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The Jormungand Climate Model

Rackauckas, Christopher V
http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1368151558

Abstract Details

2013, BA, Oberlin College, Mathematics.
The geological and paleomagnetic record indicate that around 750 million and 580 millions years ago glaciers grew near the equator, though as of yet we do not fully understand the nature of these glaciations. The well-known Snowball Earth Hypothesis states that the Earth was covered entirely by glaciers. However, it is hard for this hypothesis to account for certain aspects of the biological evidence such as the survival of photosynthetic eukaryotes. Thus the Jormungand Hypothesis was developed as an alternative to the Snowball Earth Hypothesis. In this paper we investigate previous models of the Jormungand state and look at the dynamics of the Hadley cells to develop a new model to represent the Jormungand Hypothesis. We end by solving for an analytical approximation to the model using a finite Legendre expansion and geometric singular perturbation theory. The resultant model gives a stable equilibrium point near the equator with strong hysteresis that satisfies the Jormungand Hypothesis.
Jim Walsh (Advisor)
19 p.
Climate Change; Mathematics
Dynamical Systems; Mathematical Climatology; Snowball Earth; Geometric Singular Perturbation Theory; Legendre Polynomials; Jormungand State; Fast-Slow Systems; Numerical Simulations; Hysteresis; Ice-Albedo Feedback; Budkyo-Widiasih Model

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Citations

  • Rackauckas, C. V. (2013). The Jormungand Climate Model [Undergraduate thesis, Oberlin College]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1368151558

    APA Style (7th edition)

  • Rackauckas, Christopher. The Jormungand Climate Model. 2013. Oberlin College, Undergraduate thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1368151558.

    MLA Style (8th edition)

  • Rackauckas, Christopher. "The Jormungand Climate Model." Undergraduate thesis, Oberlin College, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1368151558

    Chicago Manual of Style (17th edition)

oberlin1368151558
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© 2013, all rights reserved.
This open access ETD is published by Oberlin College Honors Theses and OhioLINK.