Difference between revisions of "Frequently asked questions about GEOS-Chem"
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=== Parallelization issues === | === Parallelization issues === | ||
| − | * [ | + | * [https://geos-chem.readthedocs.io/en/latest/geos-chem-shared-docs/supplemental-guides/parallel-guide.html#how-can-i-tell-what-should-go-into-the-omp-private-clause How can I tell if a variable has to be declared with <tt>!$OMP PRIVATE</tt> or <tt>!$OMP SHARED?</tt>] |
| − | * [ | + | * [https://geos-chem.readthedocs.io/en/latest/geos-chem-shared-docs/supplemental-guides/parallel-guide.html#how-many-cores-may-i-use-for-geos-chem-or-hemco How many CPU cores may I use for my GEOS-Chem simulation?] |
| − | * [ | + | * [https://geos-chem.readthedocs.io/en/latest/geos-chem-shared-docs/supplemental-guides/parallel-guide.html#why-is-geos-chem-is-not-using-all-the-cores-i-requested Why is GEOS-Chem not using all the CPU cores that I requested?] |
=== High-Performance GEOS-Chem (GCHP) === | === High-Performance GEOS-Chem (GCHP) === | ||
Revision as of 16:57, 23 May 2024
On this page we shall answer some commonly asked questions about GEOS-Chem.
Contents
Basic information about GEOS-Chem
For new users
- I am a GEOS-Chem new user. What is expected of me?
- Where can I find user manuals for GEOS-Chem and related software?
- Can I use GEOS-Chem on cloud-computing platforms?
- What types of simulations can I run with GEOS-Chem?
- What is the horizontal resolution and vertical resolution of GEOS-Chem?
- Which meteorological data fields can be used by GEOS-Chem?
- To whom may I direct GEOS-Chem-related questions?
- What does the GEOS-Chem Steering Committee do?
- What do the GEOS-Chem Working Groups do?
- What does the GEOS-Chem Support Team do?
- I see that there are several GEOS-Chem email lists. How can I subscribe?
Science questions
Where can I find information about ...
- types of GEOS-Chem simulations that I can run?
- bromine chemistry?
- The chemical solver used in GEOS-Chem?
- the Linoz stratospheric ozone chemistry scheme?
- the advection scheme in GEOS-Chem?
- the boundary layer mixing schemes in GEOS-Chem?
- the cloud convection schemes in GEOS-Chem?
- The Dry deposition and Wet deposition schemes in GEOS-Chem?
- GEOS-Chem nested grid simulations?
Technical issues
- How do I download the GEOS-Chem source code
- How do I create run directories?
- What should I do when I encounter an error while running GEOS-Chem?
- Is there a comprehensive list of GEOS-Chem bug reports?
- Do you have any information on how I can debug GEOS-Chem or HEMCO errors?
Parallelization issues
- How can I tell if a variable has to be declared with !$OMP PRIVATE or !$OMP SHARED?
- How many CPU cores may I use for my GEOS-Chem simulation?
- Why is GEOS-Chem not using all the CPU cores that I requested?
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 visit this link.
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 Debug GEOS-Chem and HEMCO errors 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.
