The ICOsahedral Hydrostatic atmospheric Dynamical Core (ICOHDC) is an intermediate step between the ICON shallow water model and the fully compressible nonhydrostatic dynamical core. The main purpose of this development is to further test the discretization schemes designed for the icosahedral shallow water model (Bonaventura and Ringler 2005) through intercomparison with well-established hydrostatic models, especially the spectral transform dynamical core in the ECHAM5 model of the MPI-M.
The source code of the ICOHDC is based on the ICOSWM developed by Luca Bonaventura, Thomas Heinze and Peter Korn. Extension to 3D is carried out by Hui Wan, with contributions from Marco Giorgetta, Almut Gassmann, Jochen Förstner, Marco Restelli and Detlev Majewski.
A detailed description of the ICOHDC can be found in
Other important references include
Bonaventura, L., and T. Ringler (2005): Analysis of discrete shallow water models on geodesic Delaunay grids with C-type staggering, Mon. Wea. Rev., 133, 2351-2373.
Roeckner E. et al. (2003): The atmospheric general circulation model ECHAM5. PART I: model description. Technical Report 349, Max Planck Institute for Meteorology, Hamburg, Germany
Simmons A. J. and Burridge D. M. (1981): An energy and angular-momentum conserving vertical finite difference scheme and hybrid vertical coordinates. Mon. Wea. Rev. 109, 758-766.
Simmons A. J. and Strüfing R. (1981): An energy and angular-momentum conserving finite difference scheme, hybrid coordinates and medium-range weather prediction. Technical Report 28, ECMWF, Reading, UK.
Burridge D. M. and Haseler J. (1977): A model for medium range weather forecasting - adiabatic formulation. Technical Report 4, ECMWF, Reading, UK.