We are pleased to announce the release of the geodynamo simulation code Calypso 1.0.0. This is the first release of Calypso through Computational Infrastructure for Geodynamics (CIG).

Calypso is a program package of magnetohydrodynamics (MHD) simulations in a rotating spherical shell for geodynamo problems. This package consists of the simulation program, preprocessing program, post processing program to generate field data for visualization programs, and several small utilities. The simulation program runs on parallel computing systems using MPI and OpenMP parallelization.

Currently, Calypso 1.0.0 supports the following features and capabilities:

• Magnetohydrodynamics simulation for a Boussinesq fluid in a rotating spherical shell.
• Convection driven by thermal and compositional buoyancy.
• Temperature or heat flux is fixed at boundaries
• Composition or compositional flux is fixed at boundaries
• Non-slip or free-slip boundary conditions
• Outside of the fluid shell is electrically insulated or pseudo vacuum boundary.
• A conductive inner core with the same conductivity as the surrounding fluid
• A rotating inner core driven by the magnetic and viscous torques.

You can download the source code and manual from:

http://geodynamics.org/cig/software/calypso

Detailed installation instructions for compiling and running Calypso are in the user manual as well as several examples and background material. If you have any questions regarding Calypso or its operation, please contact the authors through the cig-geodyn@geodynamics.org mailing list.