Parallelization of GISS Model E: MPI etc. Igor Aleinov I would like to talk about general issues of parallelization of GISS Model E. I will start from an overview of the hardware and of typical methods for writing parallel code (i.e. MPI and OpenMP). I will then describe the implementation of MPI inside Model E, show some scaling results and discuss possible ways for future development. The goal of this talk is to get everybody up-to-date with respect to current state of Model E and to help developers to write their code in MPI-compatible way.