Author(s)

C.F. Baillie, A.E. MacDonald, J.-L. Lee & S. Sun

Abstract

QNH is a Quasi Non-Hydrostatic meteorological model which has been cre- ated by A. E. MacDonald and under development for three years at the NOAA Forecast Systems Laboratory. QNH is well-posed and therefore runs with a minimum of dissipation and it is applicable to all atmospheric scales, from the small scale to the planetary scale. Since QNH uses explicit finite difference approximations in all three spatial dimensions, it is readily amenable to massively parallel processing. We have written the code in such a way that it is portable and achieves high performance on a wide range of serial, vector and parallel computers. In this paper we describe the QNH model and code. We give performance results for the generation of a hurricane meteorological test case, on several massivel

Keywords