Geomagnetic secular variation since 1901 [PDF]
Deep Sea Research Part B. Oceanographic Literature Review, 1981 Summary. All available annual means, from the world-wide network of magnetic observatories, of north intensity (X), east intensity (Y) and vertical intensity (Z) from 1901 to 1977 are subjected to spherical harmonic analysis to obtain 38 models of the Earth's geomagnetic field at two-year intervals.
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Twenty years of geomagnetic field observations at Mario Zucchelli Station (Antarctica)
Annals of Geophysics, 2009 During the 1986-87 austral summer a geomagnetic observatory was installed at Terra Nova Bay. During the first<br />years both geomagnetic field time variation monitoring and absolute measurements were carried out only during<br />summer ...
Lucia Santarelli +3 more
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Изменения геомагнитного поля Антарктики за последнее столетие
Український антарктичний журнал, 2020 Определены особенности изменения геомагнитного поля в Антарктике в XX столетии по данным расчетов по модели IGRF (International Geomagnetic Reference Field) и наблюдений на обсерваториях. Получено, что в Южном полушарии полный вектор геомагнитного поля F
G. Melnyk +2 more
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Geophysical Monograph Series, Page i-xiv., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
wiley +1 more source
Planetary gyre, time-dependent eddies, torsional waves, and equatorial jets at the Earth's core surface [PDF]
, 2015 We report a calculation of time-dependent quasi-geostrophic core flows for 1940-2010. Inverting recursively for an ensemble of solutions, we evaluate the main source of uncertainties, namely the model errors arising from interactions between unresolved ...
Finlay, C. C., Gillet, N, Jault, D
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Centennial to millennial geomagnetic secular variation [PDF]
Geophysical Journal International, 2006 SUMMARY A time-varying spherical harmonic model of the palaeomagnetic field for 0‐7 ka is used to investigate large-scale global geomagnetic secular variation on centennial to millennial scales. We study dipole moment evolution over the past 7 kyr, and estimate its rate of change using the Gauss coefficients of degree 1 (dipole coefficients) from the ...
Korte, M., Constable, C.
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ANOMALOUS CHANGES OF THE GEOMAGNETIC FIELD VERTICAL COMPONENT IN KAMCHATKA
Vestnik KRAUNC: Fiziko-Matematičeskie Nauki, 2016 Considered secular variation of the geomagnetic field in the vertical observatories Paratunka (Kamchatka), Kakioka, Mamambetsu and holders (Irkutsk) from 1968 to ...
Moroz,, Smirnov, S.E., Nazarova, Z.A.
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Geomagnetic Core Field Secular Variation Models
Space Science Reviews, 2009 We analyse models describing time changes of the Earth’s core magnetic field (secular variation) covering the historical period (several centuries) and the more recent satellite era (previous decade), and we illustrate how both the information contained in the data and the a priori information (regularisation) affect the result of the ill-posed ...
Gillet, N., Lesur, V., Olsen, N.
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Geomagnetic Secular Variation, 1962.5 to 1967.5 [PDF]
Geophysical Journal International, 1974 Summary Mean values of observatory geomagnetic data for the intervals 1960.0 to 1965.0 and 1965.0 to 1970.0 are subjected to spherical harmonic analysis to obtain coefficients of the main magnetic field. Since the same set of 118 observatories was used for each interval, the difference between the two sets of coefficients gives a reliable measure of ...
S. R. C. Malin, A. D. Clark
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Physics-based secular variation candidate models for the IGRF
Earth, Planets and Space, 2021 Each International Geomagnetic Reference Field (IGRF) model released under the auspices of the International Association of Geomagnetism and Aeronomy comprises a secular variation component that describes the evolution of the main magnetic field ...
Alexandre Fournier +3 more
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