Download data with a dry-run simulation


If you are located at an institution with many other GEOS-Chem users, then the necessary input data might have already been downloaded and stored in a commmon directory on your system. Ask your sysadmin or IT support staff.


Another way to download and manage GEOS-Chem input data is with the bashdatacatalog tool.

A “dry-run” is a is a GEOS-Chem Classic simulation that steps through time, but does not perform computations or read data files from disk. Instead, a dry-run simulation prints a list of all data files that a regular GEOS-Chem simulation would have read. The dry-run output also denotes whether each data file was found on disk, or if it is missing. This output can be fed to a script which will download the missing data files to your computer system.

You may generate dry-run output for any of the GEOS-Chem Classic simulation types (fullchem, CH4, TransportTracers, etc.)

In the following chapters, you will learn how to you can download data using the output from a dry-run simulation: