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

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(How long does GEOS-Chem take to run?)
(Basic information about GEOS-Chem)
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=== For new users ===
 
=== For new users ===
  
* [[GEOS-Chem welcome letter for new users|I am a GEOS-Chem new user.  What is expected of me?]]
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* [https://geos-chem.seas.harvard.edu/geos-welcome I am a GEOS-Chem new user.  What is expected of me?]
* [[Minimum system requirements for GEOS-Chem|On what types of machines can I run GEOS-Chem?]]
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* [https://geos-chem.readthedocs.io/en/latest/geos-chem-shared-docs/supplemental-guides/related-docs.html Where can I find user manuals for GEOS-Chem?]
 
* [http://cloud.geos-chem.org Can I use GEOS-Chem on cloud-computing platforms?]
 
* [http://cloud.geos-chem.org Can I use GEOS-Chem on cloud-computing platforms?]
 
* [[Species in GEOS-Chem|What types of simulations can I run with GEOS-Chem?]]
 
* [[Species in GEOS-Chem|What types of simulations can I run with GEOS-Chem?]]
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* [[Overview of GMAO met data products|Which meteorological data fields can be used by GEOS-Chem?]]
 
* [[Overview of GMAO met data products|Which meteorological data fields can be used by GEOS-Chem?]]
 
* [[Submitting GEOS-Chem support requests|To whom can I direct GEOS-Chem-related questions?]]
 
* [[Submitting GEOS-Chem support requests|To whom can I direct GEOS-Chem-related questions?]]
* [http://acmg.seas.harvard.edu/geos/geos_steering_cmte.html What does the GEOS-Chem Steering Committee do?]
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* [https://geos-chem.seas.harvard.edu/geos-steering-cmte What does the GEOS-Chem Steering Committee do?]
* [http://acmg.seas.harvard.edu/geos/geos_working_groups.html What do the GEOS-Chem Working Groups do?]
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* [https://geos-chem.seas.harvard.edu/geos-working-groups What do the GEOS-Chem Working Groups do?]
 
* [[GEOS-Chem Support Team|What does the GEOS-Chem Support Team do?]]
 
* [[GEOS-Chem Support Team|What does the GEOS-Chem Support Team do?]]
 
* [[Subscribing_to_the_GEOS-Chem_email_lists|I see that there are several GEOS-Chem email lists.  How can I subscribe?]]
 
* [[Subscribing_to_the_GEOS-Chem_email_lists|I see that there are several GEOS-Chem email lists.  How can I subscribe?]]
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* Do you have any information about [[Guide to GEOS-Chem performance|GEOS-Chem performance]] and [[GEOS-Chem scalability]]?
 
* Do you have any information about [[Guide to GEOS-Chem performance|GEOS-Chem performance]] and [[GEOS-Chem scalability]]?
 
* [[GEOS-Chem Makefile Structure|Where can I learn more about the GEOS-Chem Makefiles?]]
 
* [[GEOS-Chem Makefile Structure|Where can I learn more about the GEOS-Chem Makefiles?]]
* [[Bugs and fixes|Is there a comprehensive list of GEOS-Chem bugs and how they were fixed?]]
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* [https://github.com/geoschem/geos-chem/issues Is there a comprehensive list of GEOS-Chem bug reports?]
* [[GEOS-Chem basics|I am new to programming.  Do you have any online resources or tutorials?]]
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* Do you have any information on how I can [https://geos-chem.readthedocs.io/en/latest/geos-chem-shared-docs/supplemental-guides/debug-guide.html |debug GEOS-Chem or HEMCO?]
* Are there any [[Floating point math issues|numerical issues]] that I should be aware of?
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* Do you have any tools that would help me [[Debugging with the GEOS-Chem unit tester|debug GEOS-Chem more efficiently?]]
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--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 17:45, 2 January 2019 (UTC)
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=== Parallelization issues ===
 
=== Parallelization issues ===
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* [[Parallelizing_GEOS-Chem#How_many_CPUs_may_I_use_in_my_GEOS-Chem_simulation.3F|How many CPUs may I use for my GEOS-Chem simulation?]]
 
* [[Parallelizing_GEOS-Chem#How_many_CPUs_may_I_use_in_my_GEOS-Chem_simulation.3F|How many CPUs may I use for my GEOS-Chem simulation?]]
 
* [[Parallelizing_GEOS-Chem#Why_is_GEOS-Chem_is_not_using_all_the_CPUs_I_requested.3F|Why is GEOS-Chem not using all the CPUs that I requested?]]
 
* [[Parallelizing_GEOS-Chem#Why_is_GEOS-Chem_is_not_using_all_the_CPUs_I_requested.3F|Why is GEOS-Chem not using all the CPUs that I requested?]]
 
--[[User:Bmy|Bob Yantosca]] ([[User talk:Bmy|talk]]) 17:45, 2 January 2019 (UTC)
 
  
 
=== High-Performance GEOS-Chem (GCHP) ===
 
=== High-Performance GEOS-Chem (GCHP) ===
  
Please see the [[GCHP_Main_Page|GCHP main wiki page]] for information about GCHP.
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Please see the GCHP user manual at [https://gchp.readthedocs.io <tt>gchp.readthedocs.io</tt?]for more information.
  
 
== Where can I get restart files for GEOS-Chem? ==
 
== Where can I get restart files for GEOS-Chem? ==

Revision as of 19:15, 10 August 2022

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

Basic information about GEOS-Chem

For new users

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

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.io</tt?for 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?

You should be aware of several compile-time options that will slow down GEOS-Chem. Use these options only for debugging, but not in your production runs.

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)