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On Long-Period Internal Oscillations in a Simple Climate Model with an Ice Sheet (Abstract)

Published online by Cambridge University Press:  20 January 2017

G. E. Birchfield  and
J. Weertman
G. E. Birchfield
Affiliation:
Department of Geological Sciences and Department of Engineering Sciences and Applied Mathematics, Northwestern University, Evanston, Illinois 60201, U.S.A.
J. Weertman
Affiliation:
Department of Geological Sciences and Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60201, U.S.A.
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Abstract
Information
Annals of Glaciology , Volume 5 , 1984 , pp. 200
Copyright
Copyright © International Glaciological Society 1984

We review numerical modeling studies of long- period oscillations which are Inherent in ice-sheet physics. Such studies are relevant to the 100 ka component found in proxy ice volume time series. We show the best numerical ice sheet/climate model does not that earlier results which were suggestive of low frequency oscillations now appear to be an artifact sustained oscillations, of nonlinear numerical instabilities in the models. Some specific sources of such numerical instabilities arising from the integration of the highly nonlinear equations in ice sheet models are mentioned. At present,the best numerical ice sheet/climate model does not appear to display a tendency to low frequenty self- sustained oscillations.