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Variations in Solar Radiation and the Cause of Ice Ages

  • F. Hoyle and R. A. Lyttleton (a1)

Abstract

Most astronomical hypotheses on the causes of ice ages are dynamically untenable. Alterations in the amount of solar radiation, however, have long been recognized as a possible cause, but only with recent progress in the theory of stellar evolution has it become clear that such changes must occur. At irregular intervals the sun will pass, and will have passed, with low relative speeds through interstellar hydrogen clouds, and the gravitational action of the sun leads to an increase in the quantity of material falling to the surface with high velocity. The conversion of the kinetic energy of fall of this material results in an increase of emission at the solar surface. Increases of order up to about 10 per cent of the present total radiation could occur, and the process is such that the extra energy would be located mainly in the shorter wavelengths.

Zusammenfassung

Die meisten astronomischen Hypothesen über die Ursachen der Eiszeiten sind dynamisch unhaltbar. Änderungen im Ausmass der Sonnenstrahlungen sind indessen seit langem als eine mögliche Ursache anerkannt, jedoch erst durch den jüngsten Fortschritt in der Theorie der Entwicklung der Sterne ist es klar geworden, dass solche Änderungen stattfinden müssen. Die Sonne wird sich in unregelmässigen Zwischenräumen mit geringer relativer Geschwindigkeit durch die sich zwischen den Sternen befindlichen Wasserstoff Wolken bewegen und bewegt haben, und die Gravitationskraft der Sonne führt dazu, dass die Quantität an Material, die mit grosser Geschwindigkeit auf die Oberfläche fällt, zunimmt. Die Umsetzung der kinetischen Energie dieses fallenden Materials führt zu einer erhöhten Ausstrahlung an der Sonnenoberfläche. Diese Zunahme an Ausstrahlung könnte sich bis auf circa 10% der gegenwärtigen Totalstrahlung belaufen, und der Prozess verläuft so, dass die Extraenergie sich hauptsächlich in den kürzeren Wellenlangen befinden würde.

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Variations in Solar Radiation and the Cause of Ice Ages

  • F. Hoyle and R. A. Lyttleton (a1)

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