Abstract
The simulation of climate on Pleistocene time scales requires coupling subsystems with response time scales which vary over several orders of magnitude. Most models of the coupled atmosphere-ocean-cryosphere (AOC) system have treated the global ocean as a single isothermal reservoir, resulting in a relatively slow surface temperature response time scale. We use a series of one-dimensional box ocean models and a box-advection diffusion ocean model to demonstrate that the ocean temperature does not respond with a single time scale. In particular, the first half or more of the mixed layer response to a radiative perturbation is governed by the relatively small mixed layer thermal inertia, rather than by the deep ocean thermal inertia. We implement the box and box-advection-diffusion ocean models in the AOC model of (7), which uses a single isothermal ocean reservoir and exhibits internal oscillations. We find that internal oscillations are no longer a solution to their model, thereby confirming the importance of distinguishing between the mixed layer and deeper ocean thermal response time scales.
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© 1984 Springer Science+Business Media Dordrecht
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Harvey, L.D.D., Schneider, S.H. (1984). Sensitivity of Internally-Generated Climate Oscillations to Ocean Model Formulation. In: Berger, A., Imbrie, J., Hays, J., Kukla, G., Saltzman, B. (eds) Milankovitch and Climate. NATO ASI Series, vol 126. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-4841-4_12
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DOI: https://doi.org/10.1007/978-94-017-4841-4_12
Publisher Name: Springer, Dordrecht
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