An asynchronously coupled continental ice sheet/energy balance/climate model
Steen, Robert Samuel
Master of Science
The climate system exhibits behavior on a wide range of time and spatial scales. Computer models that simulate climate must be faithful to these matters of scale in order to achieve meaningful results. This study involves the consolidation of two models: a model that simulates the seasonal fluctuations of the atmosphere and ocean with a time constant of one day and a continental ice sheet model designed to simulate the behavior of ice sheets over tens of thousands of years. These models are asynchronously coupled in both time and space because computational requirements limit the minimum grid size and time step size. Experiments are presented which examine the long time constant of the continental ice sheet and the fast approach to quasi-equilibrium of the seasonal model. Simulations of present day conditions from the combined model are compared with climate observations and simulations of other climate models.