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Overview of the Various Models for Ice Ages

  • Donald RappEmail author
Chapter

Abstract

A number of models have been proposed to explain the alternating cycles of glaciation and interglacial cycles as follows:
  1. a.

    Solar: Variations in the innate solar intensity due to structural variations within the Sun may have caused glacial-interglacial cycles.

     
  2. b.

    Astronomical Theory: Quasi-periodic variations in eccentricity , obliquity and precession of the equinoxes produce changes in solar intensity to higher latitudes that cause glacial-interglacial cycles.

     
  3. c.

    Volcanism : Volcanism causes temporary changes in the Earth’s response to the Sun that may trigger initiation of longer-term glacial-interglacial cycles.

     
  4. d.

    Greenhouse Gases : Variability of concentrations of greenhouse gases (particularly CO2 and CH4) induced by unspecified events have been conjectured to be a cause of glacial-interglacial cycles via changes in the greenhouse effect.

     
  5. e.

    The Oceans: Variability in the thermohaline circulation of the oceans producing large changes in heat delivered to higher latitudes has been hypothesized to cause glacial-interglacial cycles.

     
  6. f.

    Extraterrestrial Accretion: Several models are based on effects due to quasi-periodic accretion of extraterrestrial dust in the Earth’s atmosphere as the primary forcing that induces changes in cloud cover that in turn, affects the climate.

     
  7. g.

    Ocean-Atmosphere Interactions: In this model, the primary factor that controls large-scale variations in the Earth’s climate is the albedo of the Earth, which in turn, is controlled by the degree of cloudiness which goes through repetitive cycles due to ocean-atmosphere interactions.

     

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.South PasadenaUSA

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