17世纪以来南美洲磁偏角的演变

IF 1.7 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
Germán Guillén-Arandía , Rafael García-Ruiz , Avto Goguitchaichvili , Miguel Ángel Cervantes Solano
{"title":"17世纪以来南美洲磁偏角的演变","authors":"Germán Guillén-Arandía ,&nbsp;Rafael García-Ruiz ,&nbsp;Avto Goguitchaichvili ,&nbsp;Miguel Ángel Cervantes Solano","doi":"10.1016/j.jsames.2025.105434","DOIUrl":null,"url":null,"abstract":"<div><div>Magnetic declination, the first measurable angular component of the magnetic field was longtime considered as an essential element to facilitate the navigation. Direct, historical measurements of the Earth Magnetic Field's components were commonly carried out during maritime exploration campaigns. Therefore, this invaluable source of information provides an almost unique tool to reveal the ‘geomagnetic past’ of our planet. Thanks to the development (and continuous updating) of historical and global geomagnetic databases, it is now possible to access a numerous geomagnetic field measurement. In particular, 400 years of continuous declination data are available for South America. The primary objective of this study is to estimate the temporal and spatial variation of historical declination values and try to define some fine characteristics of the geomagnetic field. A database of 12,462 well-distributed declination measurements across South America including the margins of Atlantic and Pacific Oceans, was compiled. The whole area was divided into six sub-regions in Brazil (2), Peru (1), Chile (1), Argentina (1) and Uruguay (1) in order to obtain local paleosecular variation curves and meet the mandatory requirement of relocation error procedure. These curves were generated using the Bootstrap algorithm and the penalized cubic spline method. The paleosecular variation curves were compared with currently available global geomagnetic models. Three local curves showed significant differences from the models due to the relatively uneven distribution of the geomagnetic data. First and second temporal derivative of paleosecular variation curves revealed the most significant fluctuations while the global data analysis confirms the existence of the so-called westward drift.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"156 ","pages":"Article 105434"},"PeriodicalIF":1.7000,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Evolution of magnetic declination in South America since the 17th century\",\"authors\":\"Germán Guillén-Arandía ,&nbsp;Rafael García-Ruiz ,&nbsp;Avto Goguitchaichvili ,&nbsp;Miguel Ángel Cervantes Solano\",\"doi\":\"10.1016/j.jsames.2025.105434\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Magnetic declination, the first measurable angular component of the magnetic field was longtime considered as an essential element to facilitate the navigation. Direct, historical measurements of the Earth Magnetic Field's components were commonly carried out during maritime exploration campaigns. Therefore, this invaluable source of information provides an almost unique tool to reveal the ‘geomagnetic past’ of our planet. Thanks to the development (and continuous updating) of historical and global geomagnetic databases, it is now possible to access a numerous geomagnetic field measurement. In particular, 400 years of continuous declination data are available for South America. The primary objective of this study is to estimate the temporal and spatial variation of historical declination values and try to define some fine characteristics of the geomagnetic field. A database of 12,462 well-distributed declination measurements across South America including the margins of Atlantic and Pacific Oceans, was compiled. The whole area was divided into six sub-regions in Brazil (2), Peru (1), Chile (1), Argentina (1) and Uruguay (1) in order to obtain local paleosecular variation curves and meet the mandatory requirement of relocation error procedure. These curves were generated using the Bootstrap algorithm and the penalized cubic spline method. The paleosecular variation curves were compared with currently available global geomagnetic models. Three local curves showed significant differences from the models due to the relatively uneven distribution of the geomagnetic data. First and second temporal derivative of paleosecular variation curves revealed the most significant fluctuations while the global data analysis confirms the existence of the so-called westward drift.</div></div>\",\"PeriodicalId\":50047,\"journal\":{\"name\":\"Journal of South American Earth Sciences\",\"volume\":\"156 \",\"pages\":\"Article 105434\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2025-02-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of South American Earth Sciences\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0895981125000963\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of South American Earth Sciences","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0895981125000963","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

摘要

磁偏角是磁场中第一个可测量的角度分量,长期以来被认为是促进航海的重要因素。对地球磁场分量的直接、历史测量通常是在海上勘探活动中进行的。因此,这个宝贵的信息来源提供了一个几乎独一无二的工具来揭示我们星球的“地磁过去”。由于历史和全球地磁数据库的发展(和不断更新),现在有可能获得大量的地磁场测量结果。特别是南美洲400年的连续赤纬资料。本研究的主要目的是估计历史赤纬值的时空变化,并试图定义地磁场的一些精细特征。一个包含12462个分布均匀的赤纬测量数据的数据库,横跨南美洲,包括大西洋和太平洋的边缘。为了获得局部古长期变化曲线,满足迁移误差程序的强制性要求,将整个区域划分为巴西(2)、秘鲁(1)、智利(1)、阿根廷(1)和乌拉圭(1)6个子区域。这些曲线分别采用Bootstrap算法和罚三次样条法生成。将古长期变化曲线与现有的全球地磁模型进行了比较。由于地磁资料分布相对不均匀,3条局部曲线与模型存在显著差异。古长期变化曲线的一阶和二阶导数显示出最显著的波动,而全球数据分析证实了所谓的西向漂移的存在。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evolution of magnetic declination in South America since the 17th century
Magnetic declination, the first measurable angular component of the magnetic field was longtime considered as an essential element to facilitate the navigation. Direct, historical measurements of the Earth Magnetic Field's components were commonly carried out during maritime exploration campaigns. Therefore, this invaluable source of information provides an almost unique tool to reveal the ‘geomagnetic past’ of our planet. Thanks to the development (and continuous updating) of historical and global geomagnetic databases, it is now possible to access a numerous geomagnetic field measurement. In particular, 400 years of continuous declination data are available for South America. The primary objective of this study is to estimate the temporal and spatial variation of historical declination values and try to define some fine characteristics of the geomagnetic field. A database of 12,462 well-distributed declination measurements across South America including the margins of Atlantic and Pacific Oceans, was compiled. The whole area was divided into six sub-regions in Brazil (2), Peru (1), Chile (1), Argentina (1) and Uruguay (1) in order to obtain local paleosecular variation curves and meet the mandatory requirement of relocation error procedure. These curves were generated using the Bootstrap algorithm and the penalized cubic spline method. The paleosecular variation curves were compared with currently available global geomagnetic models. Three local curves showed significant differences from the models due to the relatively uneven distribution of the geomagnetic data. First and second temporal derivative of paleosecular variation curves revealed the most significant fluctuations while the global data analysis confirms the existence of the so-called westward drift.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Journal of South American Earth Sciences
Journal of South American Earth Sciences 地学-地球科学综合
CiteScore
3.70
自引率
22.20%
发文量
364
审稿时长
6-12 weeks
期刊介绍: Papers must have a regional appeal and should present work of more than local significance. Research papers dealing with the regional geology of South American cratons and mobile belts, within the following research fields: -Economic geology, metallogenesis and hydrocarbon genesis and reservoirs. -Geophysics, geochemistry, volcanology, igneous and metamorphic petrology. -Tectonics, neo- and seismotectonics and geodynamic modeling. -Geomorphology, geological hazards, environmental geology, climate change in America and Antarctica, and soil research. -Stratigraphy, sedimentology, structure and basin evolution. -Paleontology, paleoecology, paleoclimatology and Quaternary geology. New developments in already established regional projects and new initiatives dealing with the geology of the continent will be summarized and presented on a regular basis. Short notes, discussions, book reviews and conference and workshop reports will also be included when relevant.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信