This repository contains a driver and key subcomponents of the atmospheric component of the NOAA's Unified Forecast System (UFS) weather model.

The subcomponents include:

• The Finite-Volume Cubed-Sphere (FV3) dynamical core, originally from the Geophysical Fluid Dynamics Laboratory.
• The Common Community Physics Package (CCPP) supported by the Developmental Testbed Center (DTC), including:
  • CCPP Framework.
  • CCPP Physics
• wrapper code to call UFS stochastic physics
• The io code handles netCDF I/O.
• The cpl coupler code connects the different components and allows them to communicate.

This package requires the following NCEPLIBS packages:

• NCEPLIBS-w3emc
• NCEPLIBS-bacio
• NCEPLIBS-nemsio
• NCEPLIBS-sp

If the INLINE_POST cmake variable is set, the upp library will be needed:

• Unified Post Processing Library

This package also requires the following external packages:

• netcdf-c Library
• netcdf-fortran Library
• ESMF
• GFDL's Flexible Modeling System

To obtain fv3atm, clone the git repository, and update the submodules:

git clone https://github.com/NOAA-EMC/fv3atm.git
cd fv3atm
git submodule update --init --recursive

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