Further evidence for a global correlation of the Earth-ionosphere cavity resonances

1996 ◽  
Vol 23 (20) ◽  
pp. 2773-2776 ◽  
Author(s):  
M. Füllekrug ◽  
A. C. Fraser-Smith
Keyword(s):  
The Earth ◽  
Global Correlation ◽  
Cavity Resonances

ON THE THEORY OF SCHUMANN RESONANCES IN THE EARTH–IONOSPHERE CAVITY

1964 ◽  
Vol 42 (4) ◽  
pp. 575-582 ◽  
Author(s):  
James R. Wait
Keyword(s):  
Cavity Resonator ◽  
Current Work ◽  
Alternative Derivation ◽  
Schumann Resonances ◽  
The Earth ◽  
Cavity Resonances ◽  
Concentric Region ◽  
The Subject

The concept that the concentric region between the earth and the ionosphere acts as a cavity resonator was proposed by Schumann over a decade ago. It is the purpose of this paper to review the theory of these cavity resonances. Some of the assumptions used in current work on the subject are also discussed. An alternative derivation is presented which appears to be more general than any given heretofore.

scholarly journals IGCP 272 - Late Palaeozoic and Early Mesozoic circum-Pacific events and their global correlation

1992 ◽  
Vol 6 ◽  
pp. 85-85
Author(s):  
J. M. Dickins
Keyword(s):  
North America ◽  
Western Europe ◽  
Important Change ◽  
Upper Permian ◽  
Triassic Boundary ◽  
Early Mesozoic ◽  
The Earth ◽  
Late Palaeozoic ◽  
Global Correlation ◽  
Harsh Climate

IGCP 203 - Permo-Triassic events of eastern Tethys and their intercontinental correlation - focussed on the Permian-Triassic boundary sequences and in particular there was a consensus that the distinctive biological changes were associated with strong sea-level and tectonic change, strong volcanic activity and a harsh climate. These factors were connected with an important change in the environment and with the exception perhaps of the climate, reflected deep-seated changes within the earth. The project also resulted in improving the physical understanding of the sequences and their biostratigraphy and correlation.IGCP 272 was developed, and was approved in 1988, to apply these results to understanding the Late Palaeozoic and Early Mesozoic and was focussed on the Pacific as integration around this region seemed to offer especially fruitful possibilities.Working group meetings up to the end of 1991 have been held in Australia (Newcastle and Hobart), New Zealand (Dunedin), South America (Sao Paulo and Buenos Aires) and North America (Washington). Meetings are planned in North America, Japan, Eastern Siberia or Thailand and western Europe (France-Spain-Austria).Special cooperation has developed with the Carboniferous, Permian and Triassic Subcommissions of IUGS and with IGCP 214 - Global Bio-events. Using the more exact time correlations developed it has now been possible to show that major geological and biological events (of different levels of significance) are associated with major boundaries already recognized in the World Standard Stratigraphical Time Scale. These comprise the Carboniferous-Permian, the mid-Permian (twofold subdivision, the Permian-Triassic (already recognized in earlier work), the Lower-Middle and Middle-Upper Triassic and the Triassic-Jurassic boundaries.A special achievement of the project has been to show the similar significance of the Midian-Dzhulfian boundary within the Upper Permian but corresponding closely to the traditional Lower-Upper Permian of China and the Middle-Upper Permian of Japan.Although there are also other events at levels which have not been investigated by the project, those outlined all seem to reflect important changes within the earth.

Fine structure of the Earth-ionosphere cavity resonances

1968 ◽  
Vol 73 (15) ◽  
pp. 4986-4989 ◽  
Author(s):  
T. Røed Larsen ◽  
A. Egeland
Keyword(s):  
Fine Structure ◽  
The Earth ◽  
Cavity Resonances

Deep-water channel morphologies, architectures, and population densities in relation to stacking trajectories and climate states

2020 ◽  
Vol 133 (1-2) ◽  
pp. 287-306
Author(s):  
Chenglin Gong ◽  
Ronald J. Steel ◽  
Kun Qi ◽  
Yingmin Wang
Keyword(s):  
Deep Water ◽  
Water Channel ◽  
Lateral Migration ◽  
Population Densities ◽  
Submarine Channels ◽  
The Past ◽  
The Earth ◽  
Global Correlation ◽  
Lateral Channel ◽  
Low Degrees

Abstract Deep-water channel morphologies, stratigraphy, and population densities in relation to stacking trajectories and climate states remain poorly constrained, and are highlighted by a sampling of 142 submarine channels. From the perspective of channel kinematics, turbidite channels exhibit tripartite lateral - random - vertical trajectories or unidirectional channel-complex trajectories, whereas contourite channels display oblique upslope trajectories. Turbidite channels tend to be deep and narrow and have two to three times more lateral migration than contourite channels, whereas contourite channels tend to be shallow and wide and have two to three times more vertical accretion. We relate such differences between channel morphology and stratigraphy to density contrast between flow and ambient fluid for contourite versus turbidite channels, which seems to have favored lateral channel migration in turbidite channels but channel thalweg deposition in contourite channels. Additionally, channels formed during a greenhouse climate state display low degrees of morphological and architectural variations, and are the minority in our global channel database (8% of total), although the Earth has been in a greenhouse state for 72% of the past 540 m.y. Icehouse channels, in contrast, exhibit high amplitudes of morphological and architectural variations and are the majority in the global channel family (92% of total), although the Earth has been in an icehouse state for 18% of the past 540 m.y. Such differences in channel-population densities between greenhouse and icehouse climates (8% versus 92%) suggest a weak global correlation of channel-population densities with warming greenhouse climates.

Investigations of the lower ionosphere over Antarctica via ELF-VLF radiowaves

1993 ◽  
Vol 5 (1) ◽  
pp. 107-113 ◽  
Author(s):  
A. E. Reznikov ◽  
A. I. Sukhorukov ◽  
D. E. Edemskii ◽  
V. V. Kopeikin ◽  
P. A. Morozov ◽  
...  
Keyword(s):  
Near Field ◽  
Lower Ionosphere ◽  
Signal Propagation ◽  
Propagation Path ◽  
New Methods ◽  
The Earth ◽  
Resonance Band ◽  
Cavity Resonances ◽  
Lightning Discharges ◽  
Signal Propagation Path

The paper discusses ELF-VLF investigations of the low Antarctic ionosphere. Two new methods of lower ionospheric diagnostics are based on an investigation of the VLF electromagnetic field structure in the Earth-ionosphere cavity. One method deals with the analysis of local transverse cavity resonances in the near field of an emitter (a horizontal antenna) with a frequency (~1.5-8 kHz) in the range of the first few resonances. The other method, based on tweek investigations, is applicable under night conditions and enables the characteristics of the low ionosphere to be determined over a signal propagation path. The use of the ELF-VLF transmitter at Siple Station provides a unique opportunity to implement these methods, as does the ELF multipoint recording in the Schumann resonance band of atmospherics excited by powerful lightning discharges.

The motion of a lunar orbiter

1966 ◽  
Vol 25 ◽  
pp. 373
Author(s):  
Y. Kozai
Keyword(s):  
Degrees Of Freedom ◽  
Dimensional Space ◽  
Artificial Satellite ◽  
Equations Of Motion ◽  
Triaxial Ellipsoid ◽  
The Moon ◽  
Secular Motion ◽  
The Earth ◽  
Close Satellite ◽  
The Mean

The motion of an artificial satellite around the Moon is much more complicated than that around the Earth, since the shape of the Moon is a triaxial ellipsoid and the effect of the Earth on the motion is very important even for a very close satellite.The differential equations of motion of the satellite are written in canonical form of three degrees of freedom with time depending Hamiltonian. By eliminating short-periodic terms depending on the mean longitude of the satellite and by assuming that the Earth is moving on the lunar equator, however, the equations are reduced to those of two degrees of freedom with an energy integral.Since the mean motion of the Earth around the Moon is more rapid than the secular motion of the argument of pericentre of the satellite by a factor of one order, the terms depending on the longitude of the Earth can be eliminated, and the degree of freedom is reduced to one.Then the motion can be discussed by drawing equi-energy curves in two-dimensional space. According to these figures satellites with high inclination have large possibilities of falling down to the lunar surface even if the initial eccentricities are very small.The principal properties of the motion are not changed even if plausible values ofJ3andJ4of the Moon are included.This paper has been published in Publ. astr. Soc.Japan15, 301, 1963.

Formation of Lunar Craters and Bright Rays as a Result of Meteorite Impacts

1962 ◽  
Vol 14 ◽  
pp. 415-418
Author(s):  
K. P. Stanyukovich ◽  
V. A. Bronshten
Keyword(s):  
Explosive Charge ◽  
The Moon ◽  
Meteorite Impacts ◽  
The Earth ◽  
Lunar Craters ◽  
The Impact

The phenomena accompanying the impact of large meteorites on the surface of the Moon or of the Earth can be examined on the basis of the theory of explosive phenomena if we assume that, instead of an exploding meteorite moving inside the rock, we have an explosive charge (equivalent in energy), situated at a certain distance under the surface.

The Origin of the Moon

1962 ◽  
Vol 14 ◽  
pp. 149-155 ◽  
Author(s):  
E. L. Ruskol
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
The Moon ◽  
The Earth ◽  
The Difference ◽  
Origin Of The Moon

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

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