Results 41 to 50 of about 4,233 (235)

Nonlinearity in a dynamo [PDF]

, 2009
Using a rotating flat layer heated from below as an example, we consider effects which lead to stabilizing an exponentially growing magnetic field in magnetostrophic convection in transition from the kinematic dynamo to the full non-linear dynamo.
Cattaneo F, Chandrasekhar S, Hughes D, Kazantsev AP, Kleeorin N, M. Reshetnyak, Moffatt HK, P. Hejda, Rose HA, Zeldovich YaB   +9 more
core   +1 more source

The clustering of polarity reversals of the geomagnetic field

, 2006
Often in nature the temporal distribution of inhomogeneous stochastic point processes can be modeled as a realization of renewal Poisson processes with a variable rate.
A. Kageyama, A. Vecchio, D. L. Turcotte, D. V. Kent, F. Lepreti, H. K. Moffatt, I. Guerra, J. R. Heirtzler, L. Sorriso-Valvo, P. Harabaglia, P. Veltri, P. L. McFadden, R. Hollerbach, R. T. Merril, S. P. Huestis, T. Rikitake, V. Carbone, W. Feller   +17 more
core   +1 more source

Комплекс программ моделирования геодинамо на основе спектральных эредитарных моделей

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki
Исследование задачи геодинамо часто проводят на основе спектральных моделей, когда поля задачи полностью или частично раскладываются по собственным полям (модам) подходящих спектральных задач.
Водинчар, Г.М., Казаков, Е.А., Фещенко, Л.К.   +2 more
doaj   +1 more source

Variational data assimilation for the initial-value dynamo problem [PDF]

, 2011
The secular variation of the geomagnetic field as observed at the Earth's surface results from the complex magnetohydrodynamics taking place in the fluid core of the Earth.
Andrew Jackson, B. P. Jones, D. Gubbins, G. Backus, G. Evensen, G. W. Hanson, H. K. Moffatt, J. Larmor, J. Nocedal, J. P. Aubin, J. P. Boyd, K. Ito, Kuan Li, M. Kono, O. Talagrand, Philip W. Livermore, R. D. Gibson, R. L. Parker, R. Reed, T. H. Cormen, T. Namikawa, W. Kuang, W. Kuang   +22 more
core   +1 more source

Solar Magnetic Field Reversals and the Role of Dynamo Families [PDF]

, 2012
The variable magnetic field of the solar photosphere exhibits periodic reversals as a result of dynamo activity occurring within the solar interior. We decompose the surface field as observed by both the Wilcox Solar Observatory and the Michelson Doppler
A. S. Brun, Abramowitz, Alexakis, Basu, Browning, Brun, Böhm-Vitense, Cattaneo, Charbonneau, Choudhuri, Dikpati, Dikpati, Dikpati, Guckenheimer, Hoeksema, J. T. Hoeksema, Karak, Knobloch, M. L. DeRosa, Melbourne, Moffatt, Pétrélis, Racine, Reiners, Reiners, Ribes, Roberts, Ruzmaikin, Saar, Schrijver, Stenflo, Strugarek, Tobias, Valet, Yeates   +34 more
core   +3 more sources

On the Precession Driven Geodynamo [PDF]

Izvestiya, Physics of the Solid Earth, 2006
Formation of flow structures in the Earth’s liquid core enclosed in a precessing and rotating shell (mantle) is examined within the hydrodynamic approach. The kinematics and energetics of the motions in the Earth’s core initiated by precession allow one to regard these motions as a possible geodynamo mechanism at an early evolutionary stage of the ...
openaire   +1 more source

A fuel-efficient geodynamo? [PDF]

Nature, 2004
R. Holme
openaire   +2 more sources

Многомасштабная модель геодинамо: сопряжение крупномасштабной и мелкомасштабной подмоделей

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki
Формирование главного геомагнитного поля обеспечивается работой механизма гидромагнитного динамо — генерации магнитного поля движением проводящей среды. Динамо Земли (геодинамо) управляется конвекцией жидкого металла во внешнем ядре Земли.
Водинчар, Г.М., Фещенко, Л.К.   +1 more
doaj   +1 more source

Sulfur‐Bearing hcp Iron for Earth's Inner Core

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Earth's iron core is believed to contain light impurities which should have been included during core formation. In order to place constraints on core composition, here we report the effect of sulfur on density of hexagonal close‐packed (hcp) iron which was not previously examined, using laser‐heated diamond anvil cells with in situ ...
Emiko Sugimura‐Komabayashi, Samuel Thompson, Tetsuya Komabayashi, Damien Freitas, Mark Robertson, Nico Giordano, Anna Pakhomova, Hanns‐Peter Liermann   +7 more
wiley   +1 more source

Geodynamo alpha-effect derived from box simulations of rotating magnetoconvection

, 2004
The equations for fully compressible rotating magnetoconvection are numerically solved in a Cartesian box assuming conditions roughly suitable for the geodynamo.
A. Giesecke, Buffet, Busse, Chandrasekhar, Christensen, G. Rüdiger, Hollerbach, Hollerbach, Kitchatinov, Krause, Olson, Ossendrijver, Ossendrijver, Roberts, Rüdiger, Schmitt, Soward, Stefani, Stefani, U. Ziegler, Ziegler, Ziegler, Ziegler, Ziegler   +23 more
core   +1 more source