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Free Content Speculations on a schematic theory of the Younger Dryas

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Abstract:

The possible implications of a change in deep ocean mixing generated by the abrupt coverage of continental shelves during deglaciation is explored schematically. A simple Cartesian continental shelf/deep ocean tidal model is used to mimic the behavior of tidal dissipation at a variety of frequencies relative to a basin-near-resonance. The actual estimated sea level curve is then used to calculate a representative deep water tidal dissipation through time, which is then translated by means of a one-dimensional loop flow to explore the implications of a change in deep ocean mixing. It is possible to pick parameters for the loop model, which is analogous to the Stommel two-state box model, such that interesting transitions occur when diffusion alone is changed, including oscillatory responses. To the extent that the box model is believed to mimic the ocean circulation, it can produce shifts analogous to the re-glaciation and subsequent de-glaciation characterizing the Younger Dryas interval. That changing topography and winds would likely also have a profound influence on mixing by mesoscale disturbances is noted but not pursued.

Document Type: Research Article

DOI: http://dx.doi.org/10.1357/0022240053693761

Publication date: January 1, 2005

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  • The Journal of Marine Research publishes peer-reviewed research articles covering a broad array of topics in physical, biological and chemical oceanography. Articles that deal with processes, as well as those that report significant observations, are welcome. In the area of biology, studies involving coupling between ecological and physical processes are preferred over those that report systematics. Authors benefit from thorough reviews of their manuscripts, where an attempt is made to maximize clarity. The time between submission and publication is kept to a minimum; there is no page charge.
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