under a Creative Commons License. Climate of the Past Comparing transient, accelerated, and equilibrium simulations of

Abstract. We examine several aspects of the ocean-atmosphere system over the last 30 000 years, by carrying out simulations with prescribed ice sheets, atmospheric CO2 concentration, and orbital parameters. We use the GENIE-1 model with a frictional geostrophic ocean, dynamic sea ice, an energy bala...

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Bibliographic Details
Main Authors: D. J. Lunt, M. S. Williamson, P. J. Valdes, T. M. Lenton, R. Marsh
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
ice core
Ice Sheet
Sea ice
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.653.9632
http://www.clim-past.net/2/221/2006/cp-2-221-2006.pdf
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Summary:Abstract. We examine several aspects of the ocean-atmosphere system over the last 30 000 years, by carrying out simulations with prescribed ice sheets, atmospheric CO2 concentration, and orbital parameters. We use the GENIE-1 model with a frictional geostrophic ocean, dynamic sea ice, an energy balance atmosphere, and a land-surface scheme with fixed vegetation. A transient simulation, with bound-ary conditions derived from ice-core records and ice sheet reconstructions, is compared with equilibrium snapshot sim-ulations, including the Last Glacial Maximum (21 000 years before present; 21 kyrBP), mid-Holocene (6 kyrBP) and pre-industrial. The equilibrium snapshot simulations are all very similar to their corresponding time period in the transient simulation, indicating that over the last 30 000 years, the model’s ocean-atmosphere system is close to equilibrium

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