Uncoupled AGCM-OGCM

Abstract

The UCLA atmospheric general circulation model (AGCM) is a state-of-the-art grid point model of the global atmosphere. The model predicts the horizontal wind, potential temperature, water vapor mixing ratio, planetary boundary layer (PBL) depth, and the surface pressure, as well as the surface temperature and snow depth over land. The horizontal finite differencing of the primitive equations is done on a staggered Arakawa "C" grid. The parallel version of the UCLA AGCM code was designed for distributed memory multiple-instruction-multiple-data (MIMD) computing environments. It is based on a two-dimensional (longitude-latitude) domain decomposition, message-passing strategy. Subdomains consist of vertical columns from the Earth's surface to the top of the atmosphere. The oceanic general circulation model (OGCM) is based on the Parallel Ocean Program (POP) developed at Los Alamos National Laboratory. This ocean model evolved from the Bryan-Cox three-dimensional primitive equations ocean model developed at NOAA Geophysical Fluid Dynamics Laboratory (GFDL). The model solves the three-dimensional Navier-Stokes equations in spherical coordinates using finite-difference techniques. In the POP code, the horizontal dimension is distributed across processors, while the vertical dimension is in a processor.

DateOfInformation

Thr Jul 9 14:51:58 1998

Domain

Scientific and Engineering Applications

Keyword

Atmospheric Sciences, Ocean Science

Language

Fortran 90, CRAY T3E shmem, PVM

Name

Uncoupled AGCM-OGCM

TargetEnvironment

Distributed computer systems (code has been optimized for CRAY T3D)

Webpage

http://www.atmos.ucla.edu/~drummond/Milestone4/nhse.html

ContactIs

C. Roberto Mechoso

Files

UCLA AGCM
Parallel Ocean Program (OGCM)