The electrical field induced by ocean currents and waves,with applications to the method of towed electrodes[J].Deep Sea Research,1956,3(2):156-160.
• [7] Sanford,Thomas B.Motionally induced electric and magnetic fields in the sea[J].Journal of Geophysical Research,1971,76(15):3476-3492.
• [8] Larsen J C.An introduction to electromagnetic induction in the ocean[J].Physics of the Earth & Planetary Interiors,1973,7(3):389-398.
• [9] 陈芸，吴晋声.海洋电磁学及其应用[J].海洋科学，1992(2):19-21.Chen Yun,Wu Jin-sheng.Marine electromagnetism and applications[J].Marine Sciences.1992(2):19-21.
• [10] 陈标，祝传刚，张铁军，等.典型海流磁场的数值模拟[J].青岛大学学报(自然科学版),2001,14(2):1-3.Chen Biao,Zhu Chuan-gang,Zhang Tie-jun,et al.Numerical simulation of typical ocean current magnetic field[J].Journal of Qingdao University,2001,14(2):1-3.
• [11] 张自力.海洋电磁场的理论及应用研究[D].北京：中国地质大学(北京),2009.Zhang Zi-li.Theory Research and Application of Ocean Electromagnetic Field[D].Beijing:China University of Geosciences,2009.
• [12] Bhatt K M.Motion Induced Noise in Marine Electromagnetic Data [D].Germany:Technischen Universitat Carolo-Wilhelmina,2011.
• [13] 张启升，邓明，刘宁，等.投弃式海流电场剖面仪研制[J].地球物理学报，2013,56(11):3699-3707.Zhang Qi-shen,Deng Ming,Liu Ning,et al.Development of the expendable current profiler[J].Journal of Geophysical Research,2013,56(11):3699-3707.
• [14] 林春生，任德奎.海流感应电磁场的分析与计算[J].海军工程大学学报，2003(4):21-24+43.Lin Chun-sheng,Ren De-kui.Calculation of electromagnetic field induced by ocean current[J].Journal of Naval University of Engineering.2003(4):21-24+43.
• [15] Zoltan B Szuts.The Interpretation of Motionally Induced Electric Fields in Oceans of Complex Geometry[D].Washington,USA:University of Washington,2008.
• [16] Szuts Z B.Relationship between ocean velocity and motionally induced electrical signals:1.In the presence of horizontal velocity gradients[J].Journal of Geophysical Research:Oceans,2010,15(6):267-271.
• [17] Hall M.Direct estimates and mechanisms of ocean heat transport[J].Deep Sea Research Part A Oceanographic Research Papers,1982,29(3):339-359.
• [18] 朱心宇，李予国.有限水深海流感应电磁场数值模拟[J].中国海洋大学学报(自然科学版),2020,50(8):109-114.Zhu Xin-Yu,LI Yu-Guo.Numerical simulation of electromagnetic field induced by ocean current in finite water depth[J].Periodical of Ocean University of China,2020,50(8):109-114.
• [19] 索切尔尼科夫 B B.海洋中天然电磁场的理论基础[M].陈芸译.北京：海洋出版社，1987.Sochernikov B B.Theoretical Basis of Natural Electromagnetic Fields in the Ocean[M].Chen Yun Translation.Beijing:China Ocean Press,1987.

文章评论(Comment)：