Documentation for a Two-Level Dynamic Thermodynamic Sea Ice Model.

• Main Author: Hibler,William D , III
• Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
• Format: Text
• Language: English
• Published: 1980
• Subjects: Snow; Ice and Permafrost; *COMPUTERIZED SIMULATION; *SEA ICE; MATHEMATICAL MODELS; THICKNESS; DISTRIBUTION; DYNAMICS; THERMODYNAMICS; ARCTIC OCEAN; Arctic; Arctic Ocean; Ice; permafrost; Sea ice
• Online Access: http://www.dtic.mil/docs/citations/ADA084273; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA084273

A discussion of the numerics and computer code for a two-level dynamic thermodynamic sea ice model is presented. For interested users a listing of the computer code and results from a 21-day test run are included as appendices. The model consists of a two-level ice thickness distribution coupled to the ice dynamics by a plastic rheology. In addition to the ice interaction the momentum balance includes nonlinear wind and water drag terms, Coriolis force, and inertial and momentum advection terms. The numerical scheme is formulated in an energy-conserving manner in a fixed Eulerian grid which allows simulation over unlimited time intervals. The momentum balance (including inertial terms) is numerically treated in a semi-implicit manner so that time steps of up to one day in length may be used if desired. The boundaries, grid size and time step magnitude are easily modified so that the model should have application to a variety of climate and forecasting problems.