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Geomagnetic secular variation [PDF]
Eos, Transactions American Geophysical Union, 1971 This review attempts to reference the works on geomagnetic secular change that have appeared by authors based, even if temporarily, in the United States since 1967. It is thus an extension of the last portion of the paper given for the 1967 ‘Main Geomagnetic Field’ IUGG report [Cain, 1967], excluding the topics of field models and magnetic surveys ...
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Dizhen xuebao, 2019 为探索地磁长期变化中地磁急变事件的识别方法，分析地磁急变的特征，本文基于多个地磁台站子夜均值数据，利用线性拟合方法计算了地磁场X，Y和Z三个分量的年变率，对近年来发生的地磁急变事件进行了识别和分析。结果显示：Y分量能对分析时段内已报道的地磁急变事件进行很好的识别，其中1999年的地磁急变事件，在我国区域内发生的时间可能为1998年，此外2017年可能存在一个新的地磁急变事件；Z分量年变率整体变化平缓，2001年和2013年前后发生两次显著的地磁年变率变化 ...
Yufei He +4 more
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SECULAR BEHAVIOR IN THE GEOMAGNETIC DATA AT PERMANENTOBSERVATORIES IN ARGENTINA
Anales (Asociación Física Argentina)The secular variation of the geomagnetic field is the temporal variation that takes place in the field on time scales between few years to hundreds or thousands of years.
P. A. Sallago
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Geochemistry, Geophysics, Geosystems, 2014 One of the main challenges of paleomagnetic research is to obtain high‐resolution geomagnetic field intensity reconstructions. For the last millennia, these reconstructions are mostly based on archeomagnetic data.
Francisco Javier Pavón‐Carrasco +4 more
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Movement Ecology, 2023 Background For many migratory species, inexperienced (naïve) individuals reach remote non-breeding areas independently using one or more inherited compass headings and, potentially, magnetic signposts to gauge where to switch between compass headings ...
James D. McLaren +2 more
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Reconstruction of secular variation in seawater sulfate concentrations [PDF]
Biogeosciences, 2015 Long-term secular variation in seawater sulfate concentrations ([SO42−]SW) is of interest owing to its relationship to the oxygenation history of Earth's surface environment. In this study, we develop two complementary approaches for quantification
T. J. Algeo +4 more
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Russian Journal of Earth Sciences, 2022 The article provides information about the Yangibazar geomagnetic observatory, managed by the Institute of Seismology of the Academy of Sciences of the Republic of Uzbekistan.
Yusupov Valizhon +2 more
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Jovimagnetic secular variation [PDF]
, 2013 Planetary dynamos, resulting from fluid flow in electrically conductive parts of their interior, are thought to be highly time dependent. Currently, our understanding of temporal variation of these fields is limited because we only have observations for one example, the Earth.
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Geomagnetic secular variation 1995–2000 [PDF]
Journal of Geophysical Research: Solid Earth, 2003 A study was done to determine the difficulty of obtaining a field model for 1995 using magnetic observations taken since that epoch. Ørsted vector data taken from 1999 to 2001 in conjunction with scalar data from all surface ship surveys and secular variation data from magnetic observatories taken since 1995 were utilized.
Joseph C. Cain +3 more
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Secular change in the location of the magnetic dip equator in the twentieth century [PDF]
Geofísica Internacional, 2000 Using the spherical harmonic coefficients defining the International Geomagnetic Reference Field Models for the 21 epochs 1900 to 2000, the geographic locations of the dip equator in different longitudes were computed.
L.M. Barreto, G.K. Rangarajan
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