Description:The Fifth Generation PSU/NCAR Mesoscale Model
Abstract:The PSU/NCAR mesoscale model is a limited-area, nonhydrostatic or hydrostatic (Version 2 only), terrain-following sigma-coordinate model designed to simulate or predict mesoscale and regional-scale atmospheric circulation.
The model (known as MM5) is supported by several auxiliary programs, which are referred to collectively as the MM5 modeling system.
Terrestrial and isobaric meteorological data are horizontally interpolated (programs TERRAIN and REGRID) from a latitude-longitude mesh to a variable high-resolution domain on either a Mercator, Lambert conformal, or polar stereographic projection. Since the interpolation does not provide mesoscale detail, the interpolated data may be enhanced (program RAWINS or little_r) with observations from the standard network of surface and rawinsonde stations using either a successive-scan Cressman technique or multiquadric scheme. Program INTERPF performs the vertical interpolation from pressure levels to the sigma coordinate system of MM5. Sigma surfaces near the ground closely follow the terrain, and the higher-level sigma surfaces tend to approximate isobaric surfaces. Since the vertical and horizontal resolution and domain size are variable, the modeling package programs employ parameterized dimensions requiring a variable amount of core memory.
<br>We are working on use of MM5 parallel model on Grid architecture. This model permits to derive winds direction and intensity on local scale from the ECMWF global scale model. MM5 model provides more detailed data input for tephra dispersion forecasting models used by INGV (like TEPHRA Model).
<br>Unix Operating System
<br>Gnu, C/Fortran compiler
<br>Intel, C/Fortran compiler
<br>Portland Group, PGI compiler
<br>Message Passing Interface (MPI)