基于泰勒多项式及曲面样条函数的地电场变化分析
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摘要
选取江苏及邻区地电台网13个台站地电场观测分钟值,采用泰勒多项式和曲面样条函数模型建立地电日变化模型,使用模型曲线描述不同年份、同农历日期、同等磁情天气的实测地电日变化,结果表明:使用分钟值曲线建立的地电日变化模型,更能清晰反映日变化特点,并可反映一天当中台站观测环境、测量系统等变化引起的地电变化;使用同一区域地电台网中若干台站同方向测道的样本曲线,建立各测道电场变化模型,可反映其自身特征及共性特征。
The planar and time-varying models of the daily variation of the geo-electric field are built up based on the Taylor polynomial and surface spline function methods with minute values of geoelectric field observed at 13 stations in Jiangsu and its adjacent area. The model curves are used to describe the measured daily variation on the same lunar date in different years with the similar geomagnetic index K_p. The results show that: The model curves based on minute values of geoelectric field can more clearly give the daily variation features of geo-electric field and the geoelectric field changes caused by observation environment and measuring system at stations in a certain day; The models of the daily variation of the geo-electric field of each channel based on the sample curves of several stations in the same direction and regional network can reflect its own characteristics and common characteristics.
The planar and time-varying models of the daily variation of the geo-electric field are built up based on the Taylor polynomial and surface spline function methods with minute values of geoelectric field observed at 13 stations in Jiangsu and its adjacent area. The model curves are used to describe the measured daily variation on the same lunar date in different years with the similar geomagnetic index K_p. The results show that: The model curves based on minute values of geoelectric field can more clearly give the daily variation features of geo-electric field and the geoelectric field changes caused by observation environment and measuring system at stations in a certain day; The models of the daily variation of the geo-electric field of each channel based on the sample curves of several stations in the same direction and regional network can reflect its own characteristics and common characteristics.
引文
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王丽,杜学彬,武震,等.区域地电观测网地电场日变化模型研究[J].地震学报,2015,37(5):830-841.
叶青,杜学彬,周克昌,等.大地电场变化的频谱特征[J].地震学报,2007,29(4):382-390.
张学民,翟彦忠,郭学增,等.远震前的地电场潮汐波异常[J].地震学报,2007,29(1):48-58.
安振昌,谭东海.东亚地磁场的Taylor多项式模型[J].地震地磁观测与研究,1994,15(6):1-4.
崔腾发,杜学彬,叶青,等.中国大陆经纬链地电场日变化[J].地球物理学报,2013,56(7):2 358-2 368.
杜学彬,叶青,赵杰,等.地电场日变化研究[J].地震,2007,27(Z1):121-130.
傅承义,陈运泰,祁贵仲.地球物理学基础[M].北京:科学出版社,1985:203-254.
黄清华,刘涛.新岛台地电场的潮汐响应与地震[J].地球物理学报,2006,49(6):1 745-1 754.
克拉耶夫.地电原理-上册[M].张可迁,陈培光,张志诚,等译.北京:地质出版社,1954:100-236.
李金铭.地电场与电法勘探[M].北京:地质出版社,2005:36-54.
柳士俊,周小刚,孙涵,等.用于区域地磁场模型计算的三维Taylor多项式方法[J].地球物理学进展,2011,2(64):1 165-1 174.
孙正江,王华俊.地电概论[M].北京:地震出版社,1984:3-95.
谭大诚,赵家骝,席继楼,等.潮汐地电场特征及机理研究[J].地球物理学报,2010,53(3):544-555.
田山,王建国,徐学恭,等.大地电场观测地震前兆异常提取技术研究[J].地震学报,2009,31(4):424-431.
王丽,杜学彬,武震,等.区域地电观测网地电场日变化模型研究[J].地震学报,2015,37(5):830-841.
叶青,杜学彬,周克昌,等.大地电场变化的频谱特征[J].地震学报,2007,29(4):382-390.
张学民,翟彦忠,郭学增,等.远震前的地电场潮汐波异常[J].地震学报,2007,29(1):48-58.