Preprints
https://doi.org/10.5194/cp-2021-10
https://doi.org/10.5194/cp-2021-10

  16 Feb 2021

16 Feb 2021

Review status: this discussion paper is a preprint. It has been under review for the journal Climate of the Past (CP). The manuscript was not accepted for further review after discussion.

A Modified Milankovitch theory that reconciles contradictions with the paleoclimate record

Robert E. Wong1, Robert E. Wong
  • 1TRW Space and Technology Group (Currently subsidiary of Northrop Corporation), One Space Park, Redondo Beach, California, United States of America
  • retired

Abstract. Based upon research results over the past five decades, there has been a general acceptance that the ice ages were initiated by astronomical phenomenon. Specifically, marine, ice and terrestrial paleoclimate data have supported elements of the Milankovitch astronomical theory of the ice ages. However, there remain unresolved problems between the empirical findings and theory. The 100 thousand year problem has been the subject of extensive research since a 100 thousand year cycle that matches the Earth orbit eccentricity period dominates the frequencies found in paleoclimate records. Yet, eccentricity produces an insignificant variation in annual solar energy. Other problems include the Stage 11 problem, the missing interglacials problem, how glaciation is sustained over multiple tens of thousands of years and synchronous hemispheric glaciation. I shall show these problems are resolved by modification of the prevailing Milankovitch theory. In particular, two elements of the theory need modification. One is the limitation of eccentricity's role and the other assuming that glaciation results only from cool summer conditions. By applying the Solar Energy Invariance law to define e-seasons, how eccentricity provides conditions for glaciation is demonstrated. The results show eccentricity variations provide significant solar energy variations at the top of the earth's atmosphere to produce glaciation that is global. Global glaciation results in colder winter glaciation occurring in one hemisphere simultaneous with cool summer glaciation in the other hemisphere. Analysis with these modifications resolves each of the problems.

Robert E. Wong

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on cp-2021-10', Anonymous Referee #1, 04 Mar 2021
  • RC2: 'Comment on cp-2021-10', Anonymous Referee #2, 26 Mar 2021
  • RC3: 'Comment on cp-2021-10', Anonymous Referee #3, 30 Mar 2021

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on cp-2021-10', Anonymous Referee #1, 04 Mar 2021
  • RC2: 'Comment on cp-2021-10', Anonymous Referee #2, 26 Mar 2021
  • RC3: 'Comment on cp-2021-10', Anonymous Referee #3, 30 Mar 2021

Robert E. Wong

Robert E. Wong

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Short summary
Based upon research results over the past five decades, there is a general acceptance that the ice ages were produced by astronomical phenomenon as theorized by Milutin Milankovitch. However, unresolved contradictions between the empirical findings and theory remain. Several theory modifications show how Earth's eccentricity provides conditions for global glaciation. Global glaciation including colder winter glaciation resolves the contradictions addressed including the 100,000 year problem.