Technical Report Series on Global Modeling and Data Assimilation. Volume 5:Documentation of the Aires/Geos Dynamical Core, Version 2

摘要

A detailed description of the numerical formulation of Version 2 of theARIES/GEOS 'dynamical core' is presented. This code is a nearly 'plug-compatible' dynamics for use in atmospheric general circulation models (GCMs). It is a finite difference model on a staggered latitude-longitude C-grid. It uses second-order differences for all terms except the advection of vorticity by the rotation part of the flow, which is done at fourth-order accuracy. This dynamical core is currently being used in the climate (ARIES) and data assimilation (GEOS) GCMs at Goddard.