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| Titel |
Gravitational mechanism of active life of the Earth, planets and satellites |
| VerfasserIn |
Yury Barkin |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250036289
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| Zusammenfassung |
| Abstract. From positions of geodynamic model of the forced gravitational swing, wobble
and displacements of shells of a planet are studied and fundamental problems of
geodynamics, geology, geophysics, planetary sciences are solved etc.: 1) The mechanism of
cyclic variations of activity of natural processes in various time scales. 2) The power of
endogenous activity of planetary natural processes on planets and satellites. 3) The
phenomenon of polar inversion of natural processes on planets and satellites. 4) Spasmodic
and catastrophic changes of activity of natural processes. 5) The phenomenon of twisting of
hemispheres (latitude zones or belts) of celestial bodies. 6) Formation of the pear-shaped
form of celestial bodies and the mechanism of its change. 7) The ordered planetary structures
of geological formations. 8) The phenomena of bipolarity of celestial bodies and antipodality
of geology formations.
Mechanism. The fundamental feature of a structure of celestial bodies is their shell
structure. The most investigated is the internal structure of the Earth. For the Moon and
wide set of other bodies of solar system models of an internal structure have been
constructed on the basis of the data of observations obtained at studying of their
gravitational fields as a result of realization of the appropriate space missions. The basic
components for the majority of celestial bodies are the core, the mantle and the
crust. To other shells we concern atmospheres (for example, at Venus, Mars, the
Titan etc.) and oceanic shells (the Titan, the Earth, Enceladus etc.). Shells are the
complex (composite) formations. Planets and satellites are not spherical celestial
bodies. The centers of mass of shells of the given planet (or the satellite) and their
appropriate principal axes of inertia do not coincide. Accordingly, all their shells
are characterized by the certain dynamic oblatenesses. Differences of dynamical
oblatenesses results in various forced influences of external celestial bodies on
shells of the given body. Dynamical oblatenesses of shells, thus, characterize the
endogenous activity of a planet by external celestial bodies. Other important factor of
endogenous activity of a planet is a eccentric position of the centers of mass of
the shells (for example, of the core and the mantle). The eccentricity of the shells
is inherited during geological evolution of a planet as system of shells (Barkin,
2002).
Consequences of exitation of the Earth system. The new tides (Barkin, 2005) are
caused by relative displacements of the core and mantle. These displacements are reflected in
variations of many natural processes due to gravitational action of the core. The displacing
core causes deformations of all layers of viscous-elastic mantle. In the given work from more
general positions the mechanisms of excitation of a system of shells of the Earth under action
of a gravitational attraction of the Sun, the Moon and planets, the phenomena of their relative
swings, translational displacements and turns relatively from each other, and the wide list
geodynamical consequences of the specified excitation of the Earth are studied. At
once we shall emphasize, that the developed geodynamic model has allowed to
carry out the important dynamic researches of displacements of shells of the Earth,
their deformations and changes, and variations of its natural processes and for the
first time to explain the nature of such fundamental phenomena and processes in
geodynamics, geology and geophysics as: cyclicity of natural processes and its mechanism;
power of processes in various time scales; unity of cyclic processes and universality
of their frequency bases; synchronism of geodynamic, geophysical, biophysical
and social events; inversion, contrast and opposite directed changes of activity of
natural processes in opposite hemispheres of the Earth; step-by-step variations
of natural processes, sawtooth course of activity of natural processes in various
time scales; orderliness in an distribution of geological formations on the Earth,
planets and satellites; existence of antipodal formations on planets and satellites;
the phenomenon of twisting of hemispheres of bodies of solar system, twisting of
layers and latitudinal zones of shells of celestial bodies including inner layers and
shells, etc. All the specified phenomena from the resulted list to some extent are
discussed in the given work and illustrated on the basis of modern researches in Earth’s
sciences and the researches executed by means of space missions. In a complex,
the executed researches have shown universality of discussed mechanisms and
their important role in dynamics and geoevolution of planets and satellites in other
planetary systems, and also stars and pulsars with the systems of planets (Barkin,
2009).
Cyclicity. The excitation on the part of external celestial bodies of the system core-mantle
depends from relative positions of external celestial bodies, from particularities of their
perturbed orbital motions and from rotary motion of the planet. The specified motions have a
cyclic nature which is shown in various time scales. Hence, and excitation of shells and their
layers will have also cyclic character and to be shown in various time scales. Hence, cyclic
variations of all planetary natural processes in all the variety widely should be observed, as
takes place in reality. The periods of variations are characterized by extremely wide
range - from hours up to tens and hundreds millions years. If the core makes slow
secular drift relatively to the mantle all layers and shells of the Earth test secular
deformation, thermodynamic and other changes. The cavity of the core and its flows are
changed slowly that results in secular variations of a magnetic field (Barkin, 2002,
2009).
Inversion and asymmetry of cyclic and secular variations of natural processes. The
essence of it rather wide distributed phenomena is, that activity of natural processes varies in
an antiphase in opposite hemispheres of the Earth (first of all in northern and southern
hemispheres). Told concerns to all geodynamic and geophysical processes, to variations of
physical fields, to tectonic and geodetic reorganizations of layers of the Earth, to
redistributions of atmospheric, oceanic and other fluid masses of the Earth. The certain
asymmetry of displays of processes in northern and southern hemispheres on the other
hand is marked. So secular trends of some processes are contrast in northern and
southern hemispheres, i.e. velocities of secular changes are essentially different.
All described phenomena are caused first of all by cyclic oscillations and secular
drift of the core to the north (in present epoch). In longer time scales the similar
phenomena of inversion, dissymmetry also have place and determine a nature and style of
displacements of continents and lithospheric plates, planetary magmatic activity and
plume tectonics as a whole, formation of mountains, elevations and depressions,
systems of lineaments and cracks, regressions and transgressions of sea level (Barkin,
2002).
Synchronous steps of activity of natural processes. “For an explanation of observably
step-by-step variations of geodynamic and geophysical processes the mechanism of sharp
sporadic relative displacements of the core and the mantle and deformations of the mantle in
the certain periods of time (the phenomenon of "galloping of the core”) is offered. |
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