The Hamburg Ocean Primitive Equation Model HOPE

• Main Authors: Wolff, J., Maier-Reimer, E., Legutke, S.
• Format: Report
• Language: English
• Published: 1997
• Subjects: Sea ice
• Online Access: http://hdl.handle.net/21.11116/0000-0009-1487-8; http://hdl.handle.net/21.11116/0000-0009-1489-6

HOPE is a primitive-equation model of the global ocean circulation, but may also be used for regional studies. Prognostic variables are the three-dimensional horizontal velocity fields, the sea-surface elevation, and the thermohaline variables. The equa- tions are discretized on prescribed horizontal surfaces using Arakawa-E-type grids. Two time levels are used for the integration. A Hibler-type dynamic sea-ice model allows a prognostic calculation of sea-ice thick- ness, compactness, and velocities. The thermodynamic growth of sea ice is calculated with heat balance equations using simple bulk formulae. A snow layer is included. HOPE is in particular useful for altimetry data assimilation purposes because of the prognostic calculation of the sea-surface elevation.