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Terminology

absolute path

The full path to a file, e.g., /example/foo/bar.txt. An absolute path should always start with /. As opposed to a relative path.

relative path

The path to a file relative to the current working directory. For example, the relative path to /example/foo/bar.txt if your current working directory is /example is foo/bar.txt. As opposed to an absolute path.

compile

Generating an executable program from source code (which is in a plain-text format).

dependencies

The software libraries that are needed to compile GCHP. These include HDF5, NetCDF, and ESMF. See software_requirements for a complete list.

environment

The software packages and software configuration that are active in your current terminal or script. In Linux, the ${HOME}/.bashrc script performs automatic configuration when your terminal starts. You can manually configure your environment by running commands like source path_to_a_script or with tools like TCL or LMod for modulefiles. Software containers are effectively a prepackaged operating system + software + environment.

software environment

See environment.

terminal

A command-line.

script

A file that scripts a sequence of commands. Typically a bash that is written to execute a sequence of commands.

checkpoint file

See restart file.

build

See compile.

build directory

A directory where build configuration settings are stored, and where intermediate build files like object files, module files, and libraries are stored.

run directory

The working directory for a GEOS-Chem simulation. A run directory houses the simulation's configuration files, the output directory (OutputDir), and input files/links such as restart files <restart file> or input data directories.

restart file

A NetCDF file with initial conditions for a simulation. Also called a checkpoint file in GCHP.

target face

The face of a stretched-grid that is refined. The target face is centered on the target point.

stretched-grid

A cubed-sphere grid that is "stretched" to enhance the grid resolution in a region.

gridded component

A formal model component. MAPL organizes model components with a tree structure, and facilitates component interconnections.

HISTORY

The MAPL gridded component that handles model output. All GCHP output diagnostics are facilitated by HISTORY.