[1]邢琮琮,徐 行,陆镜辉,等.南海北部陆海台站地磁观测与磁场模型计算的对比分析[J].华南地震,2019,39(04):60-68.[doi:10.13512/j.hndz.2019.04.009]
　XING Congcong,XU Xing,LU Jinghui,et al.Comparative Analysis of Geomagnetic Observation and Magnetic Field Model Calculation for Land and Marine Stations in the Northern South China Sea[J].SOUTH CHINA JOURNAL OF SEISMOLOGY,2019,39(04):60-68.[doi:10.13512/j.hndz.2019.04.009]
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南海北部陆海台站地磁观测与磁场模型计算的对比分析()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
39
期数:
2019年04期
页码:
60-68
栏目:
华南地震
出版日期:
2019-12-31

文章信息/Info

Title:
Comparative Analysis of Geomagnetic Observation and Magnetic Field Model Calculation for Land and Marine Stations in the Northern South China Sea
文章编号:
1001-8662（2019）0４-0060-09
作者:
邢琮琮1; 徐 行1; 陆镜辉2; 陈幸莲3
（1． 广州海洋地质调查局，广州 510760；2． 广东省地震局，广州 510700；3． 广东省地震局阳江地震台，广东 阳江 529500）
Author(s):
XING Congcong1; XU Xing1; LU Jinghui2; CHEN Xingliang3
（1. Guangzhou Marine Geological Survey，Guangzhou 510760，China；2. Guangdong Earthquake Agency，Guangzhou 510700，China；3. Yangjiang Earthquake Agency，Yangjiang 529500，China）
关键词:
南海北部; CM4模型; IGRF模型; 海底地磁观测; 变化磁场
Keywords:
The Northern South China Sea; CM4 model; IGRF model; Submarine geomagnetic observation; Variation magnetic field
分类号:
P318.6
DOI:
10.13512/j.hndz.2019.04.009
文献标志码:
A
摘要:
研究大气圈、水圈和岩石圈中的地磁场变化特征和相互关系，是探索日—地能量耦合及地球动力学过程的一个重要科学途径。分析海陆地磁观测数据差异及其规律，可更加深刻地认识海洋中地磁场变化特征及其影响因素。利用地磁场综合模型CM4与国际地磁参考场模型IGRF的计算结果与位于海南琼中地震台和南海深海海底的两个纬度相近、环境不同的陆域和海底地磁台观测数据进行对比，探讨三种不同类型数据在不同磁情环境下的形态、幅值和相位的相关程度及其影响因素。研究结果表明：① 受Dst指数影响，磁静日模型曲线与台站曲线的拟合程度比磁扰日好；海水介质中的感应磁场主导了海陆台站之间的幅值差，两者的经度不同导致了相位差；② 地磁场模型计算值和海陆台站观测值的幅值差与地磁活动强弱呈非线性正相关关系；③ K指数小于3时，地磁场模型计算值可应用于海洋磁测的日变改正中；K指数小于4时，需谨慎使用；K指数大于4时，不建议使用。
Abstract:
Exploring the sun-earth energy coupling and geodynamic process is an important scientific way to study the variation characteristics and interrelation of geomagnetic field in atmosphere，hydrosphere and lithosphere. By analyzing the difference and regularity of marine and land magnetic observation data，the authors can have a deeper understanding of the variation characteristics and influencing factors of marine geomagnetic field. This paper compared the calculation results of the geomagnetic field comprehensive model CM4 and the international geomagnetic reference field model IGRF with the observation data of land and submarine geomagnetic stations located in Qiongzhong seismic station of Hainan province and the deep seabed of the south China sea with similar latitudes and different environments，and discusses the correlation degree and the influencing factors of three types of data in different magnetic conditions，including the shape，amplitude and phase. The results show that: under the influence of Dst index，the fitting degree of model curve and station curve is better on magnetic static day than on magnetic disturbance day；the induced magnetic field in seawater dominates the amplitude difference between submarine and land stations，and the difference in longitude between them leads to the phase difference；The amplitude difference between the calculated value of the geomagnetic field model and the observed value of the submarine and land stations shows a non-linear positive correlation with the intensity of geomagnetic activity；when K index is less than 3，the calculated value of the geomagnetic field model can be applied to the diurnal variation correction of Marine magnetic measurement；when K index is less than 4，it should be used with caution；It is not recommended if the K index is greater than 4.

备注/Memo

备注/Memo:
收稿日期：2019-08-10
基金项目：国家重大科学仪器设备开发专项“海洋地磁场矢量测量仪开发与应用”（2014YQ100817）；中国地震局监测、预测、科研三结合课题“南海海底地磁日变站与邻近地磁台观测数据对比分析”（CEA-KC/3JH-161901）；阳江市科技计划项目“阳江深井地磁观测数据与其地下介质磁性特征关系的研究”（2016026）联合资助
作者简介：邢琮琮（1995- ），男，助理工程师，硕士，主要从事海洋地球物理技术方法研究。E-mail：391713824@qq.com.
通信作者：徐 行（1963- ），男，教授级高级工程师，硕士，主要从事海洋地球物理技术方法研究工作。
E-mail: gz_xuxing@163.com.
更新日期/Last Update: 2020-02-26