Difference between revisions of "Frequently asked questions about GEOS-Chem"

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=== GEOS-Chem seems to be running too slowly.  What can I do? ===
 
=== GEOS-Chem seems to be running too slowly.  What can I do? ===
  
You should be aware of [[GEOS-Chem Makefile Structure#Compile-time options that can slow down GEOS-Chem|several compile-time options that will slow down GEOS-Chem]].  Use these options only for debugging, but not in your production runs.
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There are several ways to [https://geos-chem.readthedocs.io/en/latest/gcc-guide/05-run/run-speedup.html speed up a slow GEOS-Chem simulation].  
  
 
If you are archiving many diagnostic quantities are a high temporal resolution (e.g. every hour), then this will increase the run time of your simulation.  You can try saving out less diagnostic quantities, or archiving at a lower temporal resolution (e.g. every day).
 
If you are archiving many diagnostic quantities are a high temporal resolution (e.g. every hour), then this will increase the run time of your simulation.  You can try saving out less diagnostic quantities, or archiving at a lower temporal resolution (e.g. every day).

Revision as of 19:18, 10 August 2022

On this page we shall answer some commonly asked questions about GEOS-Chem.

Basic information about GEOS-Chem

For new users

Science questions

Where can I find information about ...

--Bob Yantosca (talk) 17:45, 2 January 2019 (UTC)

Technical issues

Parallelization issues

High-Performance GEOS-Chem (GCHP)

Please see the GCHP user manual at gchp.readthedocs.iofor more information.

Where can I get restart files for GEOS-Chem?

For instructions on how to obtain a set of sample restart files that you can use to spin up your own simulations, please see the Restart Files section of our GEOS-Chem basics wiki page.

--Bob Yantosca (talk) 16:24, 6 January 2017 (UTC)

Running GEOS-Chem

Please see our Running GEOS-Chem wiki page.

How long does GEOS-Chem take to run?

It depends on your particular computing environment. We have posted several timing results from GEOS-Chem 7-day time test simulations.

GEOS-Chem seems to be running too slowly. What can I do?

There are several ways to speed up a slow GEOS-Chem simulation.

If you are archiving many diagnostic quantities are a high temporal resolution (e.g. every hour), then this will increase the run time of your simulation. You can try saving out less diagnostic quantities, or archiving at a lower temporal resolution (e.g. every day).

GEOS-Chem errors

Please also see our Guide to GEOS-Chem error messages and Debugging GEOS-Chem pages.

GEOS-Chem died with an error. What can I do?

Please see Understanding the different categories of errors section of our Guide to GEOS-Chem error messages.

--Bob Yantosca (talk) 14:40, 17 June 2019 (UTC)