Results 21 to 30 of about 174,034 (295)
Atmosphere, 2021 The Earth’s ionosphere presents long-term trends that have been of interest since a pioneering study in 1989 suggesting that greenhouse gases increasing due to anthropogenic activity will produce not only a troposphere global warming, but a cooling in ...
Ana G. Elias +5 more
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First Full Vector Archeomagnetic Data From Northern Mexico
Geochemistry, Geophysics, Geosystems, 2021 Several regional secular variation curves of the geomagnetic field have been proposed for Mexico over the last millennia. Despite a fairly large number of archeomagnetic data, these curves remain imprecise because of an uneven quality and geographic ...
B. Tchibinda Madingou +5 more
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Evidence for a geomagnetic jerk in 1990 across Europe
Annals of Geophysics, 1995 The analysis of geomagnetic data from magnetic observatories demonstrated the existence of very rapid changes, or jerks, in the secular variation, especially the occurrence of the well known geomagnetic jerks of 1969 and 1978.
A. Meloni, L. Cafarella
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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 ...
openaire +1 more source
Fortnightly Fluctuations in the O-C Diagram of CS 1246 [PDF]
, 2011 Dominated by a single, large-amplitude pulsation mode, the rapidly-pulsating hot subdwarf B star CS 1246 is a prime candidate for a long-term O-C diagram study. We collected nearly 400 hours of photometry with the PROMPT telescopes over a time span of 14
A. P. LaCluyze +37 more
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An upper limit to the secular variation of the gravitational constant from white dwarf stars [PDF]
, 2011 A variation of the gravitational constant over cosmological ages modifies the main sequence lifetimes and white dwarf cooling ages. Using an state-of-the-art stellar evolutionary code we compute the effects of a secularly varying G on the main sequence ...
A. Maeder +17 more
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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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Estimating global bank network connectedness [PDF]
, 2015 We use lasso methods to shrink, select and estimate the network linking the publicly-traded subset of the world's top 150 banks, 2003-2014. We characterize static network connectedness using full-sample estimation and dynamic network connectedness using ...
Demirer, Mert +3 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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Effect of Sun and Planet-Bound Dark Matter on Planet and Satellite Dynamics in the Solar System [PDF]
, 2010 We apply our recent results on orbital dynamics around a mass-varying central body to the phenomenon of accretion of Dark Matter-assumed not self-annihilating-on the Sun and the major bodies of the solar system due to its motion throughout the Milky Way ...
+23 more
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